Mirum Pharmaceuticals, Inc.
DE ˙ DB ˙ US6047491013
77,12 € ↑0,96 (1,26%)
2026-06-05
DEL PRIS
SecurityDE:08D / Mirum Pharmaceuticals, Inc.
InstitutionWellington Management Group Llp
Latest Disclosed Ownership1,334,809 shares
Latest Disclosed Value $ 123,309,658
Wellington Management Group Llp reports 7.83% increase in ownership of 08D / Mirum Pharmaceuticals, Inc.

On May 15, 2026 - Wellington Management Group Llp filed a 13F-HR form disclosing ownership of 1,334,809 shares of Mirum Pharmaceuticals, Inc. (DE:08D) valued at $100,110,675 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,237,830 shares of Mirum Pharmaceuticals, Inc.. This represents a change in shares of 7.83% during the quarter. The current value of the position is $102,940,470 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 1,334,809 96,979 7.83 123,310 26.11 0.0033
2026-02-17 2025-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 1,237,830 447,141 56.55 97,776 68.68 0.0171
2025-11-14 2025-09-30 13F MIRUM PHARMACEUTICALS COM 604749101 790,689 672,118 566.85 57,965 860.64 0.0101
2025-08-14 2025-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 118,571 5,647 5.00 6,034 18.62 0.0011
2025-05-13 2025-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 112,924 -5,277 -4.46 5,087 4.09 0.0010
2025-02-12 2024-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 118,201 -4,133 -3.38 4,888 2.43 0.0009
2024-11-14 2024-09-30 13F MIRUM PHARMACEUTICALS COM 604749101 122,334 46,918 62.21 4,771 85.07 0.0008
2024-08-14 2024-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 75,416 4,974 7.06 2,578 45.73 0.0005
2024-05-15 2024-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 70,442 70,442 1,770 0.0003
2023-08-14 2023-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 0 -154,750 -100.00 0 -100.00
2023-05-12 2023-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 154,750 98 0.06 3,717 23.28 0.0007
2023-02-13 2022-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 154,652 -10,746 -6.50 3,016 -13.24 0.0006
2022-11-14 2022-09-30 13F MIRUM PHARMACEUTICALS COM 604749101 165,398 -12,098 -6.82 3,475 0.61 0.0007
2022-08-15 2022-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 177,496 0 0.00 3,454 -11.64 0.0007
2022-05-16 2022-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 177,496 -715 -0.40 3,909 37.50 0.0007
2022-02-11 2021-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 178,211 -186,489 -51.13 2,843 -60.87 0.0005
2021-11-15 2021-09-30 13F MIRUM PHARMACEUTICALS COM 604749101 364,700 18,700 5.40 7,265 21.45 0.0012
2021-08-16 2021-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 346,000 238,300 221.26 5,982 180.19 0.0010
2021-05-17 2021-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 107,700 22,300 26.11 2,135 43.19 0.0004
2021-02-12 2020-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 85,400 85,400 1,491 0.0003
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.