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Who

Martin H. Huber Jr.

Director

Company insider

Files Form 4 as: Director, Actuate Therapeutics; Director, Syndax Pharmaceuticals; President, CEO, Mersana Therapeutics; President and Head of R&D, Xilio Therapeutics; SVP & Chief Medical Officer, Tesaro.

In numbers

Trades disclosed
125
Buys
1
Sells
12
Bought
$45K
Sold
$850K
Companies
5
Companies where not an officer
2
First trade
21 Sep 2015
Last trade
21 May 2026
Last filed
22 May 2026

Companies traded

Where they are an officer
Mersana TherapeuticsDirector, Officer · Biotechnology · last 6 Jan 20260 buys · 3 sells
XLO Xilio TherapeuticsOfficer · Biotechnology · last 16 Aug 20230 buys · 0 sells
TesaroOfficer · last 22 Jan 20190 buys · 9 sells
Everywhere else they filed: board seats, 10% stakes, other companies
ACTU Actuate TherapeuticsDirector · Biotechnology · last 21 May 20260 buys · 0 sells
SNDX Syndax PharmaceuticalsDirector · Biotechnology · last 4 Feb 20261 buy · 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
21 May 2026filed 22 May 2026ACTU Actuate Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—15,000 at $0.00filing
21 May 2026filed 22 May 2026ACTU Actuate Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—15,000 at $0.00filing
4 Feb 2026filed 6 Feb 2026SNDX Syndax PharmaceuticalsBiotechnologySEC FORM 4 Code A—24,000 at $0.00filing
4 Feb 2026filed 6 Feb 2026SNDX Syndax PharmaceuticalsBiotechnologySEC FORM 4 Code A—24,000 at $0.00filing
6 Jan 2026filed 6 Jan 2026Mersana TherapeuticsBiotechnologySEC FORM 4 Code U—9,573filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—734filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—179filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—12,121filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—27,878filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—364filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—497filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—7,467filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—13,340filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—1,328filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—7,256filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—5,938filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code D—26,713filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivativeSEC FORM 4 Code D—5,938filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivativeSEC FORM 4 Code D—26,713filing
6 Jan 2026filed 6 Jan 2026Mersana Therapeuticsoption or derivativeSEC FORM 4 Code D—1,923filing

News

Syndax Pharmaceuticals (SNDX) – Analysts' Recent Ratings ChangesSNDX · dailypolitical.com · 19 Oct 2026Syndax Pharmaceuticals (NASDAQ:SNDX) Shares Gap Down – Here's WhySNDX · tickerreport.com · 15 Oct 2026

0 headlines in the last 90 days name Martin H. Huber Jr.; 2 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.

Sectors

Health Care1
Not placed12

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

Related people

Yariv HouvrasChief Medical Officer · Chief Medical Officer at Xilio Therapeutics, filing Form 4 there in the last year
Akintunde Olatokumbo BelloDirector · Director at Xilio Therapeutics, filing Form 4 there in the last year
Daniel J. CurranDirector · Director at Xilio Therapeutics, filing Form 4 there in the last year
Aoife BrennanPresident and CEO · Director at Xilio Therapeutics, filing Form 4 there in the last year
Sara BonsteinDirector · Director at Xilio Therapeutics, filing Form 4 there in the last year