Mersana Therapeutics, INC.: final filing for its 401(k) plan, 184 participants (Cambridge, MA)
Mersana Therapeutics, INC. (Cambridge, Massachusetts): final filing for its 401(k) plan, 184 participants (Cambridge, MA). Its participants of 184 is below the median of 294 (31st percentile). Dated 21 days ago, it is in the active follow-up window. Score 85/100. As of 2026-11-04, from U.S. Department of Labor EBSA Form 5500 filings (current plan-year dataset).
Data as of · Compiled by Zalwin from U.S. Department of Labor EBSA Form 5500 filings (current plan-year dataset)
participants: 184 · 31th percentile of 126,658 BenefitPlanPulse records · 0.6x the median
Free preview: all 11 published fields of this record are shown below. Locked: 499 related MA BenefitPlanPulse records and the 6-column CSV export.
| Field | Value |
|---|---|
| Employer (plan sponsor) | Mersana Therapeutics, INC. |
| EIN | 043562403 |
| Plan | Mersana Therapeutics, INC. 401(k) Profit Sharing Plan Trust |
| Plan type | 401(k) |
| Trigger | Final filing (plan terminating or merging) |
| Participants | 184 |
| Industry | Professional services |
| Location | Cambridge, MA |
| Plan effective | 2006-01-01 |
| Plan year | 2026 |
| Filed | 2026-10-14 |
| participants percentile | 31th of 126,658 (median 294, 0.6x median) |
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CSV columns: Employer · Plan · Trigger · Participants · State · Filed · official source URL
- Source agency: U.S. Department of Labor EBSA Form 5500 filings (current plan-year dataset)
- Record date: 2026-10-14
- Data refreshed: 2026-11-04
- Refunds on request within 14 days
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LIVE PUBLIC DATA Source: U.S. Department of Labor EBSA Form 5500 filings (current plan-year dataset) · Last refreshed: Wed, 04 Nov 2026 01:39:03 GMT
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Peer benchmark and outreach value: Mersana Therapeutics, INC. and 4,044 Massachusetts peers
- Massachusetts BenefitPlanPulse records like this one: 4,044
- Mersana Therapeutics, INC.'s participants: 31st percentile of 126,658 records
- Timing: Medium: dated in the last 30 days
- Estimated pipeline if you contact every Massachusetts peer: $808,800 (peers × rate × deal size; an estimate from your assumptions, not a forecast)
85 / 100 Score
- Filed in the last 30 days.
- Final filing: plan ending or merging.
- 184 participants.
- 401(k) plan.
What is the BenefitPlanPulse record for Mersana Therapeutics, INC. in Cambridge, Massachusetts?
Mersana Therapeutics, INC. filed a Form 5500 for its 401(k) plan (final filing (plan terminating or merging)) with 184 participants on 2026-10-14.
How does Mersana Therapeutics, INC. compare to other Massachusetts BenefitPlanPulse records?
Its participants of 184 is below the median (31th percentile); smaller records often move faster and face less competition. It is 21 days old, still within a typical 45-day follow-up window. Its Score of 85/100 puts it among the stronger signals in this feed.
Mersana Therapeutics, INC. vs. top 3 peers
| Organization | Location | Amount | Percentile | Record date |
|---|---|---|---|---|
| Mersana Therapeutics, INC. | Cambridge, MA | 184 | 31st | 2026-10-14 |
| Cummings Resources, LLC | Nashville, TN | 191 | 33rd | 2026-10-21 |
| Accumark, INC. | Mission Viejo, CA | 171 | 27th | 2026-10-22 |
| Nw Natural Water Company LLC | Portland, OR | 219 | 38th | 2026-10-23 |
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BenefitPlanPulse: Final filing (plan terminating or merging) BenefitPlanPulse: 401(k) BenefitPlanPulse: records in Massachusetts
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From public Form 5500 filings released by the U.S. Department of Labor. Employer and plan level only: we never list signers, contacts or participants. A final filing can mean a termination, merger or transfer; read the filing on EFAST.