催化劑製藥公司
US ˙ NasdaqCM ˙ US14888U1016

SecurityCPRX / Catalyst Pharmaceuticals, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership2,687,299 shares
Latest Disclosed Value $ 66,537,556
Morgan Stanley reports 8.39% decrease in ownership of CPRX / Catalyst Pharmaceuticals, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 2,687,299 shares of Catalyst Pharmaceuticals, Inc. (US:CPRX) valued at $66,537,523 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 2,933,399 shares of Catalyst Pharmaceuticals, Inc.. This represents a change in shares of -8.39% during the quarter. The current value of the position is $84,085,586 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 CATALYST PHARMACEUTICALS COM 14888U101 2,687,299 -246,100 -8.39 66,538 -2.82 0.0040
2026-05-27 2025-12-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 2,933,399 1,089,775 59.11 68,466 88.51 0.0041
2026-02-13 2025-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,933,399 1,089,775 68,466 0.0041
2026-05-27 2025-09-30 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,843,624 -1,339,899 -42.09 36,319 -47.43 0.0022
2025-11-14 2025-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,843,624 -1,339,899 36,319 0.0022
2025-08-15 2025-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 3,183,523 788,968 32.95 69,082 18.97 0.0045
2025-05-15 2025-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,394,555 306,505 14.68 58,068 33.25 0.0042
2025-05-15 2024-12-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 2,088,050 264,776 14.52 43,578 20.23 0.0031
2025-02-14 2024-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,088,050 264,776 43,578 0.0031
2025-05-14 2024-09-30 13F/A-2 CATALYST PHARMACEUTICALS COM 14888U101 1,823,274 810,595 80.04 36,247 131.07 0.0026
2025-02-14 2024-09-30 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,823,274 810,595 36,247 0.0026
2024-11-14 2024-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,823,274 810,595 36,247 0.0026
2025-05-14 2024-06-30 13F/A-2 CATALYST PHARMACEUTICALS COM 14888U101 1,012,679 -786,177 -43.70 15,686 -45.29 0.0012
2024-10-17 2024-06-30 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,012,679 -786,177 15,686 0.0012
2024-08-14 2024-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,012,679 -786,177 15,686 0.0012
2024-10-17 2024-03-31 13F/A-2 CATALYST PHARMACEUTICALS COM 14888U101 1,798,856 -162,683 -8.29 28,674 -13.04 0.0023
2024-08-16 2024-03-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,798,856 -162,683 28,674 0.0003
2024-05-15 2024-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,798,856 -162,683 28,674 0.0023
2024-08-16 2023-12-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,961,539 1,048,444 114.82 32,973 208.91 0.0029
2024-02-13 2023-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,961,539 1,048,444 32,973 0.0029
2023-11-15 2023-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 913,095 19,027 2.13 10,674 -11.17 0.0011
2023-08-14 2023-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 894,068 -534,245 -37.40 12,016 -49.26 0.0012
2023-05-15 2023-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,428,313 -309,090 -17.79 23,681 -26.72 0.0025
2023-02-14 2022-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,737,403 173,258 11.08 32,316 61.02 0.0037
2022-11-14 2022-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,564,145 112,883 7.78 20,069 97.26 0.0027
2022-10-27 2022-06-30 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,451,262 209,936 16.91 10,174 -1.14 0.0013
2022-08-15 2022-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,451,262 209,936 10,174 0.0003
2022-10-27 2022-03-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,241,326 976,218 368.23 10,291 473.63 0.0014
2022-05-13 2022-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,241,326 976,218 10,291 0.0014
2022-02-14 2021-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 265,108 43,508 19.63 1,794 52.68 0.0002
2021-11-15 2021-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 221,600 -123,817 -35.85 1,175 -40.81 0.0002
2021-08-23 2021-06-30 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 345,417 253,903 277.45 1,985 370.38 0.0003
2021-08-16 2021-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 345,417 253,903 1,985 0.0001
2021-05-17 2021-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 91,514 -74,661 -44.93 422 -23.96 0.0001
2021-02-16 2020-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 166,175 -2,613,902 -94.02 555 -93.28 0.0001
2020-11-13 2020-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 2,780,077 -39,958 -1.42 8,257 -36.62 0.0016
2020-08-14 2020-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 2,820,035 107,406 3.96 13,028 24.75 0.0029
2020-05-26 2020-03-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 2,712,629 -150,696 -5.26 10,443 -2.74 0.0028
2020-05-15 2020-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,712,629 -150,696 10,443 802.2401
2020-02-14 2019-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,863,325 222,356 8.42 10,737 -23.44 0.0025
2019-11-14 2019-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 2,640,969 118,668 4.70 14,024 44.79 0.0037
2019-08-14 2019-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 2,522,301 210,511 9.11 9,686 -17.85 0.0026
2019-05-15 2019-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 2,311,790 -937,883 -28.86 11,791 88.99 0.0033
2019-02-14 2018-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 3,249,673 1,502,771 86.02 6,239 -5.53 0.0019
2019-04-23 2018-09-30 13F/A-2 CATALYST PHARMACEUTICALS COM 14888U101 1,746,902 4,428 0.25 6,604 21.46 0.0017
2018-11-20 2018-09-30 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,746,902 0 6,604 0.0017
2018-11-14 2018-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,746,902 4,428 6,604
2019-04-23 2018-06-30 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,742,474 557,090 47.00 5,437 91.92 0.0015
2018-08-14 2018-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 1,742,474 557,090 5,437
2019-04-23 2018-03-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 1,185,384 334,250 39.27 2,833 -14.87 0.0008
2018-05-14 2018-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 1,185,384 334,250 2,833
2019-04-23 2017-12-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 851,134 486,096 133.16 3,328 261.74 0.0009
2018-02-14 2017-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 851,134 486,096 3,328
2017-11-14 2017-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 365,038 266,264 269.57 920 237.00 0.0003
2017-08-11 2017-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 98,774 72,429 274.93 273 425.00 0.0001
2017-05-22 2017-03-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 26,345 13,926 112.13 52 300.00 0.0000
2017-05-12 2017-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 26,345 52
2017-02-22 2016-12-31 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 12,419 10,212 462.71 13 550.00 0.0000
2017-02-13 2016-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 12,419 13
2016-11-10 2016-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 2,207 -4,427 -66.73 2 -60.00 0.0000
2016-08-12 2016-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 6,634 -806 -10.83 5 -44.44 0.0000
2016-05-12 2016-03-31 13F CATALYST PHARMACEUTICALS COM 14888U101 7,440 -18,297 -71.09 9 -85.94 0.0000
2016-02-09 2015-12-31 13F CATALYST PHARMACEUTICALS COM 14888U101 25,737 -21,571 -45.60 64 -54.93 0.0000
2016-02-08 2015-09-30 13F/A-1 CATALYST PHARMACEUTICALS COM 14888U101 47,308 -323,205 -87.23 142 -90.73 0.0001
2015-11-09 2015-09-30 13F CATALYST PHARMACEUTICALS COM 14888U101 47,308 142
2015-08-12 2015-06-30 13F CATALYST PHARMACEUTICALS COM 14888U101 370,513 -400,218 -51.93 1,531 -54.13 0.0005
2015-05-14 2015-03-31 13F CATALYST PHARM PARTNERS COM 14888U101 770,731 108,973 16.47 3,338 69.87 0.0012
2015-02-13 2014-12-31 13F CATALYST PHARM PARTNERS COM 14888U101 661,758 -574,421 -46.47 1,965 -52.12 0.0007
2014-12-16 2014-09-30 13F/A-1 CATALYST PHARM PARTNERS COM 14888U101 1,236,179 1,233,018 39,007.21 4,104 58,528.57 0.0016
2014-11-14 2014-09-30 13F CATALYST PHARM PARTNERS COM 14888U101 1,236,179 4,104
2014-05-13 2014-03-31 13F CATALYST PHARM PARTNERS COM 14888U101 3,161 -5,540 -63.67 7 -58.82 0.0000
2014-02-13 2013-12-31 13F CATALYST PHARM PARTNERS COM 14888U101 8,701 8,701 17 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.