- Corporate Officers - G
- Grey Michael G
Insider Trading History of Grey Michael G
The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Grey Michael G since 2015.
This trader's CIK number is 1240122.
At the time of last reporting, Grey Michael G was the Officer of Mirum Pharmaceuticals, Inc.. (stock ticker symbol MIRM).
Also see all insider trading activities at Mirum Pharmaceuticals, Inc..
Note that in the past
GREY MICHAEL G also reported insider trading activities as an insider of the following companies:
Yearly summary of insider trading at Biomarin Pharmaceutical Inc (BMRN) by Grey Michael G
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2021 | BMRN | 0 | $0 | 5,000 | $381,400 | 5,000 | $132,450 |
| 2020 | BMRN | 0 | $0 | 2,500 | $300,875 | 2,500 | $66,225 |
| 2016 | BMRN | 0 | $0 | 7,500 | $600,000 | 7,500 | $289,425 |
| 2015 | BMRN | 0 | $0 | 7,500 | $782,055 | 7,500 | $289,425 |
Yearly summary of insider trading at Onkure Therapeutics, Inc. (RPHM) by Grey Michael G
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2022 | RPHM | 0 | $0 | 0 | $0 | 50,000 | $98,500 |
Yearly summary of insider trading at Horizon Therapeutics Public Ltd Co (HZNP) by Grey Michael G
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2023 | HZNP | 0 | $0 | 0 | $0 | 23,913 | $319,200 |
| 2022 | HZNP | 0 | $0 | 0 | $0 | 4,223 | $0 |
| 2021 | HZNP | 0 | $0 | 5,000 | $500,125 | 16,098 | $11,850 |
| 2020 | HZNP | 0 | $0 | 15,795 | $844,059 | 31,185 | $103,351 |
| 2019 | HZNP | 0 | $0 | 0 | $0 | 15,320 | $0 |
| 2018 | HZNP | 0 | $0 | 0 | $0 | 14,054 | $0 |
| 2017 | HZNP | 10,000 | $94,800 | 0 | $0 | 13,953 | $0 |
Yearly summary of insider trading at Mirati Therapeutics, Inc. (MRTX) by Grey Michael G
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2020 | MRTX | 0 | $0 | 10,900 | $2,675,023 | 10,900 | $183,556 |
| 2019 | MRTX | 0 | $0 | 14,886 | $1,253,715 | 17,600 | $296,384 |
Yearly summary of insider trading at Mirum Pharmaceuticals, Inc. (MIRM) by Grey Michael G
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | MIRM | 0 | $0 | 100,000 | $7,200,000 | 100,000 | $293,600 |
| 2023 | MIRM | 0 | $0 | 43,824 | $1,300,112 | 43,824 | $128,666 |
Insider trading activities at 5 companies by Grey Michael G:
1. Biomarin Pharmaceutical Inc (BMRN)
2. Onkure Therapeutics, Inc. (RPHM)
3. Horizon Therapeutics Public Ltd Co (HZNP)
4. Mirati Therapeutics, Inc. (MRTX)
5. Mirum Pharmaceuticals, Inc. (MIRM)
Table 1. Insider trading of Biomarin Pharmaceutical Inc (BMRN) by Grey Michael G
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2021-03-05 | BMRN | Sale | 5,000 | 76.28 | 381,400 |
| 2021-03-05 | BMRN | Option Ex | 5,000 | 26.49 | 132,450 |
| 2020-08-03 | BMRN | Sale | 2,500 | 120.35 | 300,875 |
| 2020-08-03 | BMRN | Option Ex | 2,500 | 26.49 | 66,225 |
| 2016-02-22 | BMRN | Option Ex | 7,500 | 38.59 | 289,425 |
| 2016-02-22 | BMRN | Sale | 7,500 | 80.00 | 600,000 |
| 2015-11-16 | BMRN | Option Ex | 7,500 | 38.59 | 289,425 |
| 2015-11-16 | BMRN | Sale | 7,500 | 104.27 | 782,055 |
Table 2. Insider trading of Onkure Therapeutics, Inc. (RPHM) by Grey Michael G
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2022-08-31 | RPHM | Option Ex | 50,000 | 1.97 | 98,500 |
Table 3. Insider trading of Horizon Therapeutics Public Ltd Co (HZNP) by Grey Michael G
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2023-09-28 | HZNP | Option Ex | 20,000 | 15.96 | 319,200 |
| 2023-04-28 | HZNP | Option Ex | 3,913 | .00 | 0 |
| 2022-04-29 | HZNP | Option Ex | 4,223 | .00 | 0 |
| 2021-07-22 | HZNP | Option Ex | 5,000 | 2.37 | 11,850 |
| 2021-07-22 | HZNP | Sale | 5,000 | 100.03 | 500,125 |
| 2021-04-30 | HZNP | Option Ex | 11,098 | .00 | 0 |
| 2020-08-05 | HZNP | Option Ex | 1,755 | 3.95 | 6,932 |
| 2020-08-05 | HZNP | Sale | 1,755 | 73.35 | 128,729 |
| 2020-07-22 | HZNP | Option Ex | 1,755 | 3.95 | 6,932 |
| 2020-07-22 | HZNP | Sale | 1,755 | 60.00 | 105,300 |
| 2020-06-25 | HZNP | Sale | 1,755 | 55.00 | 96,525 |
| 2020-06-25 | HZNP | Option Ex | 1,755 | 3.95 | 6,932 |
| 2020-05-22 | HZNP | Option Ex | 10,530 | 7.84 | 82,555 |
| 2020-05-22 | HZNP | Sale | 10,530 | 48.77 | 513,505 |
| 2020-05-02 | HZNP | Option Ex | 15,390 | .00 | 0 |
| 2019-05-03 | HZNP | Option Ex | 15,320 | .00 | 0 |
| 2018-05-03 | HZNP | Option Ex | 14,054 | .00 | 0 |
| 2017-05-10 | HZNP | Buy | 10,000 | 9.48 | 94,800 |
| 2017-05-03 | HZNP | Option Ex | 13,953 | .00 | 0 |
Table 4. Insider trading of Mirati Therapeutics, Inc. (MRTX) by Grey Michael G
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2020-12-14 | MRTX | Option Ex | 10,900 | 16.84 | 183,556 |
| 2020-12-14 | MRTX | Sale | 10,900 | 245.41 | 2,675,023 |
| 2019-11-12 | MRTX | Option Ex | 3,500 | 16.84 | 58,940 |
| 2019-11-12 | MRTX | Sale | 3,042 | 102.44 | 311,622 |
| 2019-08-12 | MRTX | Sale | 3,042 | 92.67 | 281,917 |
| 2019-08-12 | MRTX | Option Ex | 3,500 | 16.84 | 58,940 |
| 2019-08-12 | MRTX | Sale | 3,042 | 92.67 | 281,917 |
| 2019-08-12 | MRTX | Option Ex | 3,500 | 16.84 | 58,940 |
| 2019-05-13 | MRTX | Option Ex | 7,100 | 16.84 | 119,564 |
| 2019-05-13 | MRTX | Sale | 5,760 | 65.67 | 378,259 |
Table 5. Insider trading of Mirum Pharmaceuticals, Inc. (MIRM) by Grey Michael G
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-12-01 | MIRM | Option Ex | 50,000 | 2.94 | 146,800 |
| 2025-12-01 | MIRM | Sale | 50,000 | 74.00 | 3,700,000 |
| 2025-11-21 | MIRM | Option Ex | 50,000 | 2.94 | 146,800 |
| 2025-11-21 | MIRM | Sale | 50,000 | 70.00 | 3,500,000 |
| 2023-09-14 | MIRM | Sale | 14,216 | 32.00 | 454,912 |
| 2023-09-13 | MIRM | Sale | 392 | 32.00 | 12,544 |
| 2023-09-14 | MIRM | Option Ex | 14,216 | 2.94 | 41,738 |
| 2023-09-13 | MIRM | Option Ex | 392 | 2.94 | 1,150 |
| 2023-06-08 | MIRM | Option Ex | 14,608 | 2.94 | 42,889 |
| 2023-06-08 | MIRM | Sale | 14,608 | 29.00 | 423,632 |
| 2023-05-03 | MIRM | Sale | 14,608 | 28.00 | 409,024 |
| 2023-05-03 | MIRM | Option Ex | 14,608 | 2.94 | 42,889 |
Insider trading activities including stock purchases, stock sales, and option exercises
listed in the above table cannot be completely guaranteed as to their accuracy.
For more information regarding the trades made by Grey Michael G
(Officer of Mirum Pharmaceuticals, Inc. at the time of this reporting) see
the Securities and Exchange Commission (SEC) website.