Perspective Therapeutics, Inc. (CATX) Insider Ownership

Historic Insider Ownership Trends

As of March 23, 2026, Perspective Therapeutics's top three insider holders are Alpha Therapy, Llc Lantheus (TenPercentOwner, 116.77Mn shares), Markus Puhlmann (Chief Medical Officer, 1.38Mn shares), Lori A Woods (Director, 183.46K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Alpha Therapy, Llc Lantheus 116,773,394 0 08 Mar, 2024
Markus Puhlmann Chief Medical Officer 1,375,425 0 26 Jan, 2024
Lori A Woods 0 183,460 01 Apr, 2025
Robert F Iii Williamson 108,982 0 01 Apr, 2025
Mark John Austin Vp Finance/Prin Finacct Offic 84,030 0 24 Apr, 2024
Jennifer Streeter Coo Vp Of Hr 77,940 0 22 Sep, 2022
Johan M. Spoor Chief Executive Officer 59,383 4,650 01 Apr, 2025
Jonathan Robert Hunt Chief Accounting Officer 59,800 0 17 Nov, 2025
Juan Graham Chief Financial Officer 35,354 0 01 Apr, 2025
Heidi Henson 0 25,975 06 Dec, 2024
Robert F Iii Williamson 0 9,864 14 Nov, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
02 Mar, 2026 Heidi Henson Stock option (right to buy) A 50,000 $0.00 50,000 D A
02 Mar, 2026 Maria E Martinez Stock option (right to buy) A 50,000 $0.00 50,000 D A
02 Mar, 2026 Johan M. Spoor Stock option (right to buy) A 735,000 $0.00 735,000 D A
02 Mar, 2026 Robert F Iii Williamson Stock option (right to buy) A 50,000 $0.00 50,000 D A
02 Mar, 2026 Markus Puhlmann Stock option (right to buy) A 150,000 $0.00 150,000 D A
02 Mar, 2026 Lori A Woods Stock option (right to buy) A 50,000 $0.00 50,000 D A
02 Mar, 2026 Frank Morich Stock option (right to buy) A 50,000 $0.00 50,000 D A
02 Mar, 2026 Jonathan Robert Hunt Stock option (right to buy) A 90,000 $0.00 90,000 D A
13 Nov, 2025 Jonathan Robert Hunt Common Stock A 11,000 $2.03 59,800 D P
12 Nov, 2025 Robert F Iii Williamson Common Stock A 9,498 $2.10 9,864 I P
03 Sep, 2025 Maria E Martinez Stock option (right to buy) A 75,000 $0.00 75,000 D A
04 Sep, 2025 Joel Sendek Stock option (right to buy) A 600,000 $0.00 600,000 D A
28 Mar, 2025 Juan Graham Common Stock A 33,333 $2.25 35,354 D P
31 Mar, 2025 Lori A Woods Common Stock A 23,475 $2.13 183,460 I P
28 Mar, 2025 Robert F Iii Williamson Common Stock A 22,192 $2.27 70,837 D P
28 Mar, 2025 Johan M. Spoor Common Stock A 22,026 $2.24 59,383 D P
28 Mar, 2025 Johan M. Spoor Common Stock A 4,650 $2.21 4,650 I P
31 Mar, 2025 Robert F Iii Williamson Common Stock A 38,145 $2.14 108,982 D P
03 Mar, 2025 Markus Puhlmann Stock option (right to buy) A 165,000 $0.00 165,000 D A
03 Mar, 2025 Lori A Woods Stock option (right to buy) A 50,000 $0.00 50,000 D A