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Who

Joseph S. Zakrzewski

Director

Company insider

Files Form 4 as: Director, AN2 Therapeutics; Director, Cyteir Therapeutics; Director, Sangamo Therapeutics; Chief Executive Officer, Amarin Corporation; Director, Acceleron Pharma; Director, Insulet; Director, Liposcience; Director, Dov Pharmaceutical.

In numbers

Trades disclosed
253
Buys
32
Sells
22
Bought
$805K
Sold
$52.7M
Companies
8
Companies where not an officer
7
First trade
8 May 2008
Last trade
14 Aug 2026
Last filed
14 Aug 2026

Companies traded

Where they are an officer
AMRN Amarin CorporationDirector, Officer · Biotechnology · last 15 Dec 20213 buys · 16 sells
Everywhere else they filed: board seats, 10% stakes, other companies
ANTX AN2 TherapeuticsDirector · Biotechnology · last 14 Aug 20263 buys · 1 sell
Cyteir TherapeuticsDirector · last 6 Feb 20249 buys · 0 sells
Sangamo TherapeuticsDirector · last 25 Feb 20223 buys · 0 sells
Acceleron PharmaDirector · last 19 Nov 20212 buys · 2 sells
PODD InsuletDirector · Medical Devices · last 17 May 20171 buy · 3 sells
LiposcienceDirector · last 20 Nov 20140 buys · 0 sells
Dov PharmaceuticalDirector · last 19 Nov 200811 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
03Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
14 Aug 2026filed 14 Aug 2026ANTX AN2 TherapeuticsBiotechnologySEC FORM 4 Code G—405,880 at $0.00filing
14 Aug 2026filed 14 Aug 2026ANTX AN2 TherapeuticsBiotechnologySEC FORM 4 Code G—405,880 at $0.00filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—99,999filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—99,999filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—10,362filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—99,999filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—99,999filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—10,362filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—10,362filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—23,742filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—23,742filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—10,362filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—23,742filing
19 Mar 2026filed 23 Mar 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—23,742filing
20 Feb 2026filed 23 Feb 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—20,400 at $0.00filing
20 Feb 2026filed 23 Feb 2026ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—20,400 at $0.00filing
22 May 2025filed 23 May 2025ANTX AN2 Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—19,111 at $0.00filing
10 Apr 2025filed 11 Apr 2025ANTX AN2 TherapeuticsBiotechnologySEC FORM 4 Code A—10,523 at $0.00filing
19 Dec 2024filed 23 Dec 2024ANTX AN2 TherapeuticsBiotechnologySEC FORM 4 Code A—9,816 at $0.00filing
27 Nov 2024filed 27 Nov 2024ANTX AN2 TherapeuticsBiotechnologySEC FORM 4 Bought$2,8002,000 at $1.40filing

News

Amarin (NASDAQ:AMRN) and Merck KGaA (OTCMKTS:MKKGY) Financial ReviewAMRN · themarketsdaily.com · 11 Oct 2026

0 headlines in the last 90 days name Joseph S. Zakrzewski; 1 article from the last 14 days about the 3 companies they traded most, at most three about any one of them.

Sectors

Health Care27
Not placed27

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

Related people

Peter L. FishmanSVP, CFO · SVP, CFO at Amarin Corp PLC\uk, filing Form 4 there in the last year
Steven B. KetchumEVP, Chief Scientific Officer · EVP, Chief Scientific Officer at Amarin Corp PLC\uk, filing Form 4 there in the last year
Jonathan ProvoostEVP, Chief Legal Officer · EVP, Chief Legal Officer at Amarin Corp PLC\uk, filing Form 4 there in the last year
David Paul KeenanEVP, Chief Operating Officer · EVP, Chief Operating Officer at Amarin Corp PLC\uk, filing Form 4 there in the last year
Aaron BergPresident and CEO · President and CEO at Amarin Corp PLC\uk, filing Form 4 there in the last year
Gilbert Ray Cisneros, Jr.Representative, CA-31 · Also traded PODD in the last 90 days
Robin Shane ReadnourDirector · Also traded ANTX in the last 90 days
Margaret M. FitzPatrickDirector · Also traded ANTX in the last 90 days