Company

BlossomHill Therapeutics, Inc.

BLSM · CIK 0001839970

SEC FORM 4

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Acquisition (code C) of 1,039,996 shares; price not stated (see filing).

Reporting Persons ORBIMED ADVISORS LLC · OrbiMed Capital GP VIII LLC · Transaction Code C

Traded Aug 10, 2026 · Disclosed Aug 12, 2026

Source: SEC Form 4 · 0000947871-26-000784 · filed 2026-08-12 · View filing →

SEC FORM 4

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Acquisition (code C) of 1,049,283 shares; price not stated (see filing).

Reporting Persons ORBIMED ADVISORS LLC · OrbiMed Capital GP VIII LLC · Transaction Code C

Traded Aug 10, 2026 · Disclosed Aug 12, 2026

Source: SEC Form 4 · 0000947871-26-000784 · filed 2026-08-12 · View filing →

SEC FORM 4

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Acquisition (code C) of 1,039,996 shares; price not stated (see filing).

Reporting Person GORDON CARL L · Transaction Code C

Traded Aug 10, 2026 · Disclosed Aug 12, 2026

Source: SEC Form 4 · 0000947871-26-000785 · filed 2026-08-12 · View filing →

SEC FORM 4

—

Acquisition (code C) of 1,049,283 shares; price not stated (see filing).

Reporting Person GORDON CARL L · Transaction Code C

Traded Aug 10, 2026 · Disclosed Aug 12, 2026

Source: SEC Form 4 · 0000947871-26-000785 · filed 2026-08-12 · View filing →

SEC FORM 4CLUSTER · 2 INSIDERS

$20,000,000.00

Purchase of 1,250,000 shares across 2 reporting persons.

Transaction Code P · Reporting Persons 2

ORBIMED ADVISORS LLCPurchase of 625,000 shares at $16.00 per share.$10,000,000.00
GORDON CARL LPurchase of 625,000 shares at $16.00 per share.$10,000,000.00

Surfaced by rule: 2 distinct insiders, open-market purchases, 7-day window — a deterministic filter, not a recommendation.

Traded Aug 10, 2026 · Disclosed Aug 12, 2026

Source: SEC Form 4 · 0000947871-26-000784 · filed 2026-08-12 · View filing →

Source: SEC Form 4 · 0000947871-26-000785 · filed 2026-08-12 · View filing →