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Who

Michael G. Grey

Director

Company insider

Files Form 4 as: Executive Chairman, OnKure Therapeutics; Executive Chairman, Mirum Pharmaceuticals; Executive Chairman, Spruce Biosciences; Director, Horizon Therapeutics Public Ltd Co; Director, BioMarin Pharmaceutical; Director, Mirati Therapeutics; Director, Achillion Pharmaceuticals; Director, Idm Pharma.

In numbers

Trades disclosed
299
Buys
1
Sells
25
Bought
$95K
Sold
$24.8M
Companies
9
Companies where not an officer
5
First trade
7 Mar 2006
Last trade
7 Aug 2026
Last filed
11 Aug 2026

Companies traded

Where they are an officer
OKUR OnKure TherapeuticsDirector, Officer · Biotechnology · last 7 Aug 20260 buys · 0 sells
MIRM Mirum PharmaceuticalsDirector, Officer · Biotechnology · last 15 Jun 20260 buys · 7 sells
SPRB Spruce BiosciencesDirector, Officer · Biotechnology · last 21 May 20260 buys · 0 sells
Sgx PharmaceuticalsDirector, Officer · last 20 Aug 20080 buys · 0 sells
Everywhere else they filed: board seats, 10% stakes, other companies
Horizon Therapeutics Public Ltd CoDirector · last 6 Oct 20231 buy · 6 sells
BMRN BioMarin PharmaceuticalDirector · Biotechnology · last 5 Mar 20210 buys · 8 sells
Mirati TherapeuticsDirector · last 15 Jan 20210 buys · 4 sells
Achillion PharmaceuticalsDirector · last 18 Dec 20090 buys · 0 sells
Idm PharmaDirector · last 11 Dec 20080 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
20Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
7 Aug 2026filed 11 Aug 2026OKUR OnKure Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—22,350 at $0.00filing
7 Aug 2026filed 11 Aug 2026OKUR OnKure Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—22,350 at $0.00filing
15 Jun 2026filed 17 Jun 2026MIRM Mirum Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code A—3,772 at $0.00filing
15 Jun 2026filed 17 Jun 2026MIRM Mirum Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code A—1,980 at $0.00filing
15 Jun 2026filed 17 Jun 2026MIRM Mirum Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code A—3,772 at $0.00filing
15 Jun 2026filed 17 Jun 2026MIRM Mirum Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code A—1,980 at $0.00filing
4 Jun 2026filed 8 Jun 2026OKUR OnKure Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—7,650 at $0.00filing
4 Jun 2026filed 8 Jun 2026OKUR OnKure Therapeuticsoption or derivative · BiotechnologySEC FORM 4 Code A—7,650 at $0.00filing
21 May 2026filed 26 May 2026SPRB Spruce Biosciencesoption or derivative · BiotechnologySEC FORM 4 Code A—1,700 at $0.00filing
21 May 2026filed 26 May 2026SPRB Spruce Biosciencesoption or derivative · BiotechnologySEC FORM 4 Code A—1,700 at $0.00filing
19 Dec 2025filed 23 Dec 2025MIRM Mirum Pharmaceuticalsoption or derivative · BiotechnologySEC FORM 4 Code M—50,000 at $0.00filing
19 Dec 2025filed 23 Dec 2025MIRM Mirum PharmaceuticalsBiotechnologySEC FORM 4 Code M$147K50,000 at $2.94filing
19 Dec 2025filed 23 Dec 2025MIRM Mirum PharmaceuticalsBiotechnologySEC FORM 4 Sold$3.9M50,000 at $78.00filing
11 Dec 2025filed 15 Dec 2025SPRB Spruce Biosciencesoption or derivative · BiotechnologySEC FORM 4 Code A—387filing
11 Dec 2025filed 15 Dec 2025SPRB Spruce Biosciencesoption or derivative · BiotechnologySEC FORM 4 Code D—387filing
11 Dec 2025filed 15 Dec 2025SPRB Spruce Biosciencesoption or derivative · BiotechnologySEC FORM 4 Code A—1,255filing
11 Dec 2025filed 15 Dec 2025SPRB Spruce Biosciencesoption or derivative · BiotechnologySEC FORM 4 Code D—1,255filing
11 Dec 2025filed 15 Dec 2025SPRB Spruce Biosciencesoption or derivative · BiotechnologySEC FORM 4 Code A—1,499filing
11 Dec 2025filed 15 Dec 2025SPRB Spruce Biosciencesoption or derivative · BiotechnologySEC FORM 4 Code D—1,499filing
11 Dec 2025filed 15 Dec 2025SPRB Spruce Biosciencesoption or derivative · BiotechnologySEC FORM 4 Code A—133filing

News

Mirum Pharmaceuticals to report Livmarli trial results Monday (MIRM:NASDAQ)MIRM · seekingalpha.com · 12 Oct 2026

0 headlines in the last 90 days name Michael G. Grey; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.

Sectors

Health Care15
Not placed11

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

Related people

Jolanda HoweSVP, Global Controller · SVP, Global Controller at Mirum Pharmaceuticals, filing Form 4 there in the last year
Robert Paul MyersChief Medical Officer · Chief Medical Officer at Mirum Pharmaceuticals, filing Form 4 there in the last year
Christopher PeetzChief Executive Officer · Chief Executive Officer at Mirum Pharmaceuticals, filing Form 4 there in the last year
Nicholas A. SaccomanoPresident and CEO · President and CEO at OnKure Therapeutics, filing Form 4 there in the last year
Jason A. LeveroneChief Financial Officer · Chief Financial Officer at OnKure Therapeutics, filing Form 4 there in the last year
Eric BjerkholtChief Financial Officer · Also traded MIRM in the last 90 days
George Eric DavisEVP, Chief Legal Officer · Also traded BMRN in the last 90 days