Mirum Pharmaceuticals, Inc.
US ˙ NasdaqGM ˙ US6047491013

SecurityMIRM / Mirum Pharmaceuticals, Inc.
InstitutionBarclays Plc
Latest Disclosed Ownership142,144 shares
Latest Disclosed Value $ 11,227,955
Barclays Plc reports 22.78% increase in ownership of MIRM / Mirum Pharmaceuticals, Inc.

On February 13, 2026 - Barclays Plc filed a 13F-HR form disclosing ownership of 142,144 shares of Mirum Pharmaceuticals, Inc. (US:MIRM) valued at $11,227,955 USD as of December 31, 2025. The entity filed a previous 13F-HR/A on March 31, 2026 disclosing 115,771 shares of Mirum Pharmaceuticals, Inc.. This represents a change in shares of 22.78% during the quarter. The current value of the position is $13,053,794 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)
2026-02-13 2025-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 142,144 26,373 22.78 11,228 32.28 0.0027
2026-03-31 2025-09-30 13F/A-3 MIRUM PHARMACEUTICALS COM 604749101 115,771 -39,100 -25.25 8,487 7.69 0.0018
2026-03-19 2025-09-30 13F/A-2 MIRUM PHARMACEUTICALS COM 604749101 245,918 91,047 9,591 0.0025
2025-11-12 2025-09-30 13F MIRUM PHARMACEUTICALS COM 604749101 115,771 -39,100 8,487 0.0018
2026-02-27 2025-06-30 13F/A-2 MIRUM PHARMACEUTICALS COM 604749101 154,871 73,567 90.48 7,881 115.21 0.0018
2025-08-14 2025-06-30 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 154,871 73,567 8 0.0018
2025-08-13 2025-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 154,871 73,567 8 0.0006
2026-03-17 2025-03-31 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 81,304 -170,660 -67.73 3,663 -64.85 0.0010
2025-05-15 2025-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 81,304 -170,660 4 0.0010
2026-03-19 2024-12-31 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 251,964 6,046 2.46 10,419 8.63 0.0029
2025-02-13 2024-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 251,964 6,046 10 0.0029
2026-03-31 2024-09-30 13F/A-2 MIRUM PHARMACEUTICALS COM 604749101 245,918 10,824 4.60 9,591 19.32 0.0025
2024-11-19 2024-09-30 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 245,918 10,824 10 0.0025
2024-11-15 2024-09-30 13F MIRUM PHARMACEUTICALS COM 604749101 245,918 10,824 10 0.0008
2026-03-23 2024-06-30 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 235,094 -39,772 -14.47 8,038 16.41 0.0025
2024-08-14 2024-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 235,094 -39,772 8 0.0025
2026-03-24 2024-03-31 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 274,866 174,944 175.08 6,905 134.11 0.0024
2024-05-15 2024-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 274,866 174,944 7 0.0024
2026-03-25 2023-12-31 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 99,922 -199,198 -66.59 2,950 -68.80 0.0011
2024-02-15 2023-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 99,922 -199,198 3 0.0011
2026-03-26 2023-09-30 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 299,120 11,970 4.17 9,452 27.25 0.0059
2023-11-07 2023-09-30 13F MIRUM PHARMACEUTICALS COM 604749101 299,120 11,970 9 0.0059
2026-03-30 2023-06-30 13F/A-2 MIRUM PHARMACEUTICALS COM 604749101 287,150 -12,313 -4.11 7,429 3.27 0.0047
2023-09-20 2023-06-30 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 287,150 -12,313 7 0.0047
2023-08-03 2023-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 287,150 -12,313 7 0.0047
2026-03-30 2023-03-31 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 299,463 -78,109 -20.69 7,193 -2.30 0.0033
2023-05-04 2023-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 299,463 -78,109 7 0.0033
2026-03-30 2022-12-31 13F/A-1 MIRUM PHARMACEUTICALS COM 604749101 377,572 288,695 324.83 7,363 294.32 0.0033
2023-02-13 2022-12-31 13F MIRUM PHARMACEUTICALS COM 604749101 377,572 288,695 7 0.0033
2022-11-03 2022-09-30 13F MIRUM PHARMACEUTICALS COM 604749101 88,877 65,621 282.17 1,867 312.14 0.0020
2022-08-12 2022-06-30 13F MIRUM PHARMACEUTICALS COM 604749101 23,256 -6,063 -20.68 453 -29.88 0.0003
2022-05-16 2022-03-31 13F MIRUM PHARMACEUTICALS COM 604749101 29,319 29,319 646 0.0005
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.