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Who

William H. Chang

Director

Company insider

Files Form 4 as: Director and 10% owner, Semler Scientific; Director and 10% owner, Ensysce Biosciences.

Every Form 4 they filed

In numbers

Trades disclosed
87
Buys
5
Sells
7
Bought
$1.8M
Sold
$1.4M
Companies
2
Companies where not an officer
2
First trade
20 Feb 2014
Last trade
16 Jan 2026
Last filed
16 Jan 2026

Companies traded

Everywhere else they filed: board seats, 10% stakes, other companies
Semler ScientificDirector, 10% owner · Medical Devices · last 16 Jan 20265 buys · 7 sells
ENSC Ensysce BiosciencesDirector, 10% owner · Biotechnology · last 23 Jun 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
16 Jan 2026filed 16 Jan 2026Semler ScientificMedical DevicesSEC FORM 4 Code D—428,682filing
16 Jan 2026filed 16 Jan 2026Semler ScientificMedical DevicesSEC FORM 4 Code D—154,074filing
16 Jan 2026filed 16 Jan 2026Semler ScientificMedical DevicesSEC FORM 4 Code D—241,508filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivativeSEC FORM 4 Code D—4,000 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivativeSEC FORM 4 Code D—3,560 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivativeSEC FORM 4 Code D—500 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivativeSEC FORM 4 Code D—7,125 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivativeSEC FORM 4 Code D—1,000 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivativeSEC FORM 4 Code D—27,000 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivative · Medical DevicesSEC FORM 4 Code D—4,000 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivative · Medical DevicesSEC FORM 4 Code D—3,560 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivative · Medical DevicesSEC FORM 4 Code D—500 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivative · Medical DevicesSEC FORM 4 Code D—7,125 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivative · Medical DevicesSEC FORM 4 Code D—1,000 at $0.00filing
16 Jan 2026filed 16 Jan 2026Semler ScientificSEC FORM 4 Code D—428,682filing
16 Jan 2026filed 16 Jan 2026Semler ScientificSEC FORM 4 Code D—154,074filing
16 Jan 2026filed 16 Jan 2026Semler ScientificSEC FORM 4 Code D—241,508filing
16 Jan 2026filed 16 Jan 2026Semler Scientificoption or derivative · Medical DevicesSEC FORM 4 Code D—27,000 at $0.00filing
2 Jan 2026filed 2 Jan 2026Semler Scientificoption or derivative · Medical DevicesSEC FORM 4 Code A—4,000 at $0.00filing
2 Jan 2026filed 2 Jan 2026Semler Scientificoption or derivativeSEC FORM 4 Code A—4,000 at $0.00filing

News

No headline names them, or the companies they trade most, lately.

Sectors

Not placed12

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

Related people

Eric SemlerDirector · Director at Semler Scientific, filing Form 4 there in the last year
Daniel S. MessinaDirector · Director at Semler Scientific, filing Form 4 there in the last year
Douglas Murphy-ChutorianCEO, interim CFO and Director · CEO, interim CFO and Director at Semler Scientific, filing Form 4 there in the last year
Natalie BrunellDirector · Director at Semler Scientific, filing Form 4 there in the last year