James Samuel Shannon

Sits on 3 boards. Last updated September 28, 2026

Time on boards

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

7 years of board service in total across 3 boards, counting each seat separately. Longest: MannKind Corporation, 3 years.

3 years · Since 2023
2 years · Since 2024
7 months · Since 2026

Shareholder support

Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

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
Mar 26, 2026 Xilio Therapeutics Inc. Open-market purchase +5,000 $8.79 $43,950
Mar 1, 2026 MannKind Corporation Grant or award +12,000 $3.27 $39,240
Jun 17, 2025 Xilio Therapeutics Inc. Open-market purchase +25,000 $0.69 $17,250
Jun 16, 2025 Xilio Therapeutics Inc. Open-market purchase +45,000 $0.69 $31,050

Questions about James Samuel Shannon

What boards is James Samuel Shannon on?

James Samuel Shannon sits on the boards of MannKind Corporation, ProQR Therapeutics N.V. and Xilio Therapeutics Inc.

How long has James Samuel Shannon served on boards?

Our records show at least 7 years of board service across 3 boards, the earliest from 2023.

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