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Who

Dennis Langer

Director

Company insider

Files Form 4 as: Director, Quoin Pharmaceuticals; Director, Myriad Genetics; Director, Ernexa Therapeutics; Director, Dicerna Pharmaceuticals; Director, Pernix Therapeutics Holdings; Director, Delcath Systems; Director, Myrexis; Director, Auxilium Pharmaceuticals.

In numbers

Trades disclosed
194
Buys
1
Sells
19
Bought
$129K
Sold
$10.6M
Companies
11
Companies where not an officer
11
First trade
6 Jan 2006
Last trade
27 Aug 2026
Last filed
28 Aug 2026

Companies traded

Everywhere else they filed: board seats, 10% stakes, other companies
QNRX Quoin PharmaceuticalsDirector · Biotechnology · last 27 Aug 20261 buy · 1 sell
MYGN Myriad GeneticsDirector · Diagnostics & Labs · last 2 Jun 20220 buys · 16 sells
ERNA Ernexa TherapeuticsDirector · Biotechnology · last 8 Dec 20210 buys · 0 sells
Dicerna PharmaceuticalsDirector · last 20 Jun 20190 buys · 2 sells
Pernix Therapeutics HoldingsDirector · last 22 May 20180 buys · 0 sells
DCTH Delcath SystemsDirector · Medical Devices · last 10 Jun 20150 buys · 0 sells
MyrexisDirector · last 8 Dec 20110 buys · 0 sells
Auxilium PharmaceuticalsDirector · last 3 Jun 20100 buys · 0 sells
CytogenDirector · last 8 May 20080 buys · 0 sells
PharmacopeiaDirector · last 30 Apr 20080 buys · 0 sells
Sirna TherapeuticsDirector · last 29 Dec 20060 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
27 Aug 2026filed 28 Aug 2026QNRX Quoin PharmaceuticalsBiotechnologySEC FORM 4 Code A$178K34,534 at $5.15filing
27 Aug 2026filed 28 Aug 2026QNRX Quoin PharmaceuticalsBiotechnologySEC FORM 4 Code A$178K34,534 at $5.15filing
4 Feb 2026filed 6 Feb 2026QNRX Quoin Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code A—21,709 at $0.00filing
4 Feb 2026filed 6 Feb 2026QNRX Quoin Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code A—21,709 at $0.00filing
14 Oct 2025filed 15 Oct 2025QNRX Quoin Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code P—15,152filing
14 Oct 2025filed 15 Oct 2025QNRX Quoin Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code P—15,152filing
14 Oct 2025filed 15 Oct 2025QNRX Quoin Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code P—15,152filing
14 Oct 2025filed 15 Oct 2025QNRX Quoin Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code P—15,152filing
14 Oct 2025filed 15 Oct 2025QNRX Quoin PharmaceuticalsBiotechnologySEC FORM 4 Bought$129K15,152 at $8.49filing
21 Aug 2025filed 25 Aug 2025QNRX Quoin Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code A—13,682 at $0.00filing
29 May 2025filed 2 Jun 2025QNRX Quoin Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code A—7,760 at $0.00filing
9 Dec 2024filed 10 Dec 2024QNRX Quoin Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code A—50,714 at $0.00filing
7 Jun 2024filed 10 Jun 2024QNRX Quoin PharmaceuticalsBiotechnologySEC FORM 4 Sold$217297 at $0.73filing
26 Oct 2023filed 30 Oct 2023QNRX Quoin Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code A—7,652 at $0.00filing
2 Jun 2022filed 3 Jun 2022MYGN Myriad GeneticsDiagnostics & LabsSEC FORM 4 Code A—17,275 at $0.00filing
8 Dec 2021filed 10 Dec 2021ERNA Ernexa Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—67,000 at $0.00filing
3 Aug 2021filed 5 Aug 2021MYGN Myriad Geneticsoption or derivative · Diagnostics & LabsSEC FORM 4 Code M—30,000 at $0.00filing
3 Aug 2021filed 5 Aug 2021MYGN Myriad GeneticsDiagnostics & LabsSEC FORM 4 Code M$762K30,000 at $25.39filing
3 Aug 2021filed 5 Aug 2021MYGN Myriad GeneticsDiagnostics & LabsSEC FORM 4 Sold$1.0M30,000 at $34.75filing
3 Jun 2021filed 4 Jun 2021MYGN Myriad GeneticsDiagnostics & LabsSEC FORM 4 Code A—12,848 at $0.00filing

Sectors

Health Care18
Not placed2

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

Related people

Denise P. CarterChief Operating Officer · Chief Operating Officer at Quoin Pharmaceuticals, filing Form 4 there in the last year
Anthony James CulverwellDirector · Director at Quoin Pharmaceuticals, filing Form 4 there in the last year
Michael MyersChief Executive Officer · Chief Executive Officer at Quoin Pharmaceuticals, filing Form 4 there in the last year
Sally Bridget LawlorChief Financial Officer · Chief Financial Officer at Quoin Pharmaceuticals, filing Form 4 there in the last year
Joseph Patrick CooperDirector · Director at Quoin Pharmaceuticals, filing Form 4 there in the last year