401(k) · DOL Form 5500 · 2022

Mersana Therapeutics, Inc. 401(k) Plan

Data updated 2026-08-25

$22M
Total assets Small plan by assets
163
Participants Small participant base
79th
Percentile by assets National rank
$134,879
Avg per participant Near avg balance/head
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Official DOL plan name: Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust · Sponsored by Mersana Therapeutics, Inc. · Massachusetts · Professional & Technical Services

$22M in assets, 163 participants

Mersana Therapeutics, Inc.'s Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust reported $22M in total assets and 163 participants in its 2022 DOL Form 5500 filing, ranking in the 79th 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.

  • #17,024 in Professional & Technical Services (21,562 peers)

Coverage in Massachusetts

Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust covers 163 participants in Massachusetts, about 25% of the average Massachusetts filer (state average ~659 per filing). Assets: $22M.

#17,024
in Professional & Technical Services (21,562 peers)
+9.3%
assets growth YoY
0.2×
vs typical plan assets (national mean)

Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust's outsized position by total assets

Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust vs every filed plan by assets

End-of-year total assets · plan year 2022 · DOL Form 5500

$21,985,295 Top 21% higher than 79% of 139,123 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 2022

Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust among mid-size filed plans by headcount

Plan-year 2022 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust sits mid-pack in the medium band (163 participants).

EBSA filing schedule strip

Filing strip 043562403 · Mersana Therapeutics, Inc. PY 2022 · 401(k)

Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust · $22M · 163 · 79th

  • TYPE $22M
  • TYPE 163
  • TYPE 79th
  • TYPE 401(k)
  • TYPE near The Villages Charter School, Inc Employees Savings Plan
  • TYPE ind #17024

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 Massachusetts →

Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust in the asset neighbourhood

Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan TrustMersana Therapeutics, Inc. 4…$22MThe Villages Charter School, Inc Employees Savings PlanThe Villages Charter School,…$22MResearch Products Corporation Production Staff 401(k) Savings PlanResearch Products Corporatio…$22MDigital Currency Group Inc. 401(k) PlanDigital Currency Group Inc. …$22MDigital Currency Group Inc. 401(k) PlanDigital Currency Group Inc. …$22M
End-of-year total assets ($M) among Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2022.

Massachusetts filing particulars

Total Assets (Beginning of Year)$20M
Net Assets (End of Year)$22M
Net Income$2M
Employer EIN043562403
Plan Effective Date2006-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Mersana Therapeutics, Inc.)

Sponsor-wide plan assets over time

All Mersana Therapeutics, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$32M 43.43299919332445% vs 2022
2024 filing year
$20M$25M$30M$35M 202220232024 $22M $31.5M ▲ +43.4%
Year Plans Participants Total Assets
2022 1 163 $22M
2023 1 231 $29M
2024 1 122 $32M

Nearby 401(k) Plans in Massachusetts

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

Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -200000200004000060000 -100102030 Total assets ($B) Participants Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust, Total assets ($B): 0.021985295 · Participants: 163Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan TrustFidelity Retirement Savings Plan, Total assets ($B): 22.953563448 · Participants: 52036Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 8.79802945 · Participants: 32843Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 5.810585521 · Participants: 13690Massachusetts Institute of Technology Supplemental 401(k) PlanPhilips North America 401(k) Plan, Total assets ($B): 5.180251859 · Participants: 19750Philips North America 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 4.853752256 · Participants: 18359Boston Scientific Corporation 401(k) Retirement Savings Plan
Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust side-by-side with 3 peers →

Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is The Villages Charter School, Inc Employees Savings Plan in FL ($22M); by covered participants it is Orchid Underwriters Agency 401(k) Plan in FL (163 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (163 participants); asset peers above are excluded.

DOL Form 5500 plan year 2022. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust assets move in 2022? ▼
Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust grew at a solid clip - up 9.3% during 2022, from $20M to $22M. Reported net income was $2M.
How have Mersana Therapeutics, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Mersana Therapeutics, Inc.'s sponsor-wide assets grew 43.4%, from $22M to $32M.
Where does Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust rank by assets among Form 5500 filers? ▼
Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust ranks in the 79th percentile by end-of-year assets among 139,126 plans that reported assets for plan year 2022 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust? ▼
Among 401(k) plans in other states, the closest by assets is The Villages Charter School, Inc Employees Savings Plan in FL ($22M, 338 participants).
Which 401(k) plans cover a similar participant headcount to Mersana Therapeutics, Inc. 401(k) Profit Sharing Plan Trust? ▼
Among 401(k) plans in other states, the closest by covered participants is Orchid Underwriters Agency 401(k) Plan in FL (163 participants, N/A in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2022.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 043562403.

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.