Korro Bio Inc401(k)
KORRO BIO 401K RETIREMENT PLAN · CAMBRIDGE, MA · plan year 2025
Peer grade: A · admin costs + employer contributions vs same-size plans · how grading works
Korro Bio Inc reported $4,113 in plan administrative expenses for 2025: 0.05% of average plan assets, lower than ~75% of peers. Employer contributions averaged $10,704 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 0.03% to 0.05%. The plan sits in the $1M–$10M size bracket, benchmarked here against 809 comparable plans and shown alongside other professional & technical services employers. By assets it is among the smaller plans on file in Massachusetts (1,983rd of 2,726), and 8,371st of 11,654 in professional & technical services. In 2025, employees put in $2.24 for every $1.00 the employer contributed.
Korro Bio Inc's 2025 employer contribution ran above the $1,464 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.
Annual cost at the plan's reported 2025 administrative ratio, against the median plan its size; fund expense ratios are extra. Compare any plan.
Compensation shown is direct payments from plan assets reported on Schedule C. Providers paid through fund revenue-sharing appear as indirect.
Looking for an account from a past job here? How to find an old 401(k).
Why are you looking at this plan?
Source: U.S. Department of Labor, Form 5500 series, EIN 831934068 · Verify on EFAST2 · Amounts are as reported by the plan sponsor for the plan year shown.