Michael G Grey insider trades: Mirum Pharmaceuticals (MIRM) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Michael reports to the SEC
and 4 more companies
Open-market buys and sales
25 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Dec 19, 2025 | MIRM | ↓ Sell | 50,000 | $78.00 | $3.9M | Direct | Dec 23, 2025 (4d) |
| Dec 1, 2025 | MIRM | ↓ Sell | 50,000 | $74.00 | $3.7M | Direct | Dec 2, 2025 (1d) |
| Nov 21, 2025 | MIRM | ↓ Sell | 50,000 | $70.00 | $3.5M | Direct | Nov 25, 2025 (4d) |
| Sep 14, 2023 | MIRM | ↓ Sell | 14,608 | $32.00 | $467K | Direct | Sep 14, 2023 (0d) |
| Jun 8, 2023 | MIRM | ↓ Sell | 14,608 | $29.00 | $424K | Direct | Jun 9, 2023 (1d) |
| May 3, 2023 | MIRM | ↓ Sell | 14,608 | $28.00 | $409K | Direct | May 4, 2023 (1d) |
| Jul 22, 2021 | HZNP | ↓ Sell | 5,000 | $100.04 | $500K | Direct | Jul 23, 2021 (1d) |
| Apr 12, 2021 | HZNP | ↓ Sell | 15,000 | $90.28 | $1.4M | Direct | Apr 13, 2021 (1d) |
| Mar 5, 2021 | BMRN | ↓ Sell | 5,000 | $76.28 | $381K | Direct | Mar 9, 2021 (4d) |
| Dec 14, 2020 | MRTX | ↓ Sell | 10,900 | $245.44 | $2.7M | Direct | Dec 16, 2020 (2d) |
| Aug 5, 2020 | HZNP | ↓ Sell | 1,755 | $73.35 | $129K | Direct | Aug 7, 2020 (2d) |
| Aug 3, 2020 | BMRN | ↓ Sell | 2,500 | $120.35 | $301K | Direct | Aug 5, 2020 (2d) |
| Jul 22, 2020 | HZNP | ↓ Sell | 1,755 | $60.00 | $105K | Direct | Jul 22, 2020 (0d) |
| Jun 25, 2020 | HZNP | ↓ Sell | 1,755 | $55.00 | $97K | Direct | Jun 26, 2020 (1d) |
| May 22, 2020 | HZNP | ↓ Sell | 10,530 | $48.77 | $514K | Direct | May 26, 2020 (4d) |
| Nov 12, 2019 | MRTX | ↓ Sell | 3,042 | $102.44 | $312K | Direct | Nov 14, 2019 (2d) |
| Aug 12, 2019 | MRTX | ↓ Sell | 3,042 | $92.27 | $281K | Direct | Aug 14, 2019 (2d) |
| May 13, 2019 | MRTX | ↓ Sell | 5,760 | $65.30 | $376K | Direct | May 15, 2019 (2d) |
| May 10, 2017 | HZNP | ↑ Buy | 10,000 | $9.48 | $95K | By Trust | May 10, 2017 (0d) |
| Feb 22, 2016 | BMRN | ↓ Sell | 7,500 | $80.00 | $600K | Direct | Feb 23, 2016 (1d) |
| Nov 16, 2015 | BMRN | ↓ Sell | 7,500 | $104.27 | $782K | Direct | Nov 18, 2015 (2d) |
| Dec 11, 2013 | BMRN | ↓ Sell | 30,000 | $69.66 | $2.1M | Direct | Dec 13, 2013 (2d) |
| Mar 6, 2013 | BMRN | ↓ Sell | 15,000 | $60.61 | $909K | Direct | Mar 8, 2013 (2d) |
| Mar 5, 2008 | BMRN | ↓ Sell | 21,500 | $38.17 | $821K | Direct | Mar 7, 2008 (2d) |
| Mar 5, 2008 | BMRN | ↓ Sell | 3,500 | $38.41 | $134K | Direct | Mar 7, 2008 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MIRM insiders
Open-market trades in the last 12 months
About Michael G Grey's insider trades
Michael G Grey is an insider at Mirum Pharmaceuticals (MIRM). Since Mar 5, 2008, Michael has reported 1 open-market purchase worth $95K and 24 sales worth $24.8M on SEC Form 4. In the last 12 months: 3 sales ($11.1M).
Their filings also include grants and awards (78 filings), option exercises (34 filings), shares returned to the company (5 filings), shares withheld for taxes (5 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MIRM insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.