Catalyst Pharmaceuticals, Inc.
US ˙ NasdaqCM ˙ US14888U1016

SecurityCPRX / Catalyst Pharmaceuticals, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership3,429,615 shares
Latest Disclosed Value $ 84,907,655
Dimensional Fund Advisors Lp reports 14.46% increase in ownership of CPRX / Catalyst Pharmaceuticals, Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 3,429,615 shares of Catalyst Pharmaceuticals, Inc. (US:CPRX) valued at $84,917,267 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 2,996,297 shares of Catalyst Pharmaceuticals, Inc.. This represents a change in shares of 14.46% during the quarter. The current value of the position is $107,244,061 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)
2026-05-07 2026-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 3,429,615 433,318 14.46 84,908 21.41 0.0038
2026-02-12 2025-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,996,297 538,128 21.89 69,933 44.42 0.0147
2025-11-12 2025-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 2,458,169 550,648 28.87 48,424 16.98 0.0104
2025-08-12 2025-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,907,521 -279,901 -12.80 41,395 -21.97 0.0096
2025-05-13 2025-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,187,422 -825,610 -27.40 53,046 -15.64 0.0132
2025-02-13 2024-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 3,013,032 -5,757 -0.19 62,884 4.79 0.0151
2024-11-07 2024-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 3,018,789 18,033 0.60 60,011 29.12 0.0146
2024-08-09 2024-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 3,000,756 263,099 9.61 46,479 6.51 0.0121
2024-05-10 2024-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,737,657 135,860 5.22 43,638 -0.23 0.0118
2024-02-07 2023-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,601,797 41,923 1.64 43,738 46.15 0.0128
2023-11-09 2023-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 2,559,874 87,464 3.54 29,926 -9.94 0.0098
2023-08-09 2023-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 2,472,410 97,902 4.12 33,230 -15.60 0.0106
2023-05-12 2023-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,374,508 65,803 2.85 39,369 93,635.71 0.0133
2023-02-09 2022-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,308,705 165,138 7.70 43 -99.85 0.0127
2022-11-10 2022-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 2,143,567 -99,081 -4.42 27,502 74.94 0.0106
2022-08-12 2022-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 2,242,648 97,394 4.54 15,721 -11.60 0.0056
2022-05-13 2022-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,145,254 241,686 12.70 17,784 37.99 0.0055
2022-02-09 2021-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,903,568 149,594 8.53 12,888 38.67 0.0039
2021-11-12 2021-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,753,974 293,033 20.06 9,294 10.63 0.0030
2021-08-12 2021-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,460,941 274,474 23.13 8,401 53.81 0.0027
2021-05-14 2021-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,186,467 500,706 73.01 5,462 138.41 0.0018
2021-03-08 2020-12-31 13F/A-2 CATALYST PHARMACEUTICALS COM 14888U101 685,761 -1,473 -0.21 2,291 12.14 0.0008
2021-02-11 2020-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 685,761 -1,473 2,291 827.3874
2020-11-12 2020-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 687,234 45,004 7.01 2,043 -31.14 0.0009
2020-08-13 2020-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 642,230 95,868 17.55 2,967 41.08 0.0013
2020-05-14 2020-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 546,362 125,342 29.77 2,103 33.27 0.0011
2020-02-14 2019-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 421,020 16,990 4.21 1,578 -26.43 0.0006
2019-11-12 2019-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 404,030 0 0.00 2,145 38.30 0.0008
2019-08-13 2019-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 404,030 -3,200 -0.79 1,551 -25.32 0.0006
2019-08-12 2019-03-31 13F/A-2 CATALYST PHARMACEUTICALS COM 14888U101 407,230 -6,290 -1.52 2,077 161.26 0.0008
2019-05-10 2019-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 407,230 -6,290 2,077
2019-02-26 2018-12-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 413,520 151,738 57.96 795 -19.70 0.0004
2019-02-13 2018-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 413,520 151,738 795
2018-11-13 2018-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 261,782 261,782 990 0.0004
2015-08-14 2015-06-30 13F CATALYST PHARM PARTNERS COM 14888U101 0 -46,438 -100.00 0 -100.00
2015-05-14 2015-03-31 13F CATALYST PHARM PARTNERS COM 14888U101 46,438 0 0.00 201 45.65 0.0001
2015-02-06 2014-12-31 13F CATALYST PHARM PARTNERS COM 14888U101 46,438 0 0.00 138 -10.39 0.0001
2014-11-13 2014-09-30 13F CATALYST PHARM PARTNERS COM 14888U101 46,438 0 0.00 154 31.62 0.0001
2014-08-08 2014-06-30 13F CATALYST PHARM PARTNERS COM 14888U101 46,438 0 0.00 117 11.43 0.0001
2014-05-14 2014-03-31 13F CATALYST PHARM PARTNERS COM 14888U101 46,438 0 0.00 105 15.38 0.0001
2014-02-12 2013-12-31 13F CATALYST PHARM PARTNERS COM 14888U101 46,438 0 0.00 91 -35.92 0.0001
2013-11-13 2013-09-30 13F CATALYST PHARM PARTNERS COM 14888U101 46,438 0 0.00 142 246.34 0.0001
2013-08-15 2013-06-30 13F CATALYST PHARM PARTNERS COM 14888U101 46,438 46,438 41 0.0000
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.