STOCK TITAN

Q32 Bio Inc. (QTTB) director awarded 10,826 options at $12.64 strike

(Neutral)
(Neutral)
Form Type
4/A

Rhea-AI Filing Summary

Q32 Bio Inc. director Mary Thistle received a corrected grant of 10,826 stock options on June 12, 2026. The options have an exercise price of $12.64 per share, expire on June 11, 2036, and vest in full on the earlier of June 12, 2027 or the next annual stockholders’ meeting, subject to continued service.

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Insider Thistle Mary
Role Director
Type Security Shares Price Value
Grant/Award Stock Option (Right to Buy) F1, F2 10,826 $0.00 $0.00
Holdings After Transaction: Stock Option (Right to Buy) — 10,826 shares (Direct)
Footnotes (2)
  1. F1. This Form 4 amendment is being filed solely to amend the Form 4 filed on June 16, 2026 to correct the number of options awarded to the Reporting Person on June 12, 2026.
  2. F2. The shares underlying this option shall vest and become exercisable in full upon the earlier of (i) June 12, 2027 or (ii) the date of the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service on such vesting date.
Options granted 10,826 options Stock Option (Right to Buy) granted to director Mary Thistle on June 12, 2026
Exercise price $12.64 per share Conversion or exercise price for the stock options
Options after grant 10,826 options Total options held from this grant following the transaction
Option expiration date June 11, 2036 Expiration date of the stock option award
Latest vesting date June 12, 2027 Options vest earlier of June 12, 2027 or next annual meeting, subject to continued service
Stock Option (Right to Buy) financial
"security_title is listed as "Stock Option (Right to Buy)""
exercise price financial
"The option has a conversion or exercise price of 12.6400"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
vest and become exercisable financial
"The shares underlying this option shall vest and become exercisable in full"
annual meeting of stockholders regulatory
"earlier of (i) June 12, 2027 or (ii) the date of the Issuer's next annual meeting of stockholders"

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FAQ

What insider transaction did QTTB director Mary Thistle report in this Form 4/A?

Mary Thistle reported a grant of 10,826 stock options in Q32 Bio Inc. These options were awarded on June 12, 2026 as director compensation and give her the right to purchase Q32 Bio common stock at a fixed exercise price in the future.

What is the exercise price of the stock options granted to QTTB director Mary Thistle?

The stock options granted to Mary Thistle carry an exercise price of $12.64 per share. This means she may buy Q32 Bio common stock at $12.64 per share once the options vest and before they expire, regardless of the market price then.

When do Mary Thistle’s QTTB stock options vest and become exercisable?

The options will vest and become exercisable in full on the earlier of June 12, 2027 or Q32 Bio’s next annual meeting of stockholders. Vesting is subject to her continued service as of that vesting date, as described in the footnote.

What change does this Form 4/A amendment for QTTB disclose?

The amendment states it was filed to correct the number of options awarded to Mary Thistle on June 12, 2026. After correction, she is reported as holding 10,826 stock options from this grant, replacing the previously reported amount.

How many QTTB stock options does Mary Thistle hold from this reported grant after the transaction?

Following the reported grant, Mary Thistle holds 10,826 stock options from this award. The filing shows this as her total position in this specific option grant, all held directly, subject to vesting and the stated expiration date in 2036.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Thistle Mary

(Last)(First)(Middle)
Q32 BIO INC.
830 WINTER STREET

(Street)
WALTHAM MASSACHUSETTS 02451

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Q32 Bio Inc. [ QTTB ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/12/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)
06/16/2026
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy)$12.6406/12/2026A10,826(1) (2)06/11/2036Common Stock10,826(1)$010,826(1)D
Explanation of Responses:
1. This Form 4 amendment is being filed solely to amend the Form 4 filed on June 16, 2026 to correct the number of options awarded to the Reporting Person on June 12, 2026.
2. The shares underlying this option shall vest and become exercisable in full upon the earlier of (i) June 12, 2027 or (ii) the date of the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service on such vesting date.
/s/ Eric Bell, Attorney-in-Fact07/21/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)