Civic Intelligence

Merrimack Pharmaceuticals Inc.

Plan context: Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan

EIN 04-3210530 • Cambridge, MA • 32 filings • 3 plans

1 Kendall Square, Suite B7201Cambridge, MA 02139
Current Snapshot

Latest Year

2024

2024 Participants

21

2024 Assets

$14,454,687

2024 Contributions

$444,972

Historical Graphs

Total Assets Over Time

Aggregate end-of-year assets by filing year, excluding zero-asset years

$30,987,013$15,493,507$0200220132023YearValue
$14,454,687Latest year 2023

Participants Over Time

Largest reported end-of-year plan headcount by filing year, used to avoid double-counting participants across overlapping plans

4292150200220122022YearValue
21Latest year 2022

Company Timeline

Year summaries and individual filings are combined here so you can stay in one place while moving across years and plan filings.

Year / FilingFilingsParticipantsAssetsContributionsContrib./Participant
202410$0$0-
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-0---
202310$14,454,687$0-
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-0$14,454,687--
2022121$13,205,495$0-
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-21$13,205,495--
2021121$17,778,314$0-
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-21$17,778,314--
2020121$18,932,273$0-
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-21$18,932,273--
201910$19,345,192$444,972-
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-0$19,345,192$444,972-
2018134$22,010,465$1,276,894$37,556iApproximate average salary by contribution assumption: employee only about $938,893 at 4% or $625,928 at 6%; with 50% employer match about $625,928 at 4% or $417,286 at 6%; with 100% employer match about $469,446 at 4% or $312,964 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-34$22,010,465$1,276,894$37,556iApproximate average salary by contribution assumption: employee only about $938,893 at 4% or $625,928 at 6%; with 50% employer match about $625,928 at 4% or $417,286 at 6%; with 100% employer match about $469,446 at 4% or $312,964 at 6%.
2017267$27,694,524$2,964,471$44,246iApproximate average salary by contribution assumption: employee only about $1,106,146 at 4% or $737,431 at 6%; with 50% employer match about $737,431 at 4% or $491,620 at 6%; with 100% employer match about $553,073 at 4% or $368,715 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-67$27,694,524$2,964,471$44,246iApproximate average salary by contribution assumption: employee only about $1,106,146 at 4% or $737,431 at 6%; with 50% employer match about $737,431 at 4% or $491,620 at 6%; with 100% employer match about $553,073 at 4% or $368,715 at 6%.
Merrimack Pharmaceuticals Inc. Welfare Benefits Plan-65---
20162312$30,987,013$6,576,108$21,077iApproximate average salary by contribution assumption: employee only about $526,932 at 4% or $351,288 at 6%; with 50% employer match about $351,288 at 4% or $234,192 at 6%; with 100% employer match about $263,466 at 4% or $175,644 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-312$30,987,013$6,576,108$21,077iApproximate average salary by contribution assumption: employee only about $526,932 at 4% or $351,288 at 6%; with 50% employer match about $351,288 at 4% or $234,192 at 6%; with 100% employer match about $263,466 at 4% or $175,644 at 6%.
Merrimack Pharmaceuticals Inc. Welfare Benefits Plan-283---
20152429$25,390,084$6,895,397$16,073iApproximate average salary by contribution assumption: employee only about $401,830 at 4% or $267,886 at 6%; with 50% employer match about $267,886 at 4% or $178,591 at 6%; with 100% employer match about $200,915 at 4% or $133,943 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-429$25,390,084$6,895,397$16,073iApproximate average salary by contribution assumption: employee only about $401,830 at 4% or $267,886 at 6%; with 50% employer match about $267,886 at 4% or $178,591 at 6%; with 100% employer match about $200,915 at 4% or $133,943 at 6%.
Merrimack Pharmaceuticals Inc. Welfare Benefits Plan-371---
20142298$21,335,120$4,849,520$16,274iApproximate average salary by contribution assumption: employee only about $406,839 at 4% or $271,226 at 6%; with 50% employer match about $271,226 at 4% or $180,817 at 6%; with 100% employer match about $203,419 at 4% or $135,613 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-298$21,335,120$4,849,520$16,274iApproximate average salary by contribution assumption: employee only about $406,839 at 4% or $271,226 at 6%; with 50% employer match about $271,226 at 4% or $180,817 at 6%; with 100% employer match about $203,419 at 4% or $135,613 at 6%.
Merrimack Pharmaceuticals Inc. Welfare Benefits Plan-288---
20132266$16,649,371$3,015,868$11,338iApproximate average salary by contribution assumption: employee only about $283,446 at 4% or $188,964 at 6%; with 50% employer match about $188,964 at 4% or $125,976 at 6%; with 100% employer match about $141,723 at 4% or $94,482 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-266$16,649,371$3,015,868$11,338iApproximate average salary by contribution assumption: employee only about $283,446 at 4% or $188,964 at 6%; with 50% employer match about $188,964 at 4% or $125,976 at 6%; with 100% employer match about $141,723 at 4% or $94,482 at 6%.
Merrimack Pharmaceuticals Inc. Welfare Benefits Plan-245---
20122251$11,604,050$2,551,084$10,164iApproximate average salary by contribution assumption: employee only about $254,092 at 4% or $169,395 at 6%; with 50% employer match about $169,395 at 4% or $112,930 at 6%; with 100% employer match about $127,046 at 4% or $84,697 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-251$11,604,050$2,551,084$10,164iApproximate average salary by contribution assumption: employee only about $254,092 at 4% or $169,395 at 6%; with 50% employer match about $169,395 at 4% or $112,930 at 6%; with 100% employer match about $127,046 at 4% or $84,697 at 6%.
Merrimack Pharmaceuticals Inc. Welfare Benefits Plan-229---
20112231$8,226,287$2,502,959$10,835iApproximate average salary by contribution assumption: employee only about $270,883 at 4% or $180,589 at 6%; with 50% employer match about $180,589 at 4% or $120,392 at 6%; with 100% employer match about $135,442 at 4% or $90,294 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-231$8,226,287$2,502,959$10,835iApproximate average salary by contribution assumption: employee only about $270,883 at 4% or $180,589 at 6%; with 50% employer match about $180,589 at 4% or $120,392 at 6%; with 100% employer match about $135,442 at 4% or $90,294 at 6%.
Merrimack Pharmaceuticals Inc. Welfare Benefits Plan-211---
20102187$6,244,824$2,085,620$11,153iApproximate average salary by contribution assumption: employee only about $278,826 at 4% or $185,884 at 6%; with 50% employer match about $185,884 at 4% or $123,923 at 6%; with 100% employer match about $139,413 at 4% or $92,942 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-187$6,244,824$2,085,620$11,153iApproximate average salary by contribution assumption: employee only about $278,826 at 4% or $185,884 at 6%; with 50% employer match about $185,884 at 4% or $123,923 at 6%; with 100% employer match about $139,413 at 4% or $92,942 at 6%.
Merrimack Pharmaceuticals Inc. Welfare Benefits Plan-168---
20092122$3,654,328$1,209,655$9,915iApproximate average salary by contribution assumption: employee only about $247,880 at 4% or $165,253 at 6%; with 50% employer match about $165,253 at 4% or $110,169 at 6%; with 100% employer match about $123,940 at 4% or $82,627 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-118$3,654,328$1,209,655$10,251iApproximate average salary by contribution assumption: employee only about $256,283 at 4% or $170,855 at 6%; with 50% employer match about $170,855 at 4% or $113,903 at 6%; with 100% employer match about $128,141 at 4% or $85,428 at 6%.
Merrimack Pharmaceuticals Inc. Welfare Benefits Plan-122---
20081107$0$0-
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-107---
2007176$1,527,918$549,179$7,226iApproximate average salary by contribution assumption: employee only about $180,651 at 4% or $120,434 at 6%; with 50% employer match about $120,434 at 4% or $80,289 at 6%; with 100% employer match about $90,325 at 4% or $60,217 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-76$1,527,918$549,179$7,226iApproximate average salary by contribution assumption: employee only about $180,651 at 4% or $120,434 at 6%; with 50% employer match about $120,434 at 4% or $80,289 at 6%; with 100% employer match about $90,325 at 4% or $60,217 at 6%.
2006150$1,103,294$349,263$6,985iApproximate average salary by contribution assumption: employee only about $174,632 at 4% or $116,421 at 6%; with 50% employer match about $116,421 at 4% or $77,614 at 6%; with 100% employer match about $87,316 at 4% or $58,211 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-50$1,103,294$349,263$6,985iApproximate average salary by contribution assumption: employee only about $174,632 at 4% or $116,421 at 6%; with 50% employer match about $116,421 at 4% or $77,614 at 6%; with 100% employer match about $87,316 at 4% or $58,211 at 6%.
2005141$747,689$249,073$6,075iApproximate average salary by contribution assumption: employee only about $151,874 at 4% or $101,249 at 6%; with 50% employer match about $101,249 at 4% or $67,499 at 6%; with 100% employer match about $75,937 at 4% or $50,625 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-41$747,689$249,073$6,075iApproximate average salary by contribution assumption: employee only about $151,874 at 4% or $101,249 at 6%; with 50% employer match about $101,249 at 4% or $67,499 at 6%; with 100% employer match about $75,937 at 4% or $50,625 at 6%.
2004131$461,088$223,770$7,218iApproximate average salary by contribution assumption: employee only about $180,460 at 4% or $120,306 at 6%; with 50% employer match about $120,306 at 4% or $80,204 at 6%; with 100% employer match about $90,230 at 4% or $60,153 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-31$461,088$223,770$7,218iApproximate average salary by contribution assumption: employee only about $180,460 at 4% or $120,306 at 6%; with 50% employer match about $120,306 at 4% or $80,204 at 6%; with 100% employer match about $90,230 at 4% or $60,153 at 6%.
2003120$203,080$94,389$4,719iApproximate average salary by contribution assumption: employee only about $117,986 at 4% or $78,658 at 6%; with 50% employer match about $78,658 at 4% or $52,438 at 6%; with 100% employer match about $58,993 at 4% or $39,329 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-20$203,080$94,389$4,719iApproximate average salary by contribution assumption: employee only about $117,986 at 4% or $78,658 at 6%; with 50% employer match about $78,658 at 4% or $52,438 at 6%; with 100% employer match about $58,993 at 4% or $39,329 at 6%.
2002111$93,885$93,825$8,530iApproximate average salary by contribution assumption: employee only about $213,239 at 4% or $142,159 at 6%; with 50% employer match about $142,159 at 4% or $94,773 at 6%; with 100% employer match about $106,619 at 4% or $71,080 at 6%.
Merrimack Pharmaceuticals Inc. 401(K) Retirement Plan-11$93,885$93,825$8,530iApproximate average salary by contribution assumption: employee only about $213,239 at 4% or $142,159 at 6%; with 50% employer match about $142,159 at 4% or $94,773 at 6%; with 100% employer match about $106,619 at 4% or $71,080 at 6%.