SEC Form 4 reporting owner

Chaouki Steven M

Chaouki Steven M has filed 18 Form 4 transactions reported between December 22, 2025 and September 1, 2026, as President, US Markets of TransUnion and Director of MAIA Biotechnology, Inc..

Name as filed: CHAOUKI STEVEN M

Open-market buys, 24 mo

$50K

1 lines

Open-market sales, 24 mo

$2.4M

8 lines

Companies

with Form 4 filings

Latest transaction

Sep 1, 2026

transaction date

Roles and reported holdings

TRUTransUnion
Jan 2, 2026 – Sep 1, 2026
President, US Markets
Held directly79,888 sh as of Sep 1, 2026 · Form 4
24 months: $2.4M sold
MAIAMAIA Biotechnology, Inc.
Dec 22, 2025 – Jun 30, 2026
Director
Held directly151,873 sh as of Dec 22, 2025 · Form 4
24 months: $50K bought

Transaction history

All 18 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Sep 1, 2026	TRUPresident, US Markets	Open-market saleCode S · directAlso reported by Skinner Todd C.	1,000	$84.42	$84K@ $84.42	79,888	Form 4
Aug 28, 2026	TRUPresident, US Markets	Shares withheld for tax or exercise priceCode F · direct	8,018	$85.67	$687K@ $85.67	80,888	Form 4
Aug 3, 2026	TRUPresident, US Markets	Open-market saleCode S · direct	1,000	$79.96	$80K@ $79.96	88,906	Form 4
Jul 1, 2026	TRUPresident, US Markets	Open-market saleCode S · direct	10,000	$72.64	$726K@ $72.64	89,906	Form 4
Jun 30, 2026	MAIADirector	Grant or awardCode A · direct	26,982	—	—	26,982	Form 4
Jun 1, 2026	TRUPresident, US Markets	Open-market saleCode S · direct	5,000	$70.73	$354K@ $70.73	99,906	Form 4
May 18, 2026	TRUPresident, US Markets	Shares withheld for tax or exercise priceCode F · direct	16,063	$68.60	$1.1M@ $68.60	104,906	Form 4
May 12, 2026	TRUPresident, US Markets	Grant or awardCode A · direct	36,258	—	—	120,969	Form 4
May 1, 2026	TRUPresident, US Markets	Open-market saleCode S · direct	5,000	$71.93	$360K@ $71.93	84,711	Form 4
Apr 2, 2026	TRUPresident, US Markets	Open-market saleCode S · direct	5,000	$70.00	$350K@ $70.00	89,711	Form 4
Mar 31, 2026	MAIADirector	Grant or awardCode A · direct	27,907	—	—	27,907	Form 4
Mar 2, 2026	TRUPresident, US Markets	Open-market saleCode S · direct	5,000	$76.64	$383K@ $76.64	94,711	Form 4
Feb 27, 2026	TRUPresident, US Markets	Shares withheld for tax or exercise priceCode F · direct	10,627	$78.55	$835K@ $78.55	99,711	Form 4
Feb 27, 2026	TRUPresident, US Markets	Grant or awardCode A · direct	24,825	—	—	110,338	Form 4
Feb 10, 2026	TRUPresident, US Markets	Grant or awardCode A · direct	23,921	—	—	85,513	Form 4
Jan 2, 2026	TRUPresident, US Markets	Open-market saleCode S · direct	1,000	$85.71	$86K@ $85.71	61,592	Form 4
Dec 31, 2025	MAIADirector	Grant or awardCode A · direct	24,633	—	—	24,633	Form 4
Dec 22, 2025	MAIADirector	Open-market purchaseCode P · direct	40,849	$1.22	$50K@ $1.22	151,873	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.