SEC Form 4 reporting owner

Tzianabos Arthur

Tzianabos Arthur has filed 4 Form 4 transactions reported between March 10, 2026 and June 12, 2026, as a reporting owner of Q32 Bio Inc. and Interim Executive Chair of Stoke Therapeutics, Inc..

Name as filed: TZIANABOS ARTHUR

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$174K

1 lines

Companies

with Form 4 filings

Latest transaction

Jun 12, 2026

transaction date

Roles and reported holdings

QTTBQ32 Bio Inc.
Jun 12, 2026
Reporting owner
No common-stock holding reported on a purchase, sale, gift or withholding line.
STOKStoke Therapeutics, Inc.
Mar 10, 2026 – Jun 3, 2026
Interim Executive Chair
Held directly31,339 sh as of Mar 10, 2026 · Form 4
24 months: $174K sold

Transaction history

All 4 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Jun 12, 2026	QTTB	Grant or awardCode A · direct	9,810	—	—	9,810	Form 4
Jun 3, 2026	STOK	Grant or awardCode A · direct	17,786	—	—	17,786	Form 4
Mar 10, 2026	STOKInterim Executive Chair	Open-market saleCode S · direct	4,355	$40.00	$174K@ $40.00	31,339	Form 4
Mar 10, 2026	STOKInterim Executive Chair	Option exerciseCode M · direct	3,955	$8.33	$33K@ $8.33	35,694	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.