Jorn Drappa - 22 May 2026 Form 4 Insider Report for ALUMIS INC. (ALMS)

Reporting relationship: Chief Medical Officer
Issuer ticker: ALMS
Reported as of: 22 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 27 May 2026, 19:06:45 UTC
Prior SEC filing: 28 Jan 2026
Next SEC filing: 05 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Sanam Pangali, Attorney-in-Fact

Key filing fact

Jorn Drappa filed Form 4 for ALUMIS INC. (ALMS) on 27 May 2026.

Key facts

This page summarizes Jorn Drappa's Form 4 filing for ALUMIS INC. (ALMS).
4 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 27 May 2026, 19:06.

Change

Previous filing in this sequence was filed on 28 Jan 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001789317 Primary reporting owner

Drappa Jorn

Relationship: Chief Medical Officer
Address: C/O ALUMIS INC., 280 EAST GRAND AVENUE, SOUTH SAN FRANCISCO
Signature: /s/ Sanam Pangali, Attorney-in-Fact
Signature date: 27 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ALMS transaction

Common Stock

Options Exercise

Transaction value
Shares: +11,317
Change %: +35%
Price: $8.84^*
Shares after: 43,804
Date: 22 May 2026
Ownership: Direct
Footnotes: F1

ALMS transaction

Common Stock

Options Exercise

Transaction value
Shares: +15,535
Change %: +35%
Price: $5.06^*
Shares after: 59,339
Date: 22 May 2026
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ALMS transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -11,317
Change %: -6.6%
Price: $0.000000^*
Shares after: 159,805
Date: 22 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 11,317
Exercise price: $8.84
Footnotes: F2

ALMS transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -15,535
Change %: -8.6%
Price: $0.000000^*
Shares after: 164,465
Date: 22 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 15,535
Exercise price: $5.06
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Includes 1,037 shares acquired on November 20, 2025 and 3,000 shares acquired on May 20, 2026 under the Issuer's 2024 Employee Stock Purchase Plan.

Footnote F2

25% of the shares underlying this option vested on August 22, 2023, and the remaining shares vest in equal monthly installments thereafter over the following 36 months, subject to acceleration and the Reporting Person's continuous service to the Issuer on each such vesting date.

Footnote F3

25% of the shares underlying this option vested on February 18, 2026, and the remaining shares vest in equal monthly installments thereafter over the following 36 months, subject to acceleration and the Reporting Person's continuous service to the Issuer on each such vesting date.