401(k) · DOL Form 5500 · 2024

Sutro Biopharma, Inc. 401(k) Plan

Data updated 2026-08-25

$44M
Total assets Below avg plan size
324
Participants Below avg headcount
83rd
Percentile by assets National rank
$135,498
Avg per participant Near avg balance/head
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Official DOL plan name: Sutro Biopharma, Inc. 401(k) Plan · Sponsored by Sutro Biopharma, Inc. · California · Professional & Technical Services

$44M in assets, 324 participants

Sutro Biopharma, Inc.'s Sutro Biopharma, Inc. 401(k) Plan reported $44M in total assets and 324 participants in its 2024 DOL Form 5500 filing, ranking in the 83rd 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.

  • #16,791 in Professional & Technical Services (20,173 peers)

Where Sutro Biopharma, Inc. 401(k) Plan sits by assets

Sutro Biopharma, Inc. 401(k) Plan sits in the top quartile of all filed plans by assets, $44M for 324 participants (~$135,498/participant), up 39.5% in 2024.

#16,791
in Professional & Technical Services (20,173 peers)
+39.5%
assets growth YoY
0.4×
vs typical plan assets (national mean)

Sutro Biopharma, Inc. 401(k) Plan's outsized position by total assets

Sutro Biopharma, Inc. 401(k) Plan vs every filed plan by assets

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

$43,901,389 Top 17% higher than 83% 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

Sutro Biopharma, Inc. 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. Sutro Biopharma, Inc. 401(k) Plan sits mid-pack in the medium band (324 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Sutro Biopharma, Inc. 401(k) Plan end-of-year assets rose from $31M in the plan year 2023 filing to $44M in the plan year 2024 filing.
  • Sutro Biopharma, Inc. 401(k) Plan reported net income rose from $11M in the plan year 2023 filing to $12M in the plan year 2024 filing.
  • Sutro Biopharma, Inc. 401(k) Plan reported participants rose from 288 in the plan year 2023 filing to 324 in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 470926186 · Sutro Biopharma, Inc. PY 2024 · 401(k)

Sutro Biopharma, Inc. 401(k) Plan · $44M · 324 · 83rd

  • PCT $44M
  • EIN 324
  • RANK 83rd
  • PHOTO 401(k)
  • IND near King Industries, Inc. 401(k) Retirement Plan
  • EOY ind #16791

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 Professional & Technical Services retirement plans → · Plans in California →

Sutro Biopharma, Inc. 401(k) Plan in the asset neighbourhood

Beretta U.S.a. Corporation 401(k) & Profit Sharing PlanBeretta U.S.a. Corporation 4…$44MSutro Biopharma, Inc. 401(k) PlanSutro Biopharma, Inc. 401(k)…$44MKing Industries, Inc. 401(k) Retirement PlanKing Industries, Inc. 401(k)…$44MTranstar, LLC Savings Plan$44MConsumers Credit Union 401(k) Plan and TrustConsumers Credit Union 401(k…$44M
End-of-year total assets ($M) among Sutro Biopharma, Inc. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Scale-class filing particulars (2024)

Total Assets (Beginning of Year)$31M
Net Assets (End of Year)$44M
Net Income$12M
Employer EIN470926186
Plan Effective Date2008-04-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Sutro Biopharma, Inc.)

Sponsor-wide plan assets over time

All Sutro Biopharma, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$44M 112.99070730083815% vs 2022
2024 filing year
$10M$20M$30M$40M$50M 202220232024 $20.6M $43.9M ▲ +113.0%
Year Plans Participants Total Assets
2022 1 239 $21M
2023 1 288 $31M
2024 1 324 $44M

Nearby 401(k) Plans in California

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

Sutro Biopharma, Inc. 401(k) Plan vs. nearby 401(k) plans in California, assets vs. participants Scatter plot of 6 data points. -50000050000100000150000 -200204060 Total assets ($B) Participants Sutro Biopharma, Inc. 401(k) Plan, Total assets ($B): 0.043901389 · Participants: 324Sutro Biopharma, Inc. 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
Sutro Biopharma, Inc. 401(k) Plan vs. nearby 401(k) plans in California, assets vs. participants
Compare Sutro Biopharma, Inc. 401(k) Plan side-by-side with 3 peers →

Sutro Biopharma, Inc. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside California, the nearest 401(k) by assets is King Industries, Inc. 401(k) Retirement Plan in CT ($44M); by covered participants it is Austin Emergency Center LLC 401(k) Profit Sharing & Trust in TX (324 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (324 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 Sutro Biopharma, Inc. 401(k) Plan assets move in 2024? ▼
Sutro Biopharma, Inc. 401(k) Plan surged - up 39.5% during 2024, from $31M to $44M. Reported net income was $12M.
How have Sutro Biopharma, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Sutro Biopharma, Inc.'s sponsor-wide assets grew 113.0%, from $21M to $44M.
Where does Sutro Biopharma, Inc. 401(k) Plan rank by assets among Form 5500 filers? ▼
Sutro Biopharma, Inc. 401(k) Plan ranks in the 83rd 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 Sutro Biopharma, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is King Industries, Inc. 401(k) Retirement Plan in CT ($44M, 240 participants).
Which 401(k) plans cover a similar participant headcount to Sutro Biopharma, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Austin Emergency Center LLC 401(k) Profit Sharing & Trust in TX (324 participants, N/A 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 470926186.

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.