MICHAEL GREY Net Worth - Insider Trades and Bio as of Jun 4, 2026

MIRMMirum Pharmaceuticals, Inc.SEC CIK: 0001240122

Estimated Net Worth

$53.3 Million0.0%vs Last Year

Last Updated: May 19, 2026 11:11 PM EST

Transaction Summary

Total Transactions123

Buy-Sell Ratio0.04

Buy Transactions1

Sell Transactions24

Transaction Volume

Total Volume-$21.57M

Net Volume$21.76M

Buy Volume$94.80K

Sell Volume-$21.67M

Trade Analysis

AVG Trade Size-$262.14K

Largest Trade$1.57M

Most Active MonthMay

Most Active Year2021

Trading Sentiment

OverallBullish

Recent TradeSelling

Last 90 Days0 Trades

ConvictionNone

Net Worth & Trading Activity Over Time

Monthly Trading Pattern

Past Insider Trading and Trends

Michael G Grey has an estimated net worth of $53.3 Million. This is based on reported shares across multiple companies, which include Horizon Therapeutics Public Ltd Co, SGX PHARMACEUTICALS, INC., BIOMARIN PHARMACEUTICAL INC, Mirati Therapeutics, Inc., Mirum Pharmaceuticals, Inc., OnKure Therapeutics, Inc., SPRUCE BIOSCIENCES, INC., ACHILLION PHARMACEUTICALS INC, and IDM PHARMA, INC..

2020 was Michael G Grey's most active year for acquiring shares with 13 total transactions. Michael G Grey's most active month to acquire stocks was the month of April. 2008 was Michael G Grey's most active year for disposing of shares, totalling 48 transactions. Michael G Grey's most active month to dispose stocks was the month of February. 2012 saw Michael G Grey paying a total of $1,568,385.00 for 107,165 shares, this is the most they've acquired in one year. In 2023 Michael G Grey cashed out on 357,923 shares for a total of $12,646,280.00, their largest year based on trade value.

Holdings & Transactions

MIRMmirum pharmaceuticals, inc.

Updated: Dec 23, 2025VIEW QUOTE

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	-0.22	50.00K	$40.47	-$3.75M	Dec 23, 2025	461.34K	Sale	Scheduled	Dec 19	View
From 4	-0.18	50.00K	$38.47	-$3.55M	Dec 02, 2025	511.34K	Sale	Scheduled	Dec 01	View
From 4	-0.15	50.00K	$36.47	-$3.35M	Nov 25, 2025	561.34K	Sale	Scheduled	Nov 21	View
From 4	—	10.24K	—	—	Jun 02, 2025	10.25K	Grant	—	May 29	View
From 4	-0.36	102.79K	—	—	Oct 01, 2024	280.16K	Grant	—	Sep 27	View
From 4	—	14.48K	—	—	Jun 07, 2024	14.48K	Grant	—	Jun 05	View
From 4	-0.04	14.61K	$17.47	-$424.57K	Sep 14, 2023	714.12K	Sale	—	Sep 13 - 14	View
From 4	—	17.00K	—	—	Jun 14, 2023	17.00K	Grant	—	Jun 12	View
From 4	-0.04	14.61K	$15.97	-$380.74K	Jun 09, 2023	728.73K	Sale	—	Jun 08	View
From 4	-0.04	14.61K	$15.47	-$366.13K	May 04, 2023	743.34K	Sale	—	May 03	View
From 4	—	17.00K	—	—	Jun 06, 2022	17.00K	Grant	—	Jun 02	View
From 4	—	17.00K	—	—	Jun 08, 2021	17.00K	Grant	—	Jun 04	View
From 4	—	17.00K	—	—	Jun 15, 2020	17.00K	Grant	—	Jun 11	View
From 4	—	100.00K	—	—	Jan 02, 2020	100.00K	Grant	—	Jan 01	View
From 4	-0.16	55.64K	—	—	Jul 24, 2019	382.95K	Options	—	Jul 22	View
From 3	—	—	—	—	Jul 17, 2019	375.00K	—	—	—	View

OKURonkure therapeutics, inc.

Updated: May 30, 2025VIEW QUOTE

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	—	7.65K	—	—	May 30, 2025	7.65K	Grant	—	May 28	View
From 4	—	15.30K	—	—	Oct 08, 2024	15.30K	Grant	—	Oct 04	View
From 4	-1.00	50.00K	—	—	Jul 27, 2023	628.85K	Grant	—	Jul 26	View
From 4	—	17.50K	—	—	Jun 08, 2023	17.50K	Grant	—	Jun 06	View
From 4	—	—	$1.97	$98.50K	Sep 02, 2022	696.25K	Options	—	Aug 31	View
From 4	—	17.50K	—	—	Jun 03, 2022	17.50K	Grant	—	Jun 01	View
From 3/A	—	—	—	—	Apr 15, 2021	424.60K	—	—	—	View
From 4	-0.14	70.06K	—	—	Apr 15, 2021	578.85K	Options	—	Apr 13	View
From 4	—	14.00K	—	—	Apr 12, 2021	14.00K	Grant	—	Apr 08	View
From 3	—	—	—	—	Apr 08, 2021	558.69K	—	—	—	View

SPRBspruce biosciences, inc.

Executive Chairman

Updated: Dec 15, 2025VIEW QUOTE

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	—	—	—	—	Dec 15, 2025	4.34K	Acq/Dis	—	Dec 11	View
From 4	—	30.00K	—	—	Jul 24, 2025	30.00K	Grant	—	Jul 22	View
From 4	—	30.00K	—	—	May 24, 2024	30.00K	Grant	—	May 22	View
From 4	—	30.00K	—	—	May 26, 2023	30.00K	Grant	—	May 25	View
From 4	—	22.50K	—	—	May 27, 2022	22.50K	Grant	—	May 25	View
From 4	—	50.00K	—	—	Dec 20, 2021	50.00K	Grant	—	Dec 16	View
From 4	—	10.00K	—	—	May 21, 2021	10.00K	Grant	—	May 20	View
From 3	—	—	—	—	Oct 08, 2020	—	—	—	—	View

horizon therapeutics public ltd co

Updated: Oct 06, 2023

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	-1.00	196.36K	$116.50	-$11.35M	Oct 06, 2023	—	Disposition	—	Oct 06	View
From 4	—	—	$15.96	$319.20K	Sep 28, 2023	97.39K	Options	—	Sep 28	View
From 4	—	4.02K	—	—	Jul 28, 2023	4.02K	Grant	—	Jul 27	View
From 4	—	—	—	—	May 02, 2023	77.39K	Options	—	Apr 28	View
From 4	0.04	2.77K	$98.56	-$112.26K	May 02, 2022	69.29K	Options	—	Apr 28 - 29	View
From 4	-1.00	5.00K	$51.21	-$488.35K	Jul 23, 2021	62.29K	Sale	Scheduled	Jul 22	View
From 4	0.02	1.23K	$94.62	-$283.20K	Apr 30, 2021	74.62K	Options	—	Apr 29 - 30	View
From 4	-0.75	15.00K	$46.33	-$1.32M	Apr 13, 2021	67.29K	Sale	Scheduled	Apr 12	View
From 4	-1.00	1.75K	$38.65	-$121.80K	Aug 07, 2020	62.29K	Sale	Scheduled	Aug 05	View
From 4	-0.50	1.75K	$31.98	-$98.37K	Jul 22, 2020	64.05K	Sale	Scheduled	Jul 22	View
From 4	-0.33	1.75K	$29.48	-$89.59K	Jun 26, 2020	65.80K	Sale	Scheduled	Jun 25	View
From 4	-1.00	10.53K	$28.31	-$430.95K	May 26, 2020	62.29K	Sale	—	May 22	View
From 4	0.18	11.10K	—	—	May 04, 2020	73.39K	Options	—	Apr 30 - 02	View
From 4	0.22	11.26K	$26.54	-$109.66K	May 06, 2019	62.29K	Options	—	May 02 - 03	View
From 4	1.11	43.69K	$13.87	-$52.57K	May 07, 2018	83.19K	Options	—	May 03	View
From 4	0.65	10.00K	$9.48	$94.80K	May 10, 2017	25.45K	Purchase	—	May 10	View
From 4	2.16	41.44K	$15.12	-$56.90K	May 04, 2017	60.66K	Options	—	May 03	View
From 4	—	—	—	—	May 10, 2016	5.26K	Options	—	May 06	View
From 4	—	37.05K	—	—	May 05, 2016	37.05K	Grant	—	May 03	View
From 4	—	13.81K	—	—	May 08, 2015	13.81K	Grant	—	May 06	View
From 4	—	55.80K	—	—	Sep 22, 2014	55.80K	Grant	—	Sep 19	View
From 3	—	—	—	—	Sep 22, 2014	—	—	—	—	View
From 4	-1.00	55.80K	—	—	Sep 22, 2014	—	Disposition	—	Sep 19	View
From 4	—	20.00K	—	—	Jun 30, 2014	20.00K	Grant	—	Jun 27	View
From 4	—	20.00K	—	—	Jun 03, 2013	20.00K	Grant	—	May 31	View
From 4	—	5.26K	—	—	Feb 22, 2013	5.27K	Grant	—	Jun 08	View
From 3	—	—	—	—	Oct 03, 2011	—	—	—	—	View
From 4	—	10.53K	—	—	Oct 03, 2011	10.53K	Grant	—	Sep 29	View

BMRNbiomarin pharmaceutical inc

Updated: Mar 09, 2021VIEW QUOTE

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	-0.10	5.00K	$51.39	-$248.95K	Mar 09, 2021	42.84K	Sale	—	Mar 05	View
From 4	-0.05	2.50K	$73.42	-$234.65K	Aug 05, 2020	47.84K	Sale	Scheduled	Aug 03	View
From 4	0.11	4.30K	—	—	May 29, 2020	42.84K	Grant	—	May 27	View
From 4	0.13	4.43K	—	—	Jun 06, 2019	38.54K	Grant	—	Jun 04	View
From 4	0.14	4.30K	—	—	Jun 07, 2018	34.11K	Grant	—	Jun 05	View
From 4	0.25	6.96K	—	—	Jun 08, 2017	34.72K	Grant	—	Jun 06	View
From 4	0.23	5.95K	—	—	Jun 08, 2016	32.20K	Grant	—	Jun 06	View
From 4	-0.22	7.50K	$59.30	-$310.57K	Feb 23, 2016	26.25K	Sale	Scheduled	Feb 22	View
From 4	-0.18	7.50K	$71.43	-$492.63K	Nov 18, 2015	33.75K	Sale	Scheduled	Nov 16	View
From 4	0.17	4.40K	—	—	Jun 18, 2015	29.55K	Grant	—	Jun 10	View
From 4	0.38	8.70K	—	—	Jun 06, 2014	31.75K	Grant	—	Jun 04 - 06	View
From 4	-0.50	30.00K	$45.69	-$1.44M	Dec 13, 2013	30.55K	Sale	—	Dec 11	View
From 4	0.61	11.90K	—	—	May 17, 2013	31.55K	Grant	—	May 15	View
From 4	-0.43	15.00K	$37.50	-$693.28K	Mar 08, 2013	19.65K	Sale	—	Mar 03 - 06	View
From 4	0.14	11.90K	—	—	May 10, 2012	95.65K	Grant	—	May 08	View
From 4	1.67	90.00K	$26.14	$1.57M	Feb 24, 2012	83.75K	Options	—	Feb 23	View
From 4	0.18	17.50K	—	—	May 16, 2011	113.75K	Grant	—	May 12	View
From 4	0.22	17.50K	—	—	May 14, 2010	96.25K	Grant	—	May 12	View
From 4	—	—	—	—	May 27, 2009	11.25K	Grant	—	May 22	View
From 4	0.30	17.50K	—	—	May 14, 2009	76.25K	Grant	—	May 12	View
From 4	—	—	—	—	Jul 08, 2008	8.75K	Grant	—	Jul 07	View
From 4	0.45	17.50K	—	—	May 27, 2008	56.25K	Grant	—	May 22	View
From 4	-0.41	3.50K	$38.41	-$134.45K	Mar 07, 2008	5.00K	Sale	—	Mar 05	View
From 4	-0.32	21.50K	$24.25	-$510.78K	Mar 07, 2008	46.00K	Sale	—	Mar 05	View
From 4	0.15	8.75K	$17.33	$129.98K	Jun 11, 2007	68.75K	Grant	—	Jun 07	View
From 4	1.00	30.00K	—	—	Dec 18, 2006	60.00K	Grant	—	Dec 14	View
From 4	—	30.00K	—	—	Dec 21, 2005	30.00K	Grant	—	Dec 14	View
From 3	—	—	—	—	Dec 21, 2005	—	—	—	—	View

MRTXmirati therapeutics, inc.

Updated: Jan 20, 2021VIEW QUOTE

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	0.85	3.63K	—	—	Jan 20, 2021	7.89K	Grant	—	Jan 15	View
From 4	-0.72	10.90K	$131.14	-$2.49M	Dec 16, 2020	4.26K	Sale	Scheduled	Dec 14	View
From 4	2.66	6.00K	—	—	Jan 07, 2020	8.26K	Grant	—	Jan 03	View
From 4	-0.19	3.04K	$59.64	-$252.68K	Nov 14, 2019	13.16K	Sale	Scheduled	Nov 12	View
From 4	-0.16	3.04K	$54.56	-$221.76K	Aug 14, 2019	16.20K	Sale	Scheduled	Aug 12	View
From 4	-0.23	5.76K	$41.07	-$256.57K	May 15, 2019	19.24K	Sale	Scheduled	May 13	View
From 4	—	11.00K	—	—	Jan 22, 2019	11.00K	Grant	—	Jan 17	View
From 4	—	10.00K	—	—	Jan 22, 2018	10.00K	Grant	—	Jan 18	View
From 4	—	10.00K	—	—	May 19, 2017	10.00K	Grant	—	May 17	View
From 4	—	10.00K	—	—	May 19, 2016	10.00K	Grant	—	May 18	View
From 4	—	15.00K	—	—	May 22, 2015	15.00K	Grant	—	May 21	View
From 4	—	25.00K	—	—	Nov 06, 2014	25.00K	Grant	—	Nov 05	View
From 3	—	—	—	—	Nov 06, 2014	—	—	—	—	View

achillion pharmaceuticals inc

Updated: Dec 22, 2009

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	—	20.00K	—	—	Dec 22, 2009	20.00K	Grant	—	Dec 18	View
From 4	—	20.00K	—	—	Dec 17, 2008	20.00K	Grant	—	Dec 15	View
From 4	—	10.00K	—	—	Aug 20, 2008	10.00K	Grant	—	Aug 18	View
From 4	—	15.00K	—	—	Dec 18, 2007	15.00K	Grant	—	Dec 14	View
From 4	—	15.00K	—	—	Dec 26, 2006	15.00K	Grant	—	Dec 19	View
From 3	—	—	—	—	Oct 25, 2006	—	—	—	—	View

sgx pharmaceuticals, inc.

President & CEO Director

Updated: Aug 21, 2008

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	-1.00	734.30K	$2.50	-$827.73K	Aug 21, 2008	—	Disposition	—	Aug 20	View
From 4	—	133.00K	—	—	Feb 25, 2008	133.00K	Grant	—	Feb 21	View
From 4	—	150.00K	—	—	Jan 29, 2007	150.00K	Grant	—	Jan 26	View
From 4	—	80.00K	—	—	Mar 09, 2006	80.00K	Grant	—	Mar 07	View
From 3	—	—	—	—	Jan 31, 2006	100.00K	—	—	—	View

idm pharma, inc.

Updated: Dec 12, 2008

Form Type	Δ Own, %	Traded Shares	Price	Size, $	Filing Date	Own, %	Type	Scheduled	Trade Dates	SEC Filing
From 4	—	20.00K	—	—	Dec 12, 2008	20.00K	Grant	—	Dec 11	View
From 4	—	10.00K	—	—	Jun 25, 2008	10.00K	Grant	—	Jun 25	View
From 4	—	20.00K	—	—	Jan 15, 2008	20.00K	Grant	—	Jan 10	View
From 4	—	5.00K	—	—	Jun 18, 2007	5.00K	Grant	—	Jun 14	View
From 4	—	5.00K	—	—	Jun 16, 2006	5.00K	Grant	—	Jun 14	View
From 4	—	17.14K	—	—	Sep 19, 2005	17.14K	Grant	—	Sep 16	View
From 4	—	2.86K	—	—	Aug 17, 2005	2.86K	Grant	—	Aug 16	View
From 4	—	5.00K	—	—	Jun 15, 2004	5.00K	Grant	—	Jun 15	View
From 4	—	—	—	—	Jul 17, 2003	—	—	—	—	View

Benzinga

Benzinga

Net Worth & Trading Activity Over Time

Monthly Trading Pattern

Past Insider Trading and Trends

Holdings & Transactions