Matthew Norkunas - 03 Aug 2026 Form 3 Insider Report for Obsidian Therapeutics, Inc. (OBX)

Reporting relationship: Director
Issuer ticker: OBX
Reported as of: 03 Aug 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 03 Aug 2026, 18:34:00 UTC
Prior SEC filing: 10 Jan 2025
Source filing: View source filing
Reporting owner signature: /s/ Gabriela Morales-Rivera, Attorney-in-Fact

Key filing fact

Matthew Norkunas filed Form 3 for Obsidian Therapeutics, Inc. (OBX) on 03 Aug 2026.

Key facts

This page summarizes Matthew Norkunas's Form 3 filing for Obsidian Therapeutics, Inc. (OBX).
0 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 03 Aug 2026, 18:34.

Change

Previous filing in this sequence was filed on 10 Jan 2025.
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

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0001816836 Primary reporting owner

Norkunas Matthew

Relationship: Director
Address: OBSIDIAN THERAPEUTICS, INC., 1030 MASSACHUSETTS AVE, CAMBRIDGE
Signature: /s/ Gabriela Morales-Rivera, Attorney-in-Fact
Signature date: 03 Aug 2026

Reported non-derivative transactions

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

OBX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 30,937
Date: 03 Aug 2026
Ownership: Direct

Reported derivative securities

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

OBX holding Derivative

Stock Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 03 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 180,000
Exercise price: $0.7800
Footnotes: F1

OBX holding Derivative

Stock Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 03 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 51,563
Exercise price: $0.7800
Footnotes: F2

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

The shares underlying this option vest in sixteen (16) equal quarterly installments following June 30, 2023, subject to the Reporting Person's continued service on each such vesting date.

Footnote F2

The shares underlying this option vest in sixteen (16) equal quarterly installments following June 25, 2024, subject to the Reporting Person's continued service on each such vesting date.

SEC remarks

Exhibit 24 - Power of Attorney