401(k) · DOL Form 5500 · 2022

Merrimack Pharmaceuticals, Inc. 401(k) Plan

Data updated 2026-08-25

$13M
Total assets Small plan by assets
21
Participants Small participant base
70th
Percentile by assets National rank
$628,833
Avg per participant High balance/head
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Official DOL plan name: Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan · Sponsored by Merrimack Pharmaceuticals, Inc. · Massachusetts · Manufacturing

$13M in assets, 21 participants

Merrimack Pharmaceuticals, Inc.'s Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan reported $13M in total assets and 21 participants in its 2022 DOL Form 5500 filing, ranking in the 70th 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.

  • #12,180 in Manufacturing (20,602 peers)

Merrimack Pharmaceuticals, Inc. multi-year trail

Merrimack Pharmaceuticals, Inc.'s plans moved -96.5% in assets from 2022 to 2024; this filing shows Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan at $13M / 21 participants.

#12,180
in Manufacturing (20,602 peers)
-25.7%
assets change YoY

The plan reported a net loss of $5M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.

Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan's outsized position by total assets

Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan vs every filed plan by assets

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

$13,205,495 Top 30% higher than 70% 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

Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan among smaller filed plans by headcount

Plan-year 2022 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan is a small filing (21 participants) on this national headcount ladder.

Published 5500 schedule card

Filing strip 043210530 · Merrimack Pharmaceuticals, Inc. PY 2022 · 401(k)

Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan · $13M · 21 · 70th

  • VS-ST $13M
  • BOY 21
  • SCH 70th
  • EBSA 401(k)
  • PART near Southeast Financial Credit Union 401(k) Plan and Trust
  • TYPE ind #12180

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 Massachusetts →

Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan in the asset neighbourhood

Merrimack Pharmaceuticals, Inc. 401(k) Retirement PlanMerrimack Pharmaceuticals, I…$13MSoutheast Financial Credit Union 401(k) Plan and TrustSoutheast Financial Credit U…$13MSun Pacific 401(k) Retirement Savings PlanSun Pacific 401(k) Retiremen…$13MNorth Ottawa Community Hospital 401(k) Retirement PlanNorth Ottawa Community Hospi…$13MF.L. Crane & Sons, Inc. 401(k) PlanF.L. Crane & Sons, Inc. 401(…$13M
End-of-year total assets ($M) among Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2022.

Merrimack Pharmaceuticals, Inc. multi-year asset trail

Sponsor-wide plan assets over time

All Merrimack Pharmaceuticals, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$465K 96.48195694292414% vs 2022
2024 filing year
$0M$5M$10M$15M$20M 202220232024 $13.2M $0.46M ▼ -96.5%
Year Plans Participants Total Assets
2022 1 21 $13M
2023 1 21 $14M
2024 2 N/A $465K

Merrimack Pharmaceuticals, Inc. filing trail (2022)

Total Assets (Beginning of Year)$18M
Net Assets (End of Year)$13M
Net Income-$5M
Employer EIN043210530
Plan Effective Date2002-01-01
Filing StatusFILING RECEIVED

Nearby 401(k) Plans in Massachusetts

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

Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -200000200004000060000 -100102030 Total assets ($B) Participants Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan, Total assets ($B): 0.013205495 · Participants: 21Merrimack Pharmaceuticals, Inc. 401(k) Retirement PlanFidelity 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
Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan side-by-side with 3 peers →

Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Southeast Financial Credit Union 401(k) Plan and Trust in TN ($13M); by covered participants it is Aj's Recycling Services, Inc. 401(k) Plan in MI (21 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (21 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 Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan assets move in 2022? ▼
Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan declined sharply - down 25.7% during 2022, from $18M to $13M. Reported net income was -$5M.
How have Merrimack Pharmaceuticals, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Merrimack Pharmaceuticals, Inc.'s sponsor-wide assets declined 96.5%, from $13M to $465K.
Which 401(k) plans are similar in size to Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan? ▼
Among 401(k) plans in other states, the closest by assets is Southeast Financial Credit Union 401(k) Plan and Trust in TN ($13M, 111 participants).
Which 401(k) plans cover a similar participant headcount to Merrimack Pharmaceuticals, Inc. 401(k) Retirement Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Aj's Recycling Services, Inc. 401(k) Plan in MI (21 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 043210530.

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.