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  2. Day One Biopharmaceuticals, Inc.
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Filings through Oct 24, 2026.

Day One Biopharmaceuticals, Inc.

EIN 83-2415215-biotechnology-Latest filing 2025
Plans
2
Retirement
1
$26.2M assets
Health & Benefits
1
$4.7M premiums
Participants
409
1800 SIERRA POINT PARKWAY,, SUITE 200 - BRISBANE, CA 94005650-484-0899dayonebio.comLinkedIn51-200 employeesbiotechnology
Plans on this EIN
2 filings
#001401(k)-$26.2M - 224 part#501Fully insured-$4.7M - 502 lives

Health & Benefits portfolio - carriers, brokers and premium across this company's health and benefits plan.

Benefits portfolio analytics

1 plan / $4.7M premiums / 502 covered lives

Coverage by line

Premium dollars by benefit type (bundled lines overlap)

  • Health$4.0M
  • Prescription drug$4.0M
  • Dental$328K
  • Life$269K
  • Short-term disability$269K
  • Long-term disability$269K
  • +2 more
Total $4.7M8 rows
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Plan summaries

Each card links to its plan page. The plan page shows fees vs peers, audit grade, history and counterparties.

Retirement#001

DAY ONE BIOPHARMACEUTICALS 401(K) PLAN

401(k)

Assets$26.2M
Participants224
On the plan page
Fees vs peersAudit gradeAsset trajectoryContributionsSch C providers
Open plan
Health & Benefits#501

DAY ONE BIOPHARMACEUTICALS EMPLOYEE HEALTH AND WELFARE BENEFITS PLAN

Fully insured - CALIFORNIA PHYSICIANS SERVICE

Premiums$4.7M
Covered lives502
On the plan page
Premium breakdownCarriersBrokersCoverage stats
Open plan

Retirement plans

1 plan on this EIN

PlanNameTypeAssetsParticipantsLatest year
#001DAY ONE BIOPHARMACEUTICALS 401(K) PLAN401(k)$26.2M2242025
  • DAY ONE BIOPHARMACEUTICALS 401(K) PLAN$26.2M
    #001 · 401(k) · 2025224

Health & Benefits plans

1 plan on this EIN

PlanNameFundingCarrierPremiumsCoveredLatest year
#501DAY ONE BIOPHARMACEUTICALS EMPLOYEE HEALTH AND WELFARE BENEFITS PLANFully insuredCALIFORNIA PHYSICIANS SERVICE$4.7M5022025
  • DAY ONE BIOPHARMACEUTICALS EMPLOYEE HEALTH AND WELFARE BENEFITS PLAN$4.7M
    #501 · Fully insured · CALIFORNIA PHYSICIANS SERVICE · 2025502
Retirement plans
Health & Benefits plans

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