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Who

Errol B. Desouza

Director

Company insider

Files Form 4 as: Director, Alector; Director, Royalty Pharma; Director, Cyclerion Therapeutics; Director, Gyre Therapeutics; CEO, Biodel; Director, Palatin Technologies; Director, IDEXX Laboratories.

Every Form 4 they filed

In numbers

Trades disclosed
117
Buys
1
Sells
0
Bought
$33K
Sold
$0
Companies
7
Companies where not an officer
6
First trade
30 Jan 2006
Last trade
17 Jun 2026
Last filed
17 Jun 2026

Companies traded

Where they are an officer
BiodelDirector, Officer · last 30 Sep 20151 buy · 0 sells
Everywhere else they filed: board seats, 10% stakes, other companies
ALEC AlectorDirector · Biotechnology · last 17 Jun 20260 buys · 0 sells
RPRX Royalty PharmaDirector · Pharmaceuticals · last 13 May 20250 buys · 0 sells
Cyclerion TherapeuticsDirector · Biotechnology · last 30 Nov 20230 buys · 0 sells
GYRE Gyre TherapeuticsDirector · Biotechnology · last 1 Oct 20210 buys · 0 sells
PTN Palatin TechnologiesDirector · Biotechnology · last 21 Jul 20100 buys · 0 sells
IDXX IDEXX LaboratoriesDirector · Diagnostics & Labs · last 30 Apr 20090 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
17 Jun 2026filed 17 Jun 2026ALEC AlectorBiotechnologySEC FORM 4 Code A—28,700 at $0.00filing
17 Jun 2026filed 17 Jun 2026ALEC Alectoroption or derivative · BiotechnologySEC FORM 4 Code A—9,450 at $0.00filing
17 Jun 2026filed 17 Jun 2026ALEC Alectoroption or derivative · BiotechnologySEC FORM 4 Code A—9,450 at $0.00filing
17 Jun 2026filed 17 Jun 2026ALEC AlectorBiotechnologySEC FORM 4 Code A—28,700 at $0.00filing
11 Jun 2025filed 12 Jun 2025ALEC Alectoroption or derivative · BiotechnologySEC FORM 4 Code A—9,450 at $0.00filing
11 Jun 2025filed 12 Jun 2025ALEC AlectorBiotechnologySEC FORM 4 Code A—28,700 at $0.00filing
13 May 2025filed 14 May 2025RPRX Royalty PharmaPharmaceuticalsSEC FORM 4 Code A—7,614 at $0.00filing
7 Jun 2024filed 10 Jun 2024RPRX Royalty PharmaPharmaceuticalsSEC FORM 4 Code A—9,293 at $0.00filing
19 Mar 2024filed 21 Mar 2024ALEC Alectoroption or derivative · BiotechnologySEC FORM 4 Code A—19,420 at $0.00filing
19 Mar 2024filed 21 Mar 2024ALEC AlectorBiotechnologySEC FORM 4 Code A—41,250 at $0.00filing
30 Nov 2023filed 4 Dec 2023Cyclerion TherapeuticsBiotechnologySEC FORM 4 Code A—20,000 at $0.00filing
30 Nov 2023filed 4 Dec 2023Cyclerion TherapeuticsBiotechnologySEC FORM 4 Code A—30,000 at $0.00filing
23 Jun 2023filed 26 Jun 2023RPRX Royalty PharmaPharmaceuticalsSEC FORM 4 Code A—7,747 at $0.00filing
24 Jun 2022filed 24 Jun 2022RPRX Royalty PharmaPharmaceuticalsSEC FORM 4 Code A—6,328 at $0.00filing
14 Jun 2022filed 16 Jun 2022Cyclerion Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—20,000 at $0.00filing
1 Oct 2021filed 5 Oct 2021GYRE Gyre TherapeuticsBiotechnologySEC FORM 4 Code A—3,588 at $0.00filing
1 Jul 2021filed 2 Jul 2021GYRE Gyre TherapeuticsBiotechnologySEC FORM 4 Code A—3,406 at $0.00filing
25 Jun 2021filed 29 Jun 2021RPRX Royalty PharmaPharmaceuticalsSEC FORM 4 Code A—5,726 at $0.00filing
24 Jun 2021filed 28 Jun 2021Cyclerion Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—10,000 at $0.00filing
9 Jun 2021filed 2 Jul 2021GYRE Gyre Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—14,000 at $0.00filing

News

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

Sectors

Not placed1

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

Related people

Nobody else traded the same names lately.