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Who

Jon Marc Wigginton

Director

Company insider

Files Form 4 as: Director, Sutro Biopharma; Director, Checkmate Pharmaceuticals; Chief Medical Officer, Cullinan Therapeutics; Sr VP, Clinical Dev. & CMO, MacroGenics.

In numbers

Trades disclosed
81
Buys
0
Sells
21
Bought
$0
Sold
$4.4M
Companies
4
Companies where not an officer
2
First trade
1 Apr 2014
Last trade
5 Jun 2026
Last filed
9 Jun 2026

Companies traded

Where they are an officer
CGEM Cullinan TherapeuticsOfficer · Biotechnology · last 7 Jan 20210 buys · 0 sells
MGNX MacroGenicsOfficer · Biotechnology · last 20 Feb 20200 buys · 21 sells
Everywhere else they filed: board seats, 10% stakes, other companies
STRO Sutro BiopharmaDirector · Biotechnology · last 5 Jun 20260 buys · 0 sells
Checkmate PharmaceuticalsDirector · last 31 May 20220 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
101Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
5 Jun 2026filed 9 Jun 2026STRO Sutro Biopharmaoption or derivative · BiotechnologySEC FORM 4 Code A—10,000 at $0.00filing
5 Jun 2026filed 9 Jun 2026STRO Sutro Biopharmaoption or derivative · BiotechnologySEC FORM 4 Code A—10,000 at $0.00filing
23 Dec 2025filed 29 Dec 2025STRO Sutro Biopharmaoption or derivative · BiotechnologySEC FORM 4 Code A—1,500 at $0.00filing
6 Jun 2025filed 10 Jun 2025STRO Sutro Biopharmaoption or derivative · BiotechnologySEC FORM 4 Code A—50,000 at $0.00filing
6 Jun 2024filed 10 Jun 2024STRO Sutro Biopharmaoption or derivative · BiotechnologySEC FORM 4 Code A—35,000 at $0.00filing
8 Jun 2023filed 12 Jun 2023STRO Sutro Biopharmaoption or derivative · BiotechnologySEC FORM 4 Code A—25,000 at $0.00filing
6 Jun 2022filed 8 Jun 2022STRO Sutro Biopharmaoption or derivative · BiotechnologySEC FORM 4 Code A—18,500 at $0.00filing
31 May 2022filed 31 May 2022Checkmate Pharmaceuticalsoption or derivativeSEC FORM 4 Code D—20,061filing
30 Jan 2022filed 1 Feb 2022Checkmate Pharmaceuticalsoption or derivativeSEC FORM 4 Code A—20,061 at $0.00filing
3 Jun 2021filed 7 Jun 2021STRO Sutro Biopharmaoption or derivative · BiotechnologySEC FORM 4 Code A—18,500 at $0.00filing
7 Jan 2021filed 11 Jan 2021CGEM Cullinan Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—116,666 at $0.00filing
30 Nov 2020filed 1 Dec 2020STRO Sutro Biopharmaoption or derivative · BiotechnologySEC FORM 4 Code A—24,000 at $0.00filing
20 Feb 2020filed 24 Feb 2020MGNX MacroGenicsoption or derivative · BiotechnologySEC FORM 4 Code A$1.1M100,000 at $11.50filing
21 Feb 2019filed 25 Feb 2019MGNX MacroGenicsoption or derivative · BiotechnologySEC FORM 4 Code A—90,000 at $0.00filing
2 Mar 2018filed 6 Mar 2018MGNX MacroGenicsoption or derivative · BiotechnologySEC FORM 4 Code A—70,000 at $0.00filing
26 Feb 2018filed 27 Feb 2018MGNX MacroGenicsBiotechnologySEC FORM 4 Code F$260K11,070 at $23.46filing
17 Jan 2018filed 18 Jan 2018MGNX MacroGenicsBiotechnologySEC FORM 4 Code M$12K2,524 at $4.70filing
17 Jan 2018filed 18 Jan 2018MGNX MacroGenicsBiotechnologySEC FORM 4 Sold$50K2,524 at $20.00filing
17 Jan 2018filed 18 Jan 2018MGNX MacroGenicsoption or derivative · BiotechnologySEC FORM 4 Code M—2,524 at $0.00filing
16 Jan 2018filed 18 Jan 2018MGNX MacroGenicsBiotechnologySEC FORM 4 Code M$12K2,476 at $4.70filing

Sectors

Health Care21

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

Related people

Ezio BonviniSr VP, Research & CSO · Sr VP, Research & CSO at Macrogenics, filing Form 4 there in the last year
Jennifer MichaelsonChief Scientific Officer · Chief Scientific Officer at Cullinan Therapeutics, filing Form 4 there in the last year
Jeffrey Stuart PetersSenior VP, GC, and Secretary · Senior VP, GC, and Secretary at Macrogenics, filing Form 4 there in the last year
Mary Kay FentonChief Financial Officer · Chief Financial Officer at Cullinan Therapeutics, filing Form 4 there in the last year
Jacquelyn L. SumerChief Legal Officer · Chief Legal Officer at Cullinan Therapeutics, filing Form 4 there in the last year