Mirum Pharmaceuticals Ownership | Who Owns Mirum Pharmaceuticals?
Mirum Pharmaceuticals Ownership Summary
Mirum Pharmaceuticals is owned by 121.51% institutional investors, 1.30% insiders. Janus henderson group is the largest institutional shareholder, holding 13.52% of MIRM shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.87% of its assets in Mirum Pharmaceuticals shares.
MIRM Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Mirum Pharmaceuticals | 121.51% | 1.30% | -22.81% |
| Sector | Healthcare Stocks | 245.07% | 12.10% | -157.17% |
| Industry | Biotech Stocks | 380.48% | 11.73% | -292.21% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Janus henderson group | 6.79M | 13.52% | $627.30M |
| Frazier life sciences management | 7.68M | 13.05% | $899.06M |
| Blackrock funding, inc. /de | 4.39M | 7.46% | $513.94M |
| Blackrock | 3.24M | 6.90% | $110.71M |
| Fmr | 3.67M | 6.24% | $429.68M |
| Price t rowe associates inc /md/ | 2.66M | 4.51% | $310.89M |
| Vanguard group | 2.60M | 4.47% | $205.07M |
| Vanguard capital management | 2.25M | 3.83% | $263.89M |
| State street | 2.17M | 3.69% | $254.12M |
| William blair investment management | 1.40M | 2.39% | $164.45M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Frazier life sciences management | 7.68M | 19.58% | $899.06M |
| Boone capital management | 415.64K | 11.38% | $48.66M |
| Novo | 1.13M | 7.65% | $131.70M |
| Tang capital management | 1.24M | 6.57% | $144.70M |
| Highlander partners | 122.98K | 4.83% | $14.40M |
| Patient square capital lp | 260.50K | 4.72% | $30.50M |
| Rock springs capital management lp | 798.14K | 4.56% | $93.44M |
| Octagon capital advisors lp | 338.90K | 3.57% | $39.68M |
| Healthinvest partners ab | 100.81K | 3.17% | $11.80M |
| Bvf inc/il | 1.06M | 3.16% | $123.63M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Fmr | 3.67M | 0.02% | 1.70M |
| Invesco | 1.36M | 0.01% | 1.08M |
| William blair investment management | 1.40M | 0.49% | 1.07M |
| Price t rowe associates inc /md/ | 2.66M | 0.03% | 938.19K |
| Blackrock | 3.24M | 0.00% | 785.78K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Citadel advisors | - | - | -1.05M |
| Paradigm biocapital advisors lp | - | - | -625.00K |
| Bioimpact capital | - | - | -589.58K |
| Bvf inc/il | 1.06M | 3.16% | -528.70K |
| Cadian capital management, lp | - | - | -475.71K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Sixth street partners management company | 449.43K | 0.01% | 449.43K | $52.61M |
| Norges bank | 263.18K | 0.00% | 263.18K | $20.79M |
| Axa investment managers | 255.69K | 0.05% | 255.69K | $18.74M |
| Capricorn fund managers | 101.24K | 0.93% | 101.24K | $11.85M |
| Peregrine capital management | 88.82K | 0.34% | 88.82K | $10.40M |
Sold Out
| Holder | Change |
|---|---|
| Coldstream capital management | -1.00 |
| Tortoise investment management | -2.00 |
| Ronald blue trust | -2.00 |
| Twin peaks wealth advisors | -2.00 |
| Nelson, van denburg & campbell wealth management group | -5.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 | 335 | 5.35% | 71,510,356 | 4.78% | 121 | 0.66% | 189 | 3.28% | 102 | 13.33% |
| Mar 31, 2026 | 211 | -25.96% | 24,853,219 | -59.28% | 49 | 0.45% | 120 | -25.93% | 58 | -27.50% |
| Dec 31, 2025 | 219 | -21.22% | 45,026,857 | -21.48% | 77 | 0.80% | 124 | -24.39% | 63 | -18.18% |
| Sep 30, 2025 | 99 | -54.59% | 7,010,413 | -87.34% | 14 | 0.11% | 58 | -48.21% | 28 | -64.10% |
| Jun 30, 2025 | 216 | 0.47% | 55,383,162 | 4.20% | 111 | 0.94% | 110 | -9.84% | 78 | 23.81% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 1.41M | 2.87% | 1.77K |
| Vanguard Morn Total Stk Mkt Idx Investor | 1.65M | 2.70% | -185.13K |
| Vanguard Total Stock Mkt Idx Inv | 1.65M | 2.70% | -185.13K |
| Vanguard MStar Total Stk Mkt Idx Invest | 1.65M | 2.55% | 5.84K |
| T. Rowe Price Health Sciences | 1.49M | 2.44% | 199.43K |
| Strategic Advisers Fidelity US TtlStk | 1.33M | 2.18% | 23.60K |
| iShares Russell 2000 ETF | 1.20M | 1.85% | -21.31K |
| American Funds SMALLCAP World A | 1.12M | 1.84% | 398.65K |
| Vanguard Small Cap Index | 1.19M | 1.84% | 3.02K |
| State Street® SPDR® S&P® Biotech ETF | 1.04M | 1.60% | 2.39K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Sep 14, 2026 | BJERKHOLT ERIC | CHIEF FINANCIAL OFFICER | Sell | $978.09K |
| Sep 02, 2026 | Howe Jolanda | SVP, GLOBAL CONTROLLER | Sell | $65.80K |
| Sep 01, 2026 | Peetz Christopher | CHIEF EXECUTIVE OFFICER | Sell | $815.24K |
| Sep 01, 2026 | Peetz Christopher | CHIEF EXECUTIVE OFFICER | Sell | $2.15M |
| Aug 18, 2026 | Howe Jolanda | SVP, GLOBAL CONTROLLER | Sell | $4.00M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q3 | - | 19 |
| 2026 Q2 | - | 13 |
| 2026 Q1 | 1 | 21 |
| 2025 Q4 | - | 6 |
| 2025 Q3 | - | 10 |
MIRM Ownership FAQ
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