InsidersTradesSigma
Total declarations
Companies
▲ Purchases (3 ops.)
▼ Sales (0 ops.)
Insider track record
CEODisclosed buys
3
Disclosed sells
0
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Browse the full record of transactions filed by Weiss Michael S, Chief Executive Officer. Insider active across 4 companies, notably Checkpoint Therapeutics, Inc.. In total, 29 reports have been published. Breakdown: 3 buys · 0 sell. Total volume traded: €2.1m. History available since 10 June 2021. The latest transaction was disclosed on 18 March 2026 (Attribution). Regulator: SEC (Form 4). All data is free.
Companies and markets linked to Weiss Michael S
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations29 total
475,424 shares0common stock, par value $0.001SEC:0001038977-26-000002:0
622,000 shares0Common StockSEC:0001437749-26-001016:0
3,865,126 shares0Common StockSEC:0001437749-25-033888:0
12,195 shares0COMMON STOCKSEC:0001104659-25-054698:0
50,000 shares@ US$1.29100.0% of flowCOMMON STOCKSEC:0001104659-25-054698:1
187,007 sharesCOMMON STOCKSEC:0001104659-25-054698:2
750,000 shares0Common StockSEC:0001437749-25-002292:0
454,153 shares0common stock, par value $0.001SEC:0001415889-25-000402:0
12,638 shares0COMMON STOCKSEC:0001104659-24-129528:0
32,051 shares0COMMON STOCKSEC:0001104659-24-062667:0
1,001,908 shares0Common StockSEC:0001437749-24-000899:0
216,465 shares0COMMON STOCK, PAR VALUE $0.001SEC:0001104659-24-000900:0
147,058 shares@ US$1.7020.1% of flowCOMMON STOCK, PAR VALUE $0.001SEC:0001104659-23-119186:0
Canonical exit: 12 Feb 2024 (T+90)
100,000 shares@ US$10.13100.0% of flowCOMMON STOCKSEC:0001104659-23-091054:0
Canonical exit: 9 Nov 2023 (T+90)
7,246 shares0COMMON STOCK, PAR VALUE $0.0001SEC:0001104659-23-079112:0
17,483 shares0COMMON STOCKSEC:0001104659-23-071761:0
71,664 shares0COMMON STOCK, PAR VALUE $0.0001SEC:0001104659-23-040923:0
985,000 shares0COMMON STOCKSEC:0001104659-23-032337:0
1,197,604 shares@ US$0.83579.9% of flowCOMMON STOCK, PAR VALUE $0.001SEC:0001104659-23-021628:0
Canonical exit: 11 May 2023 (T+90)
1,219,294 shares0COMMON STOCK, PAR VALUE $0.001SEC:0001104659-23-001101:0
47,619 shares0COMMON STOCKSEC:0001104659-22-074464:0
1,102,986 shares0Common StockSEC:0001104659-22-053619:0
3,000 shares0COMMON STOCKSEC:0001104659-22-002355:0
13,774 shares0COMMON STOCKSEC:0001104659-21-090246:0
1,080,770 shares0COMMON STOCKSEC:0001104659-21-084261:0
25 of 29 declarations
About Weiss Michael S
WEISS MICHAEL S is Directeur Général and appears in 29 filings in total. Across the 29 sampled filings, the recorded activity consists of buys only, for a total of EUR 2086951, with no sells, and the observed period runs from 2016-01-04 to 2026-03-20. He is listed at TG Therapeutics, INC., Fortress Biotech, Inc., Checkpoint Therapeutics, Inc., and Mustang Bio, INC.
