401(k) · DOL Form 5500 · 2024

Atara Biotherapeutics, Inc. 401(k) Plan

Data updated 2026-08-25

$49M
Total assets Below avg plan size
242
Participants Below avg headcount
84th
Percentile by assets National rank
$202,130
Avg per participant Above avg balance/head
PlainRetire home → About this data RSS: change history

Official DOL plan name: Atara Bio 401(k) Plan · Sponsored by Atara Biotherapeutics, Inc. · California · Manufacturing

$49M in assets, 242 participants

Atara Biotherapeutics, Inc.'s Atara Bio 401(k) Plan reported $49M in total assets and 242 participants in its 2024 DOL Form 5500 filing, ranking in the 84th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #13,706 in Manufacturing (17,777 peers)

Coverage in California

Atara Bio 401(k) Plan covers 242 participants in California, about 38% of the average California filer (state average ~630 per filing). Assets: $49M.

#13,706
in Manufacturing (17,777 peers)
+2.3%
assets growth YoY
0.5×
vs typical plan assets (national mean)

Atara Bio 401(k) Plan's outsized position by total assets

Atara Bio 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$48,915,447 Top 16% higher than 84% of 123,620 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024

Atara Bio 401(k) Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Atara Bio 401(k) Plan sits mid-pack in the medium band (242 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Atara Bio 401(k) Plan reported net income fell from $11M in the plan year 2023 filing to $1M in the plan year 2024 filing.
  • Atara Bio 401(k) Plan reported participants fell from 336 in the plan year 2023 filing to 242 in the plan year 2024 filing.
  • Atara Bio 401(k) Plan end-of-year assets rose from $48M in the plan year 2023 filing to $49M in the plan year 2024 filing.

See the national 2023→2024 release diff →

Plan-year Form 5500 strip

Filing strip 460920988 · Atara Biotherapeutics, Inc. PY 2024 · 401(k)

Atara Bio 401(k) Plan · $49M · 242 · 84th

  • 5500 $49M
  • ASSETS 242
  • PCT 84th
  • EIN 401(k)
  • RANK near Aer Mfg., Inc. Retirement Savings Plan and Trust
  • PHOTO ind #13706

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Manufacturing retirement plans → · Plans in California →

Atara Bio 401(k) Plan in the asset neighbourhood

Atara Bio 401(k) Plan$49MCws Savings Plan (401(k))$49MBetts Industries, Inc. 401(k) PlanBetts Industries, Inc. 401(k…$49MAer Mfg., Inc. Retirement Savings Plan and TrustAer Mfg., Inc. Retirement Sa…$49MHarkins Administrative Services, Inc. 401(k) Profit Sharing PlanHarkins Administrative Servi…$49M
End-of-year total assets ($M) among Atara Bio 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

California filing particulars

Total Assets (Beginning of Year)$48M
Net Assets (End of Year)$49M
Net Income$1M
Employer EIN460920988
Plan Effective Date2015-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Atara Biotherapeutics, Inc.)

Sponsor-wide plan assets over time

All Atara Biotherapeutics, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$49M 33.06860137187129% vs 2022
2024 filing year
$35M$40M$45M$50M$55M 202220232024 $36.8M $48.9M ▲ +33.1%
Year Plans Participants Total Assets
2022 1 575 $37M
2023 1 336 $48M
2024 1 242 $49M

Nearby 401(k) Plans in California

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Atara Bio 401(k) Plan vs. nearby 401(k) plans in California, assets vs. participants Scatter plot of 6 data points. -50000050000100000150000 -200204060 Total assets ($B) Participants Atara Bio 401(k) Plan, Total assets ($B): 0.048915447 · Participants: 242Atara Bio 401(k) PlanGoogle LLC 401(k) Savings Plan, Total assets ($B): 48.738057415 · Participants: 116712Google LLC 401(k) Savings PlanOracle Corporation 401(k) Savings and Investment Plan, Total assets ($B): 31.02646504 · Participants: 58962Oracle Corporation 401(k) Savings and Investment PlanIntel 401(k) Savings Plan, Total assets ($B): 24.850880304 · Participants: 55298Intel 401(k) Savings PlanApple 401(k) Plan, Total assets ($B): 24.714519387 · Participants: 101450Apple 401(k) PlanCisco Systems,Inc. 401(k) Plan, Total assets ($B): 22.728425546 · Participants: 40452Cisco Systems,Inc. 401(k) Plan
Atara Bio 401(k) Plan vs. nearby 401(k) plans in California, assets vs. participants
Compare Atara Bio 401(k) Plan side-by-side with 3 peers →

Atara Bio 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside California, the nearest 401(k) by assets is Aer Mfg., Inc. Retirement Savings Plan and Trust in TX ($49M); by covered participants it is Venus Construction Company 401 (K) Plan in TX (242 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (242 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Atara Bio 401(k) Plan assets move in 2024? ▼
Atara Bio 401(k) Plan edged up modestly - up 2.3% during 2024, from $48M to $49M. Reported net income was $1M.
How have Atara Biotherapeutics, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Atara Biotherapeutics, Inc.'s sponsor-wide assets grew 33.1%, from $37M to $49M.
Where does Atara Bio 401(k) Plan rank by assets among Form 5500 filers? ▼
Atara Bio 401(k) Plan ranks in the 84th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to Atara Bio 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Aer Mfg., Inc. Retirement Savings Plan and Trust in TX ($49M, 762 participants).
Which 401(k) plans cover a similar participant headcount to Atara Bio 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Venus Construction Company 401 (K) Plan in TX (242 participants, $3M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 460920988.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.