Mirum Pharmaceuticals Inc
$98.34+0.3%
+$1.3B
Net Activity
+13.30% total shares
Institutions Holding
331
Popularity Rank
#1898
Avg Weight
0.38%
Total Value
$8.5B
Market Cap
$4.9B
331 institutions currently hold MIRM, with 192 net buyers and 142 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
142
Net Buying Institutions
192
Top 5 by Value
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Across its top 20 institutional holders, MIRM's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 11/100, avg. turnover score 34/100).
MIRM ranks #1898 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
MIRM is a top-conviction position for Frazier Life Sciences Management, L.P. — at 19.6% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
Fidelity has added to its MIRM position for two straight quarters, increasing it by $378.6M to reach $429.7M today.
David Shaw has trimmed its MIRM position for two straight quarters, cutting it by $71.6M while still holding $3.3M.
MIRM is up 0.3% today, and institutions have been net buyers of $1.3B this quarter — today's price move and the underlying institutional flow are pointing the same direction.
MIRM reported a net loss of $860.2M over the trailing twelve months.
+$1.5B
Total Buy Value
$961.5M
Total Sell Value
192
Net Buyers
142
Net Sellers
MIRM
Q2 2026
Top 5 Institutional Movers
MIRM does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
9
Filings (90d)
$10.89M
Total Est. Value
103K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| JOLANDA MARIE HOWE | 2026-08-18 | $4.00M |
| ERIC BJERKHOLT | 2026-08-11 | $600K |
| CHRISTOPHER PEETZ | 2026-08-10 | $1.98M |
| JOLANDA MARIE HOWE | 2026-08-03 | $194K |
| ERIC BJERKHOLT | 2026-07-06 | $611K |
| CHRISTOPHER PEETZ | 2026-07-06 | $2.45M |
| JOLANDA MARIE HOWE | 2026-07-01 | $327K |
| Howe Jolanda | 2026-06-17 | $264K |
| BJERKHOLT ERIC | 2026-06-08 | $469K |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
1
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| JANUS HENDERSON GROUP Ltd. | 13G/A | 2026-08-13 | 9.7% |
1
Filings (14d)
Mirum Pharmaceuticals issued a press release on August 5, 2026, announcing its financial results and corporate update for the quarter ended June 30, 2026. The release is attached as Exhibit 99.1 to this 8-K, but the excerpt doesn't include any specific numbers.
View Full Filing (SEC EDGAR)604749101
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,239
Total reported value
$2.2T
3224 13F institutions increased their position this quarter
Institutions Holding
5,987
Total reported value
$3.6T
3028 13F institutions increased their position this quarter
Institutions Holding
6,149
Total reported value
$1.8T
2966 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
6,136
Total reported value
$2.9T
Held by 6136 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
5,803
Total reported value
$1.8T
Held by 5803 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
5,246
Total reported value
$1.3T
Held by 5246 institutions — one of the most-tracked stocks on AlphaSMO
Access MIRM's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/MIRMCLI
npx alphasmo stocks get MIRM