Plan Ledger DOL Form 5500 · updated monthly

Prime Medicine, Inc.401(k)

PRIME MEDICINE, INC. 401(K) RETIREMENT PLAN · CAMBRIDGE, MA · plan year 2024

Reported admin expense ratio · 2024
0.27%

Peer grade: A- · admin costs + employer contributions vs same-size plans · how grading works

Prime Medicine, Inc. reported $35,055 in plan administrative expenses for 2024: 0.27% of average plan assets, below the peer median. Employer contributions averaged $5,861 per active participant. This ratio covers administrative expenses reported on the plan's Schedule H only; fund-level expense ratios are not included in public structured data — see methodology.

Across the 1 year on file its reported administrative ratio rose from 0.23% to 0.27%. The plan sits in the $10M–$50M size bracket, benchmarked here against 27,838 comparable plans and shown alongside other professional & technical services employers. By assets it is among the smaller plans on file in Massachusetts (1,471st of 2,726), and 6,216th of 11,654 in professional & technical services. In 2024, employees put in $3.07 for every $1.00 the employer contributed.

Plan summary
Net assets, end of year$16,604,024
Participants with balances266
Active participants213
Employer contributions$1,248,403
Employee contributions$3,832,669
Employer contribution per active participant$5,861
Average account balance$62,421
Benefits paid to participants$811,666
Plan auditUnmodified (clean) audit opinion
Plan history2
Yearassets · accounts · employer contribution
2024$16.6M · 266 accts · $1.2M emplr
2023$9.7M · 249 accts · $1.0M emplr
Administrative expenses, itemized · 2024
Recordkeeping & contract admin$2,510
Investment management$32,545
Total administrative$35,055
The Prime Medicine, Inc. 401(k) match · 2024
Employer contribution per active participant$5,861
Median for plans this size$2,416
2024$5,861 per active participant
2023$4,504 per active participant

Prime Medicine, Inc.'s 2024 employer contribution ran above the $2,416 median for plans its size, placing it in the top quarter of its peers. Filings report dollars actually contributed, not the match formula; the formula itself (for example, 50% of the first 6% of pay) lives in the plan's summary plan description from HR.

What these fees cost you

Annual cost at the plan's reported 2024 administrative ratio, against the median plan its size; fund expense ratios are extra. Compare any plan.

Service providers · 20243
MMA SECURITIES, LLC · Recordkeeping · Trustee$32,545
ADP, INC. · Loan processing · Recordkeeping$2,510
ADP BROKER-DEALERindirect comp

Compensation shown is direct payments from plan assets reported on Schedule C. Providers paid through fund revenue-sharing appear as indirect.

Recordkeeper by year2
2024ADP, MMA SECURITIES, LLC
2023ADP, MMA SECURITIES, LLC

Looking for an account from a past job here? How to find an old 401(k).

Administrative cost history2
2024$35,055 · 0.27%
2023$15,044 · 0.23%
Same employer
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Source: U.S. Department of Labor, Form 5500 series, EIN 843097762 · Verify on EFAST2 · Amounts are as reported by the plan sponsor for the plan year shown.