SEC Form 4 reporting owner

Zachary Jennifer

Zachary Jennifer has filed 12 Form 4 transactions reported between February 9, 2026 and August 12, 2026, as EVP, General Counsel of Merck & Co., Inc. and a reporting owner of REGENXBIO Inc..

Name as filed: Zachary Jennifer

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$10.7M

1 lines

Companies

with Form 4 filings

Latest transaction

Aug 12, 2026

transaction date

Roles and reported holdings

MRKMerck & Co., Inc.
Feb 9, 2026 – Aug 12, 2026
EVP, General Counsel
Held directly45,509 sh as of Aug 12, 2026 · Form 4
24 months: $10.7M sold
RGNXREGENXBIO Inc.
May 29, 2026
Reporting owner
No common-stock holding reported on a purchase, sale, gift or withholding line.

Transaction history

All 12 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Aug 12, 2026	MRKEVP, General Counsel	Open-market saleCode S · direct	80,315	$133.46	$10.7M@ $133.46	45,509	Form 4
Aug 12, 2026	MRKEVP, General Counsel	Option exerciseCode M · direct	13,433	$84.71	$1.1M@ $84.71	125,824	Form 4
Aug 12, 2026	MRKEVP, General Counsel	Option exerciseCode M · direct	41,494	$117.89	$4.9M@ $117.89	112,391	Form 4
May 29, 2026	RGNX	Grant or awardCode A · direct	46,600	—	—	46,600	Form 4
May 29, 2026	RGNX	Grant or awardCode A · direct	9,807	—	—	31,871	Form 4
May 5, 2026	MRKEVP, General Counsel	Grant or awardCode A · direct	35,312	—	—	35,312	Form 4
May 5, 2026	MRKEVP, General Counsel	Grant or awardCode A · direct	12,064	—	—	12,064	Form 4
Apr 29, 2026	MRKEVP, General Counsel	Shares withheld for tax or exercise priceCode F · direct	1,454	$110.03	$160K@ $110.03	70,897	Form 4
Apr 29, 2026	MRKEVP, General Counsel	Option exerciseCode M · direct	2,951	$110.03	$325K@ $110.03	72,351	Form 4
Feb 9, 2026	MRKEVP, General Counsel	Option exerciseCode M · direct	38,835	$119.15	$4.6M@ $119.15	107,751	Form 4
Feb 9, 2026	MRKEVP, General Counsel	Option exerciseCode M · direct	56,792	$119.15	$6.8M@ $119.15	125,708	Form 4
Feb 9, 2026	MRKEVP, General Counsel	Option exerciseCode M · direct	25,946	$119.15	$3.1M@ $119.15	94,862	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.