Catalyst Pharmaceuticals, Inc.
US ˙ NasdaqCM ˙ US14888U1016

SecurityCPRX / Catalyst Pharmaceuticals, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership1,237,752 shares
Latest Disclosed Value $ 30,646,739
Northern Trust Corp reports 2.13% increase in ownership of CPRX / Catalyst Pharmaceuticals, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 1,237,752 shares of Catalyst Pharmaceuticals, Inc. (US:CPRX) valued at $30,646,740 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,211,973 shares of Catalyst Pharmaceuticals, Inc.. This represents a change in shares of 2.13% during the quarter. The current value of the position is $38,729,260 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)
2026-05-14 2026-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,237,752 25,779 2.13 30,647 8.34 0.0008
2026-02-17 2025-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,211,973 -51,915 -4.11 28,287 13.61 0.0007
2025-11-14 2025-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,263,888 -11,202 -0.88 24,899 -10.01 0.0007
2025-08-13 2025-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,275,090 -211,108 -14.20 27,669 -23.23 0.0038
2025-05-13 2025-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,486,198 -17,368 -1.16 36,040 14.85 0.0054
2025-02-14 2024-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,503,566 119,766 8.65 31,379 14.07 0.0044
2024-11-13 2024-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,383,800 -2,907 -0.21 27,510 28.07 0.0045
2024-08-14 2024-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,386,707 -43,041 -3.01 21,480 -5.75 0.0036
2024-05-14 2024-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,429,748 11,007 0.78 22,790 -4.44 0.0039
2024-02-13 2023-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,418,741 -18,424 -1.28 23,849 41.96 0.0043
2023-11-13 2023-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,437,165 30,262 2.15 16,800 -11.15 0.0033
2023-08-11 2023-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,406,903 14,248 1.02 18,909 -18.11 0.0036
2023-05-15 2023-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,392,655 -1,659 -0.12 23,090 -10.97 0.0046
2023-02-13 2022-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,394,314 27,453 2.01 25,934 47.89 0.0054
2022-11-14 2022-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,366,861 50,729 3.85 17,536 90.07 0.0040
2022-08-12 2022-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,316,132 -3,761 -0.28 9,226 -15.68 0.0020
2022-05-13 2022-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,319,893 -58,547 -4.25 10,942 17.25 0.0019
2022-02-08 2021-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,378,440 -47,263 -3.32 9,332 23.49 0.0015
2021-11-15 2021-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,425,703 1,555 0.11 7,557 -7.72 0.0013
2021-08-13 2021-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,424,148 249,975 21.29 8,189 51.31 0.0014
2021-05-12 2021-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,174,173 -78,168 -6.24 5,412 29.35 0.0010
2021-02-11 2020-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,252,341 -77,290 -5.81 4,184 5.95 0.0008
2020-11-16 2020-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,329,631 -49,069 -3.56 3,949 -38.01 0.0009
2020-08-14 2020-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,378,700 147,737 12.00 6,370 34.42 0.0015
2020-05-14 2020-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,230,963 -4,958 -0.40 4,739 2.27 0.0014
2020-02-14 2019-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,235,921 45,009 3.78 4,634 -26.71 0.0010
2019-11-13 2019-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,190,912 33,170 2.87 6,323 42.28 0.0015
2019-08-13 2019-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,157,742 30,398 2.70 4,444 -22.70 0.0011
2019-05-13 2019-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,127,344 -1,297 -0.11 5,749 165.30 0.0014
2019-02-12 2018-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,128,641 -25,697 -2.23 2,167 -50.33 0.0006
2018-11-14 2018-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,154,338 46,394 4.19 4,363 26.17 0.0011
2018-09-18 2018-06-30 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,107,944 97,997 9.70 3,458 43.25 0.0009
2018-08-14 2018-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,114,601 104,654 3,478
2018-05-09 2018-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,009,947 185,639 22.52 2,414 -25.10 0.0006
2018-02-14 2017-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 824,308 12,795 1.58 3,223 57.60 0.0008
2017-11-13 2017-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 811,513 8,947 1.11 2,045 -7.67 0.0005
2017-08-11 2017-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 802,566 691,238 620.90 2,215 920.74 0.0006
2017-05-12 2017-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 111,328 10,932 10.89 217 106.67 0.0001
2017-02-13 2016-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 100,396 -27,188 -21.31 105 -24.46 0.0000
2016-11-09 2016-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 127,584 37,217 41.18 139 117.19 0.0000
2016-08-12 2016-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 90,367 -673,453 -88.17 64 -92.83 0.0000
2016-08-19 2016-03-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 763,820 -288 -0.04 893 -52.32 0.0003
2016-05-13 2016-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 763,820 893
2016-02-12 2015-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 764,108 595 0.08 1,873 -18.25 0.0006
2015-11-12 2015-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 763,513 621,185 436.45 2,291 289.63 0.0008
2015-08-13 2015-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 142,328 45,899 47.60 588 40.67 0.0004
2015-05-14 2015-03-31 13F CATALYST PHARM PARTNERS COM 14888U101 96,429 -525 -0.54 418 45.14 0.0001
2015-02-12 2014-12-31 13F CATALYST PHARM PARTNERS COM 14888U101 96,954 7,540 8.43 288 -3.03 0.0001
2014-11-13 2014-09-30 13F CATALYST PHARM PARTNERS COM 14888U101 89,414 -2,228 -2.43 297 28.02 0.0001
2014-08-14 2014-06-30 13F CATALYST PHARM PARTNERS COM 14888U101 91,642 14,856 19.35 232 33.33 0.0001
2014-05-14 2014-03-31 13F CATALYST PHARM PARTNERS COM 14888U101 76,786 10,743 16.27 174 34.88 0.0001
2014-02-21 2013-12-31 13F/A-1 CATALYST PHARM PARTNERS COM 14888U101 66,043 10,158 18.18 129 -24.56 0.0000
2014-02-12 2013-12-31 13F CATALYST PHARM PARTNERS COM 14888U101 66,043 129
2013-11-13 2013-09-30 13F CATALYST PHARM PARTNERS COM 14888U101 55,885 12,979 30.25 171 350.00 0.0001
2013-08-09 2013-06-30 13F CATALYST PHARM PARTNERS COM 14888U101 42,906 42,906 38 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.