401k Plan data: ATARA BIO 401(K) PLAN plan

ATARA BIO 401(K) PLAN 401k Plan overview

Plan Name	ATARA BIO 401(K) PLAN
Plan identification number	001

ATARA BIO 401(K) PLAN Benefits

401k Plan Type

Defined Contribution Pension

Plan Features/Benefits

Profit-sharing
ERISA section 404(c) Plan - This plan, or any part of it is intended to meet the conditions of 29 CFR 2550.404c-1.
Total participant-directed account plan - Participants have the opportunity to direct the investment of all the assets allocated to their individual accounts, regardless of whether 29 CFR 2550.404c-1 is intended to be met.
Code section 401(k) feature - A cash or deferred arrangement described in Code section 401(k) that is part of a qualified defined contribution plan that provides for an election by employees to defer part of their compensation or receive these amounts in cash.
Code section 401(m) arrangement - Employee contributions are allocated to separate accounts under the plan or employer contributions are based, in whole or in part, on employee deferrals or contribtions to the plan. Not applicable if plan is 401(k) plan with only QNECs and/or QMACs. Also not applicable if Code section 403(b)(1), 403(b)(7) or 408 arrangements/accounts/annuities.
Plan provides for automatic enrollment in plan that has employee contributions deducted from payroll.
Total or partial participant-directed account plan - plan uses default investment account for participants who fail to direct assets in their account.
Master plan - A pension plan that is made available by a sponsor for adoption by employers; that is the subject of a favorable opinion letter; and for which a single funding medium (for example, a trust or custodial account) is established for the joint use of all adopting employers.

401k Sponsoring company profile

ATARA BIOTHERAPEUTICS, INC. has sponsored the creation of one or more 401k plans.

Company Name: ATARA BIOTHERAPEUTICS, INC.

Employer identification number (EIN): 460920988

NAIC Classification: 325410

Form 5500 Filing Information

Submission information for form 5500 for 401k plan ATARA BIO 401(K) PLAN

Plan id# Filing Submission Date Name of Administrator Date Administrator Signed Name of Company Sponsor Date Sponsor Signed
001 2022-01-01
001 2021-01-01
001 2020-01-01
001 2019-01-01
001 2018-01-01
001 2017-01-01 UTPAL KOPPIKAR 2018-07-10 UTPAL KOPPIKAR 2018-07-10
001 2016-01-01 JOHN MCGRATH 2017-08-09 JOHN MCGRATH 2017-08-09
001 2015-01-01 JOHN MCGRATH 2016-07-07 ATARA BIO 2016-07-07

Plan id#	Filing Submission Date	Name of Administrator	Date Administrator Signed	Name of Company Sponsor	Date Sponsor Signed
001	2022-01-01
001	2021-01-01
001	2020-01-01
001	2019-01-01
001	2018-01-01
001	2017-01-01	UTPAL KOPPIKAR	2018-07-10	UTPAL KOPPIKAR	2018-07-10
001	2016-01-01	JOHN MCGRATH	2017-08-09	JOHN MCGRATH	2017-08-09
001	2015-01-01	JOHN MCGRATH	2016-07-07	ATARA BIO	2016-07-07

Plan Statistics for ATARA BIO 401(K) PLAN

401k plan membership statisitcs for ATARA BIO 401(K) PLAN

Measure Date Value
2022: ATARA BIO 401(K) PLAN 2022 401k membership
Total participants, beginning-of-year 2022-01-01 729
Total number of active participants reported on line 7a of the Form 5500 2022-01-01 336
Number of retired or separated participants receiving benefits 2022-01-01 1
Number of other retired or separated participants entitled to future benefits 2022-01-01 329
Total of all active and inactive participants 2022-01-01 666
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2022-01-01 0
Total participants 2022-01-01 666
Number of participants with account balances 2022-01-01 652
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2022-01-01 0
2021: ATARA BIO 401(K) PLAN 2021 401k membership
Total participants, beginning-of-year 2021-01-01 564
Total number of active participants reported on line 7a of the Form 5500 2021-01-01 575
Number of retired or separated participants receiving benefits 2021-01-01 0
Number of other retired or separated participants entitled to future benefits 2021-01-01 154
Total of all active and inactive participants 2021-01-01 729
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2021-01-01 0
Total participants 2021-01-01 729
Number of participants with account balances 2021-01-01 711
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2021-01-01 0
2020: ATARA BIO 401(K) PLAN 2020 401k membership
Total participants, beginning-of-year 2020-01-01 468
Total number of active participants reported on line 7a of the Form 5500 2020-01-01 430
Number of retired or separated participants receiving benefits 2020-01-01 0
Number of other retired or separated participants entitled to future benefits 2020-01-01 134
Total of all active and inactive participants 2020-01-01 564
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2020-01-01 0
Total participants 2020-01-01 564
Number of participants with account balances 2020-01-01 538
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2020-01-01 0
2019: ATARA BIO 401(K) PLAN 2019 401k membership
Total participants, beginning-of-year 2019-01-01 345
Total number of active participants reported on line 7a of the Form 5500 2019-01-01 387
Number of retired or separated participants receiving benefits 2019-01-01 0
Number of other retired or separated participants entitled to future benefits 2019-01-01 80
Total of all active and inactive participants 2019-01-01 467
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2019-01-01 1
Total participants 2019-01-01 468
Number of participants with account balances 2019-01-01 441
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2019-01-01 0
2018: ATARA BIO 401(K) PLAN 2018 401k membership
Total participants, beginning-of-year 2018-01-01 185
Total number of active participants reported on line 7a of the Form 5500 2018-01-01 309
Number of retired or separated participants receiving benefits 2018-01-01 0
Number of other retired or separated participants entitled to future benefits 2018-01-01 36
Total of all active and inactive participants 2018-01-01 345
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2018-01-01 0
Total participants 2018-01-01 345
Number of participants with account balances 2018-01-01 307
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2018-01-01 0

Measure	Date	Value
2022: ATARA BIO 401(K) PLAN 2022 401k membership
Total participants, beginning-of-year	2022-01-01	729
Total number of active participants reported on line 7a of the Form 5500	2022-01-01	336
Number of retired or separated participants receiving benefits	2022-01-01	1
Number of other retired or separated participants entitled to future benefits	2022-01-01	329
Total of all active and inactive participants	2022-01-01	666
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2022-01-01	0
Total participants	2022-01-01	666
Number of participants with account balances	2022-01-01	652
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2022-01-01	0
2021: ATARA BIO 401(K) PLAN 2021 401k membership
Total participants, beginning-of-year	2021-01-01	564
Total number of active participants reported on line 7a of the Form 5500	2021-01-01	575
Number of retired or separated participants receiving benefits	2021-01-01	0
Number of other retired or separated participants entitled to future benefits	2021-01-01	154
Total of all active and inactive participants	2021-01-01	729
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2021-01-01	0
Total participants	2021-01-01	729
Number of participants with account balances	2021-01-01	711
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2021-01-01	0
2020: ATARA BIO 401(K) PLAN 2020 401k membership
Total participants, beginning-of-year	2020-01-01	468
Total number of active participants reported on line 7a of the Form 5500	2020-01-01	430
Number of retired or separated participants receiving benefits	2020-01-01	0
Number of other retired or separated participants entitled to future benefits	2020-01-01	134
Total of all active and inactive participants	2020-01-01	564
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2020-01-01	0
Total participants	2020-01-01	564
Number of participants with account balances	2020-01-01	538
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2020-01-01	0
2019: ATARA BIO 401(K) PLAN 2019 401k membership
Total participants, beginning-of-year	2019-01-01	345
Total number of active participants reported on line 7a of the Form 5500	2019-01-01	387
Number of retired or separated participants receiving benefits	2019-01-01	0
Number of other retired or separated participants entitled to future benefits	2019-01-01	80
Total of all active and inactive participants	2019-01-01	467
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2019-01-01	1
Total participants	2019-01-01	468
Number of participants with account balances	2019-01-01	441
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2019-01-01	0
2018: ATARA BIO 401(K) PLAN 2018 401k membership
Total participants, beginning-of-year	2018-01-01	185
Total number of active participants reported on line 7a of the Form 5500	2018-01-01	309
Number of retired or separated participants receiving benefits	2018-01-01	0
Number of other retired or separated participants entitled to future benefits	2018-01-01	36
Total of all active and inactive participants	2018-01-01	345
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2018-01-01	0
Total participants	2018-01-01	345
Number of participants with account balances	2018-01-01	307
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2018-01-01	0

Financial Data on ATARA BIO 401(K) PLAN

Measure	Date	Value
2022 : ATARA BIO 401(K) PLAN 2022 401k financial data
Unrealized appreciation/depreciation of real estate assets	2022-12-31	$0
Unrealized appreciation/depreciation of other (non real estate) assets	2022-12-31	$0
Total unrealized appreciation/depreciation of assets	2022-12-31	$0
Total transfer of assets to this plan	2022-12-31	$0
Total transfer of assets from this plan	2022-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2022-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2022-12-31	$0
Expenses. Interest paid	2022-12-31	$0
Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102	2022-12-31	$0
Total income from all sources (including contributions)	2022-12-31	$3,984,729
Total loss/gain on sale of assets	2022-12-31	$0
Total of all expenses incurred	2022-12-31	$6,778,473
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2022-12-31	$6,677,799
Expenses. Certain deemed distributions of participant loans	2022-12-31	$0
Value of total corrective distributions	2022-12-31	$10,961
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2022-12-31	$11,845,880
Value of total assets at end of year	2022-12-31	$36,759,571
Value of total assets at beginning of year	2022-12-31	$39,553,315
Total of administrative expenses incurred including professional, contract, advisory and management fees	2022-12-31	$89,713
Total income from rents	2022-12-31	$0
Total interest from all sources	2022-12-31	$17,383
Total dividends received (eg from common stock, registered investment company shares)	2022-12-31	$906,945
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2022-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2022-12-31	$906,945
Assets. Real estate other than employer real property at end of year	2022-12-31	$0
Assets. Real estate other than employer real property at beginning of year	2022-12-31	$0
Administrative expenses professional fees incurred	2022-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at end of year	2022-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2022-12-31	$0
Was this plan covered by a fidelity bond	2022-12-31	Yes
Value of fidelity bond cover	2022-12-31	$1,000,000
If this is an individual account plan, was there a blackout period	2022-12-31	No
Were there any nonexempt tranactions with any party-in-interest	2022-12-31	No
Contributions received from participants	2022-12-31	$7,505,977
Participant contributions at end of year	2022-12-31	$416,643
Participant contributions at beginning of year	2022-12-31	$461,069
Participant contributions at end of year	2022-12-31	$0
Participant contributions at beginning of year	2022-12-31	$0
Assets. Other investments not covered elsewhere at end of year	2022-12-31	$0
Assets. Other investments not covered elsewhere at beginning of year	2022-12-31	$0
Income. Received or receivable in cash from other sources (including rollovers)	2022-12-31	$1,872,603
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2022-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at end of year	2022-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2022-12-31	$0
Assets. Loans (other than to participants) at end of year	2022-12-31	$0
Assets. Loans (other than to participants) at beginning of year	2022-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2022-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2022-12-31	$0
Other income not declared elsewhere	2022-12-31	$0
Administrative expenses (other) incurred	2022-12-31	$89,713
Liabilities. Value of operating payables at end of year	2022-12-31	$0
Liabilities. Value of operating payables at beginning of year	2022-12-31	$0
Total non interest bearing cash at end of year	2022-12-31	$0
Total non interest bearing cash at beginning of year	2022-12-31	$0
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2022-12-31	No
Income. Non cash contributions	2022-12-31	$0
Value of net income/loss	2022-12-31	$-2,793,744
Value of net assets at end of year (total assets less liabilities)	2022-12-31	$36,759,571
Value of net assets at beginning of year (total assets less liabilities)	2022-12-31	$39,553,315
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2022-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2022-12-31	No
Were any leases to which the plan was party in default or uncollectible	2022-12-31	No
Assets. partnership/joint venture interests at end of year	2022-12-31	$0
Assets. partnership/joint venture interests at beginning of year	2022-12-31	$0
Investment advisory and management fees	2022-12-31	$0
Value of interest in registered invesment companies (eg mutual funds) at end of year	2022-12-31	$35,640,832
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2022-12-31	$38,537,689
Value of interest in pooled separate accounts at end of year	2022-12-31	$0
Value of interest in pooled separate accounts at beginning of year	2022-12-31	$0
Interest on participant loans	2022-12-31	$17,371
Income. Interest from loans (other than to participants)	2022-12-31	$0
Interest earned on other investments	2022-12-31	$0
Income. Interest from US Government securities	2022-12-31	$0
Income. Interest from corporate debt instruments	2022-12-31	$0
Value of interest in master investment trust accounts at end of year	2022-12-31	$0
Value of interest in master investment trust accounts at beginning of year	2022-12-31	$0
Value of interest in common/collective trusts at end of year	2022-12-31	$700,593
Value of interest in common/collective trusts at beginning of year	2022-12-31	$554,546
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2022-12-31	$1,503
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2022-12-31	$11
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2022-12-31	$11
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2022-12-31	$12
Assets. Value of investments in 103.12 investment entities at end of year	2022-12-31	$0
Assets. Value of investments in 103.12 investment entities at beginning of year	2022-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at end of year	2022-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year	2022-12-31	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2022-12-31	$0
Asset value of US Government securities at end of year	2022-12-31	$0
Asset value of US Government securities at beginning of year	2022-12-31	$0
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2022-12-31	$-8,800,561
Net investment gain/loss from pooled separate accounts	2022-12-31	$0
Net investment gain or loss from common/collective trusts	2022-12-31	$15,082
Net gain/loss from 103.12 investment entities	2022-12-31	$0
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2022-12-31	No
Was there a failure to transmit to the plan any participant contributions	2022-12-31	No
Has the plan failed to provide any benefit when due under the plan	2022-12-31	No
Assets. Invements in employer securities at end of year	2022-12-31	$0
Assets. Invements in employer securities at beginning of year	2022-12-31	$0
Assets. Value of employer real property at end of year	2022-12-31	$0
Assets. Value of employer real property at beginning of year	2022-12-31	$0
Contributions received in cash from employer	2022-12-31	$2,467,300
Employer contributions (assets) at end of year	2022-12-31	$0
Employer contributions (assets) at beginning of year	2022-12-31	$0
Income. Dividends from preferred stock	2022-12-31	$0
Income. Dividends from common stock	2022-12-31	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2022-12-31	$6,677,799
Asset. Corporate debt instrument preferred debt at end of year	2022-12-31	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2022-12-31	$0
Asset. Corporate debt instrument debt (other) at end of year	2022-12-31	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2022-12-31	$0
Contract administrator fees	2022-12-31	$0
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2022-12-31	No
Assets. Corporate common stocks other than exployer securities at end of year	2022-12-31	$0
Assets. Corporate common stocks other than exployer securities at beginning of year	2022-12-31	$0
Liabilities. Value of benefit claims payable at end of year	2022-12-31	$0
Liabilities. Value of benefit claims payable at beginning of year	2022-12-31	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2022-12-31	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2022-12-31	$0
Did the plan have assets held for investment	2022-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2022-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2022-12-31	No
Aggregate proceeds on sale of assets	2022-12-31	$0
Aggregate carrying amount (costs) on sale of assets	2022-12-31	$0
Liabilities. Value of acquisition indebtedness at end of year	2022-12-31	$0
Liabilities. Value of acquisition indebtedness at beginning of year	2022-12-31	$0
Opinion of an independent qualified public accountant for this plan	2022-12-31	Unqualified
Accountancy firm name	2022-12-31	ARMANINO
Accountancy firm EIN	2022-12-31	946214841
2021 : ATARA BIO 401(K) PLAN 2021 401k financial data
Unrealized appreciation/depreciation of real estate assets	2021-12-31	$0
Unrealized appreciation/depreciation of other (non real estate) assets	2021-12-31	$0
Total unrealized appreciation/depreciation of assets	2021-12-31	$0
Total transfer of assets to this plan	2021-12-31	$0
Total transfer of assets from this plan	2021-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2021-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2021-12-31	$0
Expenses. Interest paid	2021-12-31	$0
Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102	2021-12-31	$0
Total income from all sources (including contributions)	2021-12-31	$17,228,045
Total loss/gain on sale of assets	2021-12-31	$0
Total of all expenses incurred	2021-12-31	$3,925,304
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2021-12-31	$3,859,067
Expenses. Certain deemed distributions of participant loans	2021-12-31	$0
Value of total corrective distributions	2021-12-31	$0
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2021-12-31	$12,393,530
Value of total assets at end of year	2021-12-31	$39,553,315
Value of total assets at beginning of year	2021-12-31	$26,250,574
Total of administrative expenses incurred including professional, contract, advisory and management fees	2021-12-31	$66,237
Total income from rents	2021-12-31	$0
Total interest from all sources	2021-12-31	$10,741
Total dividends received (eg from common stock, registered investment company shares)	2021-12-31	$1,317,570
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2021-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2021-12-31	$1,317,570
Assets. Real estate other than employer real property at end of year	2021-12-31	$0
Assets. Real estate other than employer real property at beginning of year	2021-12-31	$0
Administrative expenses professional fees incurred	2021-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at end of year	2021-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2021-12-31	$0
Was this plan covered by a fidelity bond	2021-12-31	Yes
Value of fidelity bond cover	2021-12-31	$500,000
If this is an individual account plan, was there a blackout period	2021-12-31	Yes
Were there any nonexempt tranactions with any party-in-interest	2021-12-31	No
Contributions received from participants	2021-12-31	$7,511,963
Participant contributions at end of year	2021-12-31	$461,069
Participant contributions at beginning of year	2021-12-31	$151,984
Participant contributions at end of year	2021-12-31	$0
Participant contributions at beginning of year	2021-12-31	$0
Assets. Other investments not covered elsewhere at end of year	2021-12-31	$0
Assets. Other investments not covered elsewhere at beginning of year	2021-12-31	$0
Income. Received or receivable in cash from other sources (including rollovers)	2021-12-31	$2,612,625
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2021-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at end of year	2021-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2021-12-31	$0
Assets. Loans (other than to participants) at end of year	2021-12-31	$0
Assets. Loans (other than to participants) at beginning of year	2021-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2021-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2021-12-31	$0
Other income not declared elsewhere	2021-12-31	$-6,967
Administrative expenses (other) incurred	2021-12-31	$66,237
Liabilities. Value of operating payables at end of year	2021-12-31	$0
Liabilities. Value of operating payables at beginning of year	2021-12-31	$0
Total non interest bearing cash at end of year	2021-12-31	$0
Total non interest bearing cash at beginning of year	2021-12-31	$0
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2021-12-31	No
Income. Non cash contributions	2021-12-31	$0
Value of net income/loss	2021-12-31	$13,302,741
Value of net assets at end of year (total assets less liabilities)	2021-12-31	$39,553,315
Value of net assets at beginning of year (total assets less liabilities)	2021-12-31	$26,250,574
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2021-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2021-12-31	No
Were any leases to which the plan was party in default or uncollectible	2021-12-31	No
Assets. partnership/joint venture interests at end of year	2021-12-31	$0
Assets. partnership/joint venture interests at beginning of year	2021-12-31	$0
Investment advisory and management fees	2021-12-31	$0
Value of interest in registered invesment companies (eg mutual funds) at end of year	2021-12-31	$38,537,689
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2021-12-31	$25,438,297
Value of interest in pooled separate accounts at end of year	2021-12-31	$0
Value of interest in pooled separate accounts at beginning of year	2021-12-31	$0
Interest on participant loans	2021-12-31	$10,741
Income. Interest from loans (other than to participants)	2021-12-31	$0
Interest earned on other investments	2021-12-31	$0
Income. Interest from US Government securities	2021-12-31	$0
Income. Interest from corporate debt instruments	2021-12-31	$0
Value of interest in master investment trust accounts at end of year	2021-12-31	$0
Value of interest in master investment trust accounts at beginning of year	2021-12-31	$0
Value of interest in common/collective trusts at end of year	2021-12-31	$554,546
Value of interest in common/collective trusts at beginning of year	2021-12-31	$376,942
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2021-12-31	$11
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2021-12-31	$6,525
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2021-12-31	$6,525
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2021-12-31	$0
Assets. Value of investments in 103.12 investment entities at end of year	2021-12-31	$0
Assets. Value of investments in 103.12 investment entities at beginning of year	2021-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at end of year	2021-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year	2021-12-31	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2021-12-31	$0
Asset value of US Government securities at end of year	2021-12-31	$0
Asset value of US Government securities at beginning of year	2021-12-31	$0
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2021-12-31	$3,501,534
Net investment gain/loss from pooled separate accounts	2021-12-31	$0
Net investment gain or loss from common/collective trusts	2021-12-31	$11,637
Net gain/loss from 103.12 investment entities	2021-12-31	$0
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2021-12-31	No
Was there a failure to transmit to the plan any participant contributions	2021-12-31	No
Has the plan failed to provide any benefit when due under the plan	2021-12-31	No
Assets. Invements in employer securities at end of year	2021-12-31	$0
Assets. Invements in employer securities at beginning of year	2021-12-31	$0
Assets. Value of employer real property at end of year	2021-12-31	$0
Assets. Value of employer real property at beginning of year	2021-12-31	$0
Contributions received in cash from employer	2021-12-31	$2,268,942
Employer contributions (assets) at end of year	2021-12-31	$0
Employer contributions (assets) at beginning of year	2021-12-31	$276,826
Income. Dividends from preferred stock	2021-12-31	$0
Income. Dividends from common stock	2021-12-31	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2021-12-31	$3,859,067
Asset. Corporate debt instrument preferred debt at end of year	2021-12-31	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2021-12-31	$0
Asset. Corporate debt instrument debt (other) at end of year	2021-12-31	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2021-12-31	$0
Contract administrator fees	2021-12-31	$0
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2021-12-31	Yes
Assets. Corporate common stocks other than exployer securities at end of year	2021-12-31	$0
Assets. Corporate common stocks other than exployer securities at beginning of year	2021-12-31	$0
Liabilities. Value of benefit claims payable at end of year	2021-12-31	$0
Liabilities. Value of benefit claims payable at beginning of year	2021-12-31	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2021-12-31	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2021-12-31	$0
Did the plan have assets held for investment	2021-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2021-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2021-12-31	No
Aggregate proceeds on sale of assets	2021-12-31	$0
Aggregate carrying amount (costs) on sale of assets	2021-12-31	$0
Liabilities. Value of acquisition indebtedness at end of year	2021-12-31	$0
Liabilities. Value of acquisition indebtedness at beginning of year	2021-12-31	$0
Opinion of an independent qualified public accountant for this plan	2021-12-31	Unqualified
Accountancy firm name	2021-12-31	ARMANINO
Accountancy firm EIN	2021-12-31	946214841
2020 : ATARA BIO 401(K) PLAN 2020 401k financial data
Total unrealized appreciation/depreciation of assets	2020-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2020-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2020-12-31	$0
Total income from all sources (including contributions)	2020-12-31	$12,813,787
Total loss/gain on sale of assets	2020-12-31	$0
Total of all expenses incurred	2020-12-31	$2,891,181
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2020-12-31	$2,826,226
Value of total corrective distributions	2020-12-31	$11,011
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2020-12-31	$8,721,135
Value of total assets at end of year	2020-12-31	$26,250,574
Value of total assets at beginning of year	2020-12-31	$16,327,968
Total of administrative expenses incurred including professional, contract, advisory and management fees	2020-12-31	$53,944
Total interest from all sources	2020-12-31	$9,165
Total dividends received (eg from common stock, registered investment company shares)	2020-12-31	$313,763
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2020-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2020-12-31	$313,763
Was this plan covered by a fidelity bond	2020-12-31	Yes
Value of fidelity bond cover	2020-12-31	$500,000
If this is an individual account plan, was there a blackout period	2020-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2020-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2020-12-31	No
Contributions received from participants	2020-12-31	$6,018,492
Participant contributions at end of year	2020-12-31	$151,984
Participant contributions at beginning of year	2020-12-31	$220,157
Income. Received or receivable in cash from other sources (including rollovers)	2020-12-31	$621,321
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2020-12-31	No
Value of net income/loss	2020-12-31	$9,922,606
Value of net assets at end of year (total assets less liabilities)	2020-12-31	$26,250,574
Value of net assets at beginning of year (total assets less liabilities)	2020-12-31	$16,327,968
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2020-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2020-12-31	No
Were any leases to which the plan was party in default or uncollectible	2020-12-31	No
Investment advisory and management fees	2020-12-31	$45,165
Value of interest in registered invesment companies (eg mutual funds) at end of year	2020-12-31	$25,438,297
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2020-12-31	$14,881,387
Interest on participant loans	2020-12-31	$9,165
Income. Interest from loans (other than to participants)	2020-12-31	$0
Value of interest in common/collective trusts at end of year	2020-12-31	$376,942
Value of interest in common/collective trusts at beginning of year	2020-12-31	$183,140
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2020-12-31	$6,525
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2020-12-31	$3,758,260
Net investment gain or loss from common/collective trusts	2020-12-31	$11,464
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2020-12-31	No
Was there a failure to transmit to the plan any participant contributions	2020-12-31	No
Has the plan failed to provide any benefit when due under the plan	2020-12-31	No
Contributions received in cash from employer	2020-12-31	$2,081,322
Employer contributions (assets) at end of year	2020-12-31	$276,826
Employer contributions (assets) at beginning of year	2020-12-31	$1,043,284
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2020-12-31	$2,826,226
Contract administrator fees	2020-12-31	$8,779
Did the plan have assets held for investment	2020-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2020-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2020-12-31	No
Opinion of an independent qualified public accountant for this plan	2020-12-31	Disclaimer
Accountancy firm name	2020-12-31	ARMANINO
Accountancy firm EIN	2020-12-31	946214841
2019 : ATARA BIO 401(K) PLAN 2019 401k financial data
Total unrealized appreciation/depreciation of assets	2019-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2019-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2019-12-31	$0
Total income from all sources (including contributions)	2019-12-31	$9,872,137
Total loss/gain on sale of assets	2019-12-31	$0
Total of all expenses incurred	2019-12-31	$959,495
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2019-12-31	$919,895
Value of total corrective distributions	2019-12-31	$9,585
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2019-12-31	$7,617,066
Value of total assets at end of year	2019-12-31	$16,327,968
Value of total assets at beginning of year	2019-12-31	$7,415,326
Total of administrative expenses incurred including professional, contract, advisory and management fees	2019-12-31	$30,015
Total interest from all sources	2019-12-31	$4,878
Total dividends received (eg from common stock, registered investment company shares)	2019-12-31	$271,846
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2019-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2019-12-31	$271,846
Was this plan covered by a fidelity bond	2019-12-31	Yes
Value of fidelity bond cover	2019-12-31	$500,000
If this is an individual account plan, was there a blackout period	2019-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2019-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2019-12-31	No
Contributions received from participants	2019-12-31	$4,312,679
Participant contributions at end of year	2019-12-31	$220,157
Participant contributions at beginning of year	2019-12-31	$70,295
Income. Received or receivable in cash from other sources (including rollovers)	2019-12-31	$1,739,151
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2019-12-31	No
Value of net income/loss	2019-12-31	$8,912,642
Value of net assets at end of year (total assets less liabilities)	2019-12-31	$16,327,968
Value of net assets at beginning of year (total assets less liabilities)	2019-12-31	$7,415,326
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2019-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2019-12-31	No
Were any leases to which the plan was party in default or uncollectible	2019-12-31	No
Investment advisory and management fees	2019-12-31	$24,513
Value of interest in registered invesment companies (eg mutual funds) at end of year	2019-12-31	$14,881,387
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2019-12-31	$7,214,883
Interest on participant loans	2019-12-31	$4,878
Income. Interest from loans (other than to participants)	2019-12-31	$0
Value of interest in common/collective trusts at end of year	2019-12-31	$183,140
Value of interest in common/collective trusts at beginning of year	2019-12-31	$130,148
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2019-12-31	$1,973,231
Net investment gain or loss from common/collective trusts	2019-12-31	$5,116
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2019-12-31	No
Was there a failure to transmit to the plan any participant contributions	2019-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2019-12-31	No
Contributions received in cash from employer	2019-12-31	$1,565,236
Employer contributions (assets) at end of year	2019-12-31	$1,043,284
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2019-12-31	$919,895
Contract administrator fees	2019-12-31	$5,502
Did the plan have assets held for investment	2019-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2019-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2019-12-31	No
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2019-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2019-12-31	Disclaimer
Accountancy firm name	2019-12-31	ARMANINO
Accountancy firm EIN	2019-12-31	946214841
2018 : ATARA BIO 401(K) PLAN 2018 401k financial data
Total unrealized appreciation/depreciation of assets	2018-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2018-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2018-12-31	$0
Total income from all sources (including contributions)	2018-12-31	$3,880,367
Total loss/gain on sale of assets	2018-12-31	$0
Total of all expenses incurred	2018-12-31	$613,466
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2018-12-31	$589,593
Value of total corrective distributions	2018-12-31	$8,982
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2018-12-31	$4,472,244
Value of total assets at end of year	2018-12-31	$7,415,326
Value of total assets at beginning of year	2018-12-31	$4,148,425
Total of administrative expenses incurred including professional, contract, advisory and management fees	2018-12-31	$14,891
Total interest from all sources	2018-12-31	$2,581
Total dividends received (eg from common stock, registered investment company shares)	2018-12-31	$142,459
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2018-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2018-12-31	$142,459
Was this plan covered by a fidelity bond	2018-12-31	Yes
Value of fidelity bond cover	2018-12-31	$734,503
If this is an individual account plan, was there a blackout period	2018-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2018-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2018-12-31	No
Contributions received from participants	2018-12-31	$2,827,565
Participant contributions at end of year	2018-12-31	$70,295
Participant contributions at beginning of year	2018-12-31	$22,984
Income. Received or receivable in cash from other sources (including rollovers)	2018-12-31	$1,644,679
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2018-12-31	No
Value of net income/loss	2018-12-31	$3,266,901
Value of net assets at end of year (total assets less liabilities)	2018-12-31	$7,415,326
Value of net assets at beginning of year (total assets less liabilities)	2018-12-31	$4,148,425
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2018-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2018-12-31	No
Were any leases to which the plan was party in default or uncollectible	2018-12-31	No
Investment advisory and management fees	2018-12-31	$13,599
Value of interest in registered invesment companies (eg mutual funds) at end of year	2018-12-31	$7,214,883
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2018-12-31	$3,988,194
Interest on participant loans	2018-12-31	$2,581
Income. Interest from loans (other than to participants)	2018-12-31	$0
Value of interest in common/collective trusts at end of year	2018-12-31	$130,148
Value of interest in common/collective trusts at beginning of year	2018-12-31	$137,247
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2018-12-31	$-740,809
Net investment gain or loss from common/collective trusts	2018-12-31	$3,892
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2018-12-31	No
Was there a failure to transmit to the plan any participant contributions	2018-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2018-12-31	No
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2018-12-31	$589,593
Contract administrator fees	2018-12-31	$1,292
Did the plan have assets held for investment	2018-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2018-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2018-12-31	No
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2018-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2018-12-31	Disclaimer
Accountancy firm name	2018-12-31	ARMANINO
Accountancy firm EIN	2018-12-31	946214841

Form 5500 Responses for ATARA BIO 401(K) PLAN

2022: ATARA BIO 401(K) PLAN 2022 form 5500 responses
2022-01-01	Type of plan entity	Single employer plan
2022-01-01	This submission is the final filing	No
2022-01-01	Plan is a collectively bargained plan	No
2022-01-01	Plan funding arrangement – Trust	Yes
2022-01-01	Plan benefit arrangement - Trust	Yes
2021: ATARA BIO 401(K) PLAN 2021 form 5500 responses
2021-01-01	Type of plan entity	Single employer plan
2021-01-01	Submission has been amended	No
2021-01-01	This submission is the final filing	No
2021-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2021-01-01	Plan is a collectively bargained plan	No
2021-01-01	Plan funding arrangement – Trust	Yes
2021-01-01	Plan benefit arrangement - Trust	Yes
2020: ATARA BIO 401(K) PLAN 2020 form 5500 responses
2020-01-01	Type of plan entity	Single employer plan
2020-01-01	Submission has been amended	No
2020-01-01	This submission is the final filing	No
2020-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2020-01-01	Plan is a collectively bargained plan	No
2020-01-01	Plan funding arrangement – Trust	Yes
2020-01-01	Plan benefit arrangement - Trust	Yes
2019: ATARA BIO 401(K) PLAN 2019 form 5500 responses
2019-01-01	Type of plan entity	Single employer plan
2019-01-01	Submission has been amended	No
2019-01-01	This submission is the final filing	No
2019-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2019-01-01	Plan is a collectively bargained plan	No
2019-01-01	Plan funding arrangement – Trust	Yes
2019-01-01	Plan benefit arrangement - Trust	Yes
2018: ATARA BIO 401(K) PLAN 2018 form 5500 responses
2018-01-01	Type of plan entity	Single employer plan
2018-01-01	Submission has been amended	No
2018-01-01	This submission is the final filing	No
2018-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2018-01-01	Plan is a collectively bargained plan	No
2018-01-01	Plan funding arrangement – Trust	Yes
2018-01-01	Plan benefit arrangement - Trust	Yes

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Company Name:	ATARA BIOTHERAPEUTICS, INC.
Employer identification number (EIN):	460920988
NAIC Classification:	325410