David P. Southwell

Sits on 3 boards. Last updated September 28, 2026

Time on boards

Boards served
3
Current seats
3
Board service
11 years
Director since
2023

11 years of board service in total across 3 boards, counting each seat separately. Longest: PTC Therapeutics Inc., 3 years.

3 years ยท Since 2023
TScan Therapeutics Inc. Director ยท Chief Executive Officer
3 years ยท Since 2023
3 years ยท Since 2023

Chief executive roles

TScan Therapeutics Inc. ยท Chief Executive Officer
Dates unknown

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Date Company Transaction Shares Price Value
Jan 3, 2025 PTC Therapeutics Inc. Grant or award +4,000 โ€” โ€”
May 8, 2024 PTC Therapeutics Inc. Gift โˆ’1,650 โ€” โ€”
May 2, 2024 Rocket Pharmaceuticals Inc. Gift โˆ’113,124 โ€” โ€”
May 2, 2024 Rocket Pharmaceuticals Inc. Gift โˆ’59,716 โ€” โ€”
Apr 15, 2024 Rocket Pharmaceuticals Inc. Option exercise +29,624 $4.34 $128,568
Apr 15, 2024 Rocket Pharmaceuticals Inc. Open-market sale โˆ’10,000 $24.05 $240,500
Apr 12, 2024 Rocket Pharmaceuticals Inc. Option exercise +70,000 $4.34 $303,800
Apr 12, 2024 Rocket Pharmaceuticals Inc. Open-market sale โˆ’59,716 $24.22 $1,446,322
Apr 12, 2024 Rocket Pharmaceuticals Inc. Open-market sale โˆ’10,284 $25.16 $258,745
Feb 15, 2024 PTC Therapeutics Inc. Grant or award +4,000 โ€” โ€”
Apr 17, 2023 PTC Therapeutics Inc. Option exercise +11,429 $18.01 $205,836
Apr 17, 2023 PTC Therapeutics Inc. Open-market sale โˆ’6,241 $50.69 $316,356
Apr 17, 2023 PTC Therapeutics Inc. Open-market sale โˆ’5,188 $51.43 $266,819
Mar 31, 2023 PTC Therapeutics Inc. Option exercise +2,571 $18.01 $46,304
Mar 31, 2023 PTC Therapeutics Inc. Open-market sale โˆ’2,571 $50.05 $128,679

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