James N. Topper

Sits on 4 boards. Last updated September 28, 2026

Time on boards

Boards served
4
Current seats
4
Board service
10 years
Director since
2023

10 years of board service in total across 4 boards, counting each seat separately. Longest: AnaptysBio Inc., 3 years.

AnaptysBio Inc. Director
3 years · Since 2023
3 years · Since 2023
2 years · Since 2023
1 month · Since 2026

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
May 19, 2026 Phathom Pharmaceuticals Inc. Grant or award +24,122 — —
Sep 15, 2025 NewAmsterdam Pharma Company N.V. Open-market purchase +660 $23.70 $15,642
Sep 8, 2025 NewAmsterdam Pharma Company N.V. Open-market purchase +1,260 $24.99 $31,487
Aug 11, 2025 NewAmsterdam Pharma Company N.V. Open-market purchase +471 $23.98 $11,295
Jun 25, 2025 NewAmsterdam Pharma Company N.V. Open-market purchase +1,260 $18.26 $23,008
Jun 24, 2025 NewAmsterdam Pharma Company N.V. Open-market purchase +2,520 $18.43 $46,444
Jun 16, 2025 NewAmsterdam Pharma Company N.V. Open-market purchase +8,584 $19.50 $167,388
Jun 3, 2025 Phathom Pharmaceuticals Inc. Grant or award +10,500 — —
May 21, 2025 Phathom Pharmaceuticals Inc. Open-market purchase +3,780 $3.86 $14,591
May 14, 2025 Phathom Pharmaceuticals Inc. Open-market purchase +6,300 $3.32 $20,916
May 13, 2025 Phathom Pharmaceuticals Inc. Open-market purchase +1,120 $3.16 $3,539
May 12, 2025 Phathom Pharmaceuticals Inc. Open-market purchase +12,601 $3.04 $38,307
May 9, 2025 Phathom Pharmaceuticals Inc. Open-market purchase +33,376 $3.19 $106,469
May 9, 2025 Phathom Pharmaceuticals Inc. Open-market purchase +2,226 $3.62 $8,058
Mar 26, 2025 NewAmsterdam Pharma Company N.V. Open-market purchase +1,135 $22.49 $25,526

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