Lee Kalowski - 24 Feb 2026 Form 4 Insider Report for Q32 Bio Inc. (QTTB)

Reporting relationship: CFO and President
Issuer ticker: QTTB
Reported as of: 24 Feb 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 20 Mar 2026, 19:00:03 UTC
Prior SEC filing: 04 Dec 2025
Next SEC filing: 27 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Eric Bell, Attorney-in-Fact

Key filing fact

Lee Kalowski filed Form 4 for Q32 Bio Inc. (QTTB) on 20 Mar 2026.

Key facts

This page summarizes Lee Kalowski's Form 4 filing for Q32 Bio Inc. (QTTB).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 20 Mar 2026, 19:00.

Change

Previous filing in this sequence was filed on 04 Dec 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

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001618273 Primary reporting owner

Kalowski Lee

Relationship: CFO and President
Address: Q32 BIO INC., 830 WINTER STREET, WALTHAM
Signature: /s/ Eric Bell, Attorney-in-Fact
Signature date: 20 Mar 2026

Reported non-derivative transactions

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

QTTB transaction

Common Stock

Award

Transaction value
Shares: +53,250
Change %: +148%
Price: $0.000000^*
Shares after: 89,193
Date: 24 Feb 2026
Ownership: Direct
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

The restricted stock units ("RSUs") vest in four equal installments, 25% shall vest 6 months from February 24, 2026 (the "Grant Date"), 25% shall vest 12 months from the Grant Date, 25% shall vest 24 months from the Grant Date, and 25% shall vest 36 months from Grant Date. Each RSU represents a contingent right to receive one share of Issuer common stock.