Southwell David P (CIK 0001251553)

Latest company ownership

Shares held
100,000
Last filed at
Feb 6, 2023
Confidence Score
50.0
2025Q4
Confidence Score History
2021Q3 2025Q4
Shares held
23,944
Last filed at
Jun 20, 2024
Confidence Score
50.0
2025Q4
Confidence Score History
2017Q1 2025Q4
Shares held
12,000
Last filed at
Sep 11, 2025
Confidence Score
44.4
2025Q4
Confidence Score History
2014Q1 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Sep 9, 2025 Sep 11, 2025 PTC THERAPEUTICS, INC. Director Sell 20.0 -12,000 -41.59% ✗ $700.1K
Apr 12, 2024 Apr 16, 2024 ROCKET PHARMACEUTICALS, INC. Director Sell 17.5 -80,000 -20.23% ✗ $1.9M
Apr 17, 2023 Apr 19, 2023 PTC THERAPEUTICS, INC. Director Sell 7.5 -11,429 -52.12% ✓ $583.2K
Mar 31, 2023 Apr 4, 2023 PTC THERAPEUTICS, INC. Director Sell 20.0 -2,571 -19.67% ✓ $128.7K
Mar 27, 2023 Mar 29, 2023 PTC THERAPEUTICS, INC. Director Sell 7.5 -10,000 -48.78% ✓ $451K
May 18, 2022 May 20, 2022 TScan Therapeutics, Inc. CEO Buy 95.0 +25,000 17.06% ✗ $89.8K
Sep 8, 2021 Sep 9, 2021 TScan Therapeutics, Inc. CEO Buy 95.0 +11,000 12.66% ✗ $96.1K
Oct 16, 2020 Oct 20, 2020 PTC THERAPEUTICS, INC. Director Sell 5.0 -27,000 -77.59% ✓ $1.4M
Dec 13, 2018 Dec 14, 2018 ROCKET PHARMACEUTICALS, INC. Director Sell 20.0 -38,768 -28.95% ✗ $588.9K
Nov 28, 2018 Dec 10, 2018 ROCKET PHARMACEUTICALS, INC. Director Sell 20.0 -57,732 -30.12% ✗ $873.5K
Jan 6, 2017 Jan 9, 2017 ROCKET PHARMACEUTICALS, INC. CEO Buy 95.0 +60,000 2169.98% ✗ $105K
Jul 6, 2015 Jul 6, 2015 PTC THERAPEUTICS, INC. Director Sell 5.0 -23,604 -100.00% ✓ $1.1M
Mar 23, 2015 Mar 23, 2015 PTC THERAPEUTICS, INC. Director Sell 15.0 -2,317 -21.22% ✓ $160K
Mar 21, 2014 Mar 24, 2014 PTC THERAPEUTICS, INC. Director Sell 20.0 -2,317 -17.50% ✓ $71.7K