Mirum Pharmaceuticals, Inc.
DE ˙ DB ˙ US6047491013
76,16 € ↓ -0,96 (-1,24%)
2026-06-04
DEL PRIS
SecurityDE:08D / Mirum Pharmaceuticals, Inc.
InstitutionFirst Turn Management, LLC
Latest Disclosed Ownership400,464 shares
Latest Disclosed Value $ 36,994,864
First Turn Management, LLC reports 16.84% decrease in ownership of 08D / Mirum Pharmaceuticals, Inc.

On May 15, 2026 - First Turn Management, LLC filed a 13F-HR form disclosing ownership of 400,464 shares of Mirum Pharmaceuticals, Inc. (DE:08D) valued at $30,034,800 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 481,564 shares of Mirum Pharmaceuticals, Inc.. This represents a change in shares of -16.84% during the quarter. The current value of the position is $30,499,338 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 400,464 -81,100 -16.84 36,995 -2.74 4.1330
2026-02-13 2025-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 481,564 -89,005 -15.60 38,039 -9.06 4.3463
2025-11-14 2025-09-30 13F MIRUM PHARMACEUTICALS COM 604749101 570,569 43,029 8.16 41,828 55.81 6.2806
2025-08-14 2025-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 527,540 24,526 4.88 26,847 18.47 5.0084
2025-05-15 2025-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 503,014 -3,894 -0.77 22,661 8.11 4.5682
2025-02-14 2024-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 506,908 -140,703 -21.73 20,961 -17.01 3.7542
2024-11-07 2024-09-30 13F MIRUM PHARMACEUTICALS COM 604749101 647,611 -55,787 -7.93 25,257 5.02 3.9988
2024-08-08 2024-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 703,398 -255,256 -26.63 24,049 -0.13 3.9122
2024-05-06 2024-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 958,654 122,352 14.63 24,081 -2.45 3.6026
2024-02-08 2023-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 836,302 836,302 24,688 3.5454
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.