SEC Form 4 reporting owner

Horn Margaret A

Horn Margaret A has filed 28 Form 4 transactions reported between June 16, 2025 and September 16, 2026, as Chief Operating Officer of Revolution Medicines, Inc..

Name as filed: Horn Margaret A

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$25.3M

16 lines

Companies

with Form 4 filings

Latest transaction

Sep 16, 2026

transaction date

Roles and reported holdings

RVMDRevolution Medicines, Inc.
Jun 16, 2025 – Sep 16, 2026
Chief Operating Officer
Held directly149,680 sh as of Sep 16, 2026 · Form 4
24 months: $25.3M sold
1 line is priced far from RVMD’s market price that day, so the filing may concern a different security. Left out of totals and holdings; see the filings.

Transaction history

All 28 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Sep 16, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	4,891	$199.30	$975K@ $199.30	149,680	Form 4
Sep 16, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	76	$195.01	$15K@ $195.01	154,571	Form 4
Jun 17, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	29,600	$160.12	$4.7M@ $160.12	154,647	Form 4
Jun 17, 2026	RVMDChief Operating Officer	Option exerciseCode M · direct	25,725	$26.50	$682K@ $26.50	184,247	Form 4
Jun 17, 2026	RVMDChief Operating Officer	Option exerciseCode M · direct	3,302	$29.80	$98K@ $29.80	158,522	Form 4
Jun 17, 2026	RVMDChief Operating Officer	Option exerciseCode M · direct	573	$40.74	$23K@ $40.74	155,220	Form 4
Jun 15, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	60,400	$160.17	$9.7M@ $160.17	158,222	Form 4
Jun 15, 2026	RVMDChief Operating Officer	Option exerciseCode M · direct	44,854	$29.80	$1.3M@ $29.80	218,622	Form 4
Jun 15, 2026	RVMDChief Operating Officer	Option exerciseCode M · direct	15,546	$40.74	$633K@ $40.74	173,768	Form 4
Jun 11, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	200	$150.17	$30K@ $150.17	158,222	Form 4
Jun 11, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	4,600	$149.64	$688K@ $149.64	158,422	Form 4
Jun 11, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	1,800	$148.72	$268K@ $148.72	163,022	Form 4
Jun 11, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	500	$147.27	$74K@ $147.27	164,822	Form 4
Jun 11, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	700	$146.04	$102K@ $146.04	165,322	Form 4
Jun 11, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	885	$145.15	$128K@ $145.15	166,022	Form 4
Jun 11, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	1,315	$144.28	$190K@ $144.28	166,907	Form 4
Jun 11, 2026	RVMDChief Operating Officer	Option exerciseCode M · direct	8,906	$40.74	$363K@ $40.74	168,222	Form 4
Jun 11, 2026	RVMDChief Operating Officer	Option exerciseCode M · direct	1,094	$42.45	$46K@ $42.45	159,316	Form 4
Mar 17, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	4,583	$99.48	$456K@ $99.48	157,570	Form 4
Mar 1, 2026	RVMDChief Operating Officer	Grant or awardCode A · direct	47,600	—	—	47,600	Form 4
Mar 1, 2026	RVMDChief Operating Officer	Grant or awardCode A · direct	21,100	—	—	162,153	Form 4
Jan 7, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	1,700	$102.90	$175K@ $102.90	141,053	Form 4
Jan 7, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	20,204	$101.79	$2.1M@ $101.79	142,753	Form 4
Jan 7, 2026	RVMDChief Operating Officer	Open-market saleCode S · direct	53,096	$100.02	$5.3M@ $100.02	162,957	Form 4
Jan 7, 2026	RVMDChief Operating Officer	Option exerciseCode M · direct	23,594	$29.80	$703K@ $29.80	216,053	Form 4
Jan 7, 2026	RVMDChief Operating Officer	Option exerciseCode M · direct	51,406	$42.45	$2.2M@ $42.45	192,459	Form 4
Dec 16, 2025	RVMDChief Operating Officer	Open-market saleCode S · direct	4,847	$76.82	$372K@ $76.82	141,053	Form 4
Jun 16, 2025	RVMDChief Operating Officer	Open-market saleCode S · directPrice far from market; may be another security	3,575	$156.12	$558K@ $156.12	154,647	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.

1 open-market line is priced outside 0.67×–1.5× of the stock’s closing price that day. A gap that large usually means the filing reports a different security than the company it is filed under, so those lines are shown but left out of totals and holdings.

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