Deerfield Special Situations Fund, L.P.
10% Owner
Deerfield Special Situations Fund, L.P.10% Owner
Deerfield Special Situations Fund, L.P. insider trades: Mirum Pharmaceuticals (MIRM) stock buys and sales
10% Owner, Mirum Pharmaceuticals Last trade Jul 9, 2021 202 Form 4 filings
$0
Sold, last 12 months
0 sales
$0
Bought, last 12 months
0 buys
357
Open-market trades
since 2006
58
Companies
last trade 2021
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Deerfield Special Situations Fund, L.P. reports to the SEC
MIRMMirum Pharmaceuticals
10% Owner · last filing Jul 13, 2021
-$2.7M
+$5.0M
CABACabaletta Bio
10% Owner · last filing Oct 30, 2019
+$7.7M
FREQFrequency Therapeutics
10% Owner · last filing Oct 7, 2019
+$4.0M
ACRSAclaris Therapeutics
Insider · last filing Jul 1, 2019
-$7.7M
SWAVShockWave Medical
10% Owner · last filing Mar 11, 2019
+$510K
XERSXeris Pharmaceuticals
10% Owner · last filing Feb 12, 2019
-$2.2M
+$11.3M
and 52 more companies
Open-market buys and sales
357 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Jul 9, 2021 | MIRM | ↓ Sell | 99,325 | $15.81 | $1.6M | Through Deerfield Special Situations Fun | Jul 13, 2021 (4d) |
| Jul 7, 2021 | MIRM | ↓ Sell | 66,675 | $16.29 | $1.1M | Through Deerfield Special Situations Fun | Jul 7, 2021 (0d) |
| Oct 29, 2019 | CABA | ↑ Buy | 700,000 | $11.00 | $7.7M | Through Deerfield Partners, L.P. | Oct 30, 2019 (1d) |
| Oct 7, 2019 | FREQ | ↑ Buy | 285,714 | $14.00 | $4.0M | Through Deerfield Partners, L.P. | Oct 7, 2019 (0d) |
| Jul 22, 2019 | MIRM | ↑ Buy | 166,000 | $15.00 | $2.5M | Through Deerfield Special Situations Fun | Jul 24, 2019 (2d) |
| Jul 22, 2019 | MIRM | ↑ Buy | 166,000 | $15.00 | $2.5M | Through Deerfield Private Design Fund IV | Jul 24, 2019 (2d) |
| Jun 27, 2019 | ACRS | ↓ Sell | 590,801 | $2.69 | $1.6M | Through Deerfield Partners, L.P. | Jul 1, 2019 (4d) |
| Jun 27, 2019 | ACRS | ↓ Sell | 108,674 | $2.69 | $292K | Through Deerfield Special Situations Fun | Jul 1, 2019 (4d) |
| Jun 26, 2019 | ACRS | ↓ Sell | 1,352 | $4.50 | $6K | Through Deerfield Partners, L.P. | Jun 26, 2019 (0d) |
| Jun 26, 2019 | ACRS | ↓ Sell | 352 | $4.50 | $2K | Through Deerfield Special Situations Fun | Jun 26, 2019 (0d) |
| Jun 25, 2019 | ACRS | ↓ Sell | 360,429 | $4.59 | $1.7M | Through Deerfield Partners, L.P. | Jun 25, 2019 (0d) |
| Jun 25, 2019 | ACRS | ↓ Sell | 93,832 | $4.59 | $431K | Through Deerfield Special Situations Fun | Jun 25, 2019 (0d) |
| May 10, 2019 | ACRS | ↓ Sell | 370,041 | $6.13 | $2.3M | Through Deerfield Partners, L.P. | May 13, 2019 (3d) |
| May 10, 2019 | ACRS | ↓ Sell | 244,669 | $6.13 | $1.5M | Through Deerfield Special Situations Fun | May 13, 2019 (3d) |
| Mar 11, 2019 | SWAV | ↑ Buy | 10,000 | $17.00 | $170K | Through Deerfield Partners, L.P. | Mar 11, 2019 (0d) |
| Mar 11, 2019 | SWAV | ↑ Buy | 10,000 | $17.00 | $170K | Through Deerfield Special Situations Fun | Mar 11, 2019 (0d) |
| Mar 11, 2019 | SWAV | ↑ Buy | 10,000 | $17.00 | $170K | Through Deerfield Private Design Fund II | Mar 11, 2019 (0d) |
| Feb 11, 2019 | XERS | ↓ Sell | 7,241 | $15.09 | $109K | Through Deerfield Special Situations Fun | Feb 12, 2019 (1d) |
| Feb 7, 2019 | XERS | ↓ Sell | 14,807 | $15.02 | $222K | Through Deerfield Special Situations Fun | Feb 7, 2019 (0d) |
| Jan 29, 2019 | XERS | ↓ Sell | 7,038 | $15.12 | $106K | Through Deerfield Special Situations Fun | Jan 30, 2019 (1d) |
| Jan 25, 2019 | XERS | ↓ Sell | 114,444 | $15.43 | $1.8M | Through Deerfield Special Situations Fun | Jan 25, 2019 (0d) |
| Oct 1, 2018 | ARVN | ↑ Buy | 104,167 | $16.00 | $1.7M | Through Deerfield Private Design Fund II | Oct 1, 2018 (0d) |
| Oct 1, 2018 | ARVN | ↑ Buy | 104,167 | $16.00 | $1.7M | Through Deerfield Special Situations Fun | Oct 1, 2018 (0d) |
| Oct 1, 2018 | ARVN | ↑ Buy | 104,166 | $16.00 | $1.7M | Through Deerfield Private Design Fund IV | Oct 1, 2018 (0d) |
| Jul 23, 2018 | CNST | ↑ Buy | 200,000 | $15.00 | $3.0M | Through Deerfield Special Situations Fun | Jul 23, 2018 (0d) |
| Jun 25, 2018 | XERS | ↑ Buy | 624,333 | $15.00 | $9.4M | Through Deerfield Private Design Fund II | Jun 27, 2018 (2d) |
| Jun 25, 2018 | XERS | ↑ Buy | 125,667 | $15.00 | $1.9M | Through Deerfield Special Situations Fun | Jun 27, 2018 (2d) |
| Jun 25, 2018 | AVDL | ↓ Sell | 114,034 | $5.99 | $683K | Through Deerfield Special Situations Fun | Jun 25, 2018 (0d) |
| May 29, 2018 | KNSA | ↑ Buy | 843,352 | $18.97 | $16.0M | Through Deerfield Partners, L.P. | May 31, 2018 (2d) |
| Mar 8, 2018 | CBIO | ↓ Sell | 71,778 | $30.53 | $2.2M | Through Deerfield Special Situations Fun | Mar 8, 2018 (0d) |
| Oct 10, 2017 | RYTM | ↑ Buy | 177,500 | $17.00 | $3.0M | Through Deerfield Special Situations Fun | Oct 10, 2017 (0d) |
| Oct 10, 2017 | RYTM | ↑ Buy | 177,500 | $17.00 | $3.0M | Through Deerfield Private Design Fund II | Oct 10, 2017 (0d) |
| Jun 14, 2017 | REPH | ↓ Sell | 110,447 | $6.39 | $706K | Through Deerfield Special Situations Fun | Jun 14, 2017 (0d) |
| Jun 8, 2017 | REPH | ↓ Sell | 62,868 | $7.06 | $444K | Through Deerfield Special Situations Fun | Jun 9, 2017 (1d) |
| Apr 27, 2017 | EHTH | ↓ Sell | 250,156 | $11.66 | $2.9M | Through Deerfield Special Situations Fun | Apr 27, 2017 (0d) |
| Apr 27, 2017 | EHTH | ↓ Sell | 97,769 | $11.66 | $1.1M | Through Deerfield International Master F | Apr 27, 2017 (0d) |
| Apr 27, 2017 | EHTH | ↓ Sell | 79,029 | $11.66 | $921K | Through Deerfield Partners, L.P. | Apr 27, 2017 (0d) |
| Apr 13, 2017 | EHTH | ↓ Sell | 87,886 | $11.00 | $967K | Through Deerfield Special Situations Fun | Apr 17, 2017 (4d) |
| Apr 13, 2017 | EHTH | ↓ Sell | 34,349 | $11.00 | $378K | Through Deerfield International Master F | Apr 17, 2017 (4d) |
| Apr 13, 2017 | EHTH | ↓ Sell | 27,765 | $11.00 | $305K | Through Deerfield Partners, L.P. | Apr 17, 2017 (4d) |
| Apr 11, 2017 | EHTH | ↓ Sell | 135,990 | $11.38 | $1.5M | Through Deerfield Special Situations Fun | Apr 11, 2017 (0d) |
| Apr 11, 2017 | EHTH | ↓ Sell | 53,150 | $11.38 | $605K | Through Deerfield International Master F | Apr 11, 2017 (0d) |
| Apr 11, 2017 | EHTH | ↓ Sell | 42,961 | $11.38 | $489K | Through Deerfield Partners, L.P. | Apr 11, 2017 (0d) |
| Jan 26, 2017 | CASM | ↓ Sell | 636,238 | $1.46 | $931K | Through Deerfield Special Situations Fun | Jan 26, 2017 (0d) |
| Jan 23, 2017 | CASM | ↓ Sell | 205,126 | $1.53 | $313K | Through Deerfield Special Situations Fun | Jan 23, 2017 (0d) |
| Dec 14, 2016 | IVTY | ↓ Sell | 184,796 | $6.22 | $1.1M | Through Deerfield Special Situations Fun | Dec 14, 2016 (0d) |
| Sep 23, 2016 | VNDA | ↓ Sell | 500,592 | $16.56 | $8.3M | Through Deerfield International Master F | Sep 26, 2016 (3d) |
| Sep 23, 2016 | VNDA | ↓ Sell | 393,322 | $16.56 | $6.5M | Through Deerfield Partners, L.P. | Sep 26, 2016 (3d) |
| Sep 23, 2016 | VNDA | ↓ Sell | 226,547 | $16.56 | $3.8M | Through Deerfield Special Situations Fun | Sep 26, 2016 (3d) |
| Sep 19, 2016 | VNDA | ↓ Sell | 203,833 | $15.67 | $3.2M | Through Deerfield International Master F | Sep 19, 2016 (0d) |
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
Christopher Peetz
Chief Executive Officer
9 sales
Nov 4, 2026
Eric Bjerkholt
Chief Financial Officer
7 sales
Sep 14, 2026
Jolanda Howe
SVP, Global Controller
9 sales
Sep 2, 2026
Saira Ramasastry
Insider
8 sales
Jun 1, 2026
Peter Radovich
President and COO
4 sales
Mar 16, 2026
Joanne Quan
Chief Medical Officer
3 sales
Mar 16, 2026
Patrick J Heron
Insider
1 buy
Jan 23, 2026
Michael G Grey
Insider
3 sales
Dec 19, 2025
About Deerfield Special Situations Fund, L.P.'s insider trades
Deerfield Special Situations Fund, L.P. is a 10% owner of Mirum Pharmaceuticals (MIRM). Since Feb 22, 2006, it has reported 160 open-market purchases worth $373.1M and 197 sales worth $171.8M on SEC Form 4. There have been no open-market trades in the last 12 months.
Its filings also include conversions (28 filings), other transactions (14 filings), grants and awards (6 filings), option exercises (1 filing). 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.