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$ Value

$45K

Shares

16,363

Price

$3

Filed

Jan 30

Insider

Name

GRAYZEL DAVID S.

Title

CIK

0001732786

Roles

Director

Transaction Details

Transaction Date

2026-01-15

Code

A

Table

Derivative

Ownership

Direct

Equity Swap

No

Shares After

16,363

Footnotes

This option was granted to the Reporting Person, a director of the Issuer pursuant to the 2024 Stock Option and Incentive Plan and pursuant to the Issuer's non-employee director compensation policy. This option shall vest in four equal quarterly installments as of the last date of each calendar quarter subject to the Reporting Person's continued service through such date and represents the Reporting Person's election to receive stock options in lieu of cash retainer fees. Due to administrative oversight this option award initially was not reported. | This option was granted to the Reporting Person, a director of the Issuer. The proceeds of any sale of shares of common stock issued to the Reporting Person upon exercise of this option will be transferred to Atlas Venture Life Science Advisors, LLC and as such, the Reporting Person disclaims ownership of such securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, except to the extent of his pecuniary interest therein, if any.

Filing Info

Accession No.

0001193125-26-032247

Form Type

4

Issuer CIK

0001661998

GRAYZEL DAVID S.'s History

Date Ticker Type Value
2026-01-15 QTTB A $45K
2025-10-23 QTTB A $0

Other Insiders at QTTB (90d)

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LAPORTE KATHLEEN 2026-01-15
Morrison Jodie Pope
CEO
$45K 2026-02-25
Kalowski Lee
CFO and President
$18K 2026-02-25
Lundberg Sven Ante 2026-01-15
Violette Shelia M.
Chief Scientific Officer
$13K 2026-02-25