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Who

Heather L. Mason

Director

Company insider

Files Form 4 as: Director, Immatics; Interim Executive Officer, Assertio Holdings; Director, Assertio Therapeutics; Executive Vice President, Abbott Laboratories.

Every Form 4 they filed

In numbers

Trades disclosed
281
Buys
2
Sells
26
Bought
$84K
Sold
$19.7M
Companies
4
Companies where not an officer
2
First trade
1 May 2008
Last trade
16 Jun 2026
Last filed
18 Jun 2026

Companies traded

Where they are an officer
Assertio HoldingsDirector, Officer · Biotechnology · last 16 Jun 20262 buys · 1 sell
ABT Abbott LaboratoriesOfficer · Biotechnology · last 1 Jul 20170 buys · 25 sells
Everywhere else they filed: board seats, 10% stakes, other companies
IMTX ImmaticsDirector · Biotechnology · last 16 Jun 20260 buys · 0 sells
Assertio TherapeuticsDirector · last 18 Feb 20200 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
01Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
16 Jun 2026filed 18 Jun 2026IMTX Immaticsoption or derivative · BiotechnologySEC FORM 4 Code A—48,000 at $0.00filing
16 Jun 2026filed 18 Jun 2026IMTX Immaticsoption or derivative · BiotechnologySEC FORM 4 Code A—48,000 at $0.00filing
16 Jun 2026filed 16 Jun 2026Assertio HoldingsBiotechnologySEC FORM 4 Code U—20,944 at $0.00filing
16 Jun 2026filed 16 Jun 2026Assertio HoldingsBiotechnologySEC FORM 4 Code U—6,666 at $0.00filing
16 Jun 2026filed 16 Jun 2026Assertio Holdingsoption or derivative · BiotechnologySEC FORM 4 Code D—36,666filing
16 Jun 2026filed 16 Jun 2026Assertio Holdingsoption or derivativeSEC FORM 4 Code D—36,666filing
16 Jun 2026filed 16 Jun 2026Assertio Holdingsoption or derivativeSEC FORM 4 Code D—5,415filing
16 Jun 2026filed 16 Jun 2026Assertio Holdingsoption or derivative · BiotechnologySEC FORM 4 Code D—5,415filing
16 Jun 2026filed 16 Jun 2026Assertio HoldingsSEC FORM 4 Code U—20,944 at $0.00filing
16 Jun 2026filed 16 Jun 2026Assertio HoldingsSEC FORM 4 Code U—6,666 at $0.00filing
13 May 2026filed 15 May 2026Assertio HoldingsBiotechnologySEC FORM 4 Code G—6,666 at $0.00filing
13 May 2026filed 15 May 2026Assertio HoldingsBiotechnologySEC FORM 4 Code G—6,666 at $0.00filing
13 May 2026filed 15 May 2026Assertio HoldingsSEC FORM 4 Code G—6,666 at $0.00filing
13 May 2026filed 15 May 2026Assertio HoldingsSEC FORM 4 Code G—6,666 at $0.00filing
5 May 2026filed 6 May 2026Assertio HoldingsBiotechnologySEC FORM 4 Code A—4,851 at $0.00filing
5 May 2026filed 6 May 2026Assertio HoldingsSEC FORM 4 Code A—4,851 at $0.00filing
7 May 2025filed 9 May 2025Assertio Holdingsoption or derivativeSEC FORM 4 Code A—81,225 at $0.00filing
7 May 2025filed 9 May 2025Assertio HoldingsSEC FORM 4 Code A—53,750 at $0.00filing
18 Nov 2024filed 19 Nov 2024Assertio HoldingsSEC FORM 4 Bought$60K75,000 at $0.80filing
5 Jun 2024filed 6 Jun 2024Assertio HoldingsSEC FORM 4 Bought$24K25,000 at $0.97filing

Sectors

Health Care25
Not placed3

Buys in green, sells in red, by the company’s sector.

Related people

John G. StrattonDirector · Director at Abbott Laboratories, filing Form 4 there in the last year
Nita AhujaDirector · Director at Abbott Laboratories, filing Form 4 there in the last year
Patricia Paola GonzalezDirector · Director at Abbott Laboratories, filing Form 4 there in the last year
Michael F. RomanDirector · Director at Abbott Laboratories, filing Form 4 there in the last year
Kevin T. ConroyDirector · Director at Abbott Laboratories, filing Form 4 there in the last year
Gilbert Ray Cisneros, Jr.Representative, CA-31 · Also traded ABT in the last 90 days
John A. McCoy Jr.Vice President and Controller · Also traded ABT in the last 90 days
Robert B. FordChairman and CEO · Also traded ABT in the last 90 days