Gregory L. Summe
Sits on 5 boards. Overboarded · 5 public boards Last updated September 27, 2026
Time on boards
- Boards served
- 5
- Current seats
- 5
- Board service
- 15 years
- Director since
- 2023
15 years of board service in total across 5 boards, counting each seat separately. Longest: Avantor Inc., 3 years.
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Wheels Up Experience Inc. June 9, 202699.9%
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Avantor Inc. May 7, 202687.0%
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Avantor Inc. May 8, 202593.7%
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State Street Corporation May 15, 202493.8%
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Avantor Inc. May 9, 202491.2%
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State Street Corporation May 17, 202393.7%
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Avantor Inc. May 11, 202396.5%
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 |
|---|---|---|---|---|---|
| Jul 15, 2026 | GRAIL Inc. | Grant or award | +427 | $74.36 | $31,752 |
| Jun 18, 2026 | GRAIL Inc. | Grant or award | +5,491 | $63.74 | $349,996 |
| Jun 10, 2026 | NXP Semiconductors N.V. | Option exercise | +1,035 | — | — |
| Jun 10, 2026 | NXP Semiconductors N.V. | Shares withheld for tax | −513 | $297.41 | $152,571 |
| Jun 9, 2026 | Wheels Up Experience Inc. | Grant or award | +24,305 | — | — |
| May 7, 2026 | Avantor Inc. | Grant or award | +25,270 | — | — |
| Apr 15, 2026 | GRAIL Inc. | Grant or award | +631 | $49.79 | $31,417 |
| Feb 12, 2026 | Avantor Inc. | Open-market purchase | +100,000 | $9.40 | $940,000 |
| Jan 15, 2026 | GRAIL Inc. | Grant or award | +329 | $97.44 | $32,058 |
| Oct 30, 2025 | Avantor Inc. | Open-market purchase | +100,000 | $11.25 | $1,125,000 |
| Oct 15, 2025 | GRAIL Inc. | Grant or award | +425 | $75.52 | $32,096 |
| Aug 21, 2025 | Avantor Inc. | Open-market purchase | +100,000 | $12.56 | $1,256,000 |
| Jul 15, 2025 | GRAIL Inc. | Grant or award | +825 | $38.53 | $31,787 |
| Jun 10, 2025 | Wheels Up Experience Inc. | Grant or award | +148,026 | — | — |
| May 29, 2025 | NXP Semiconductors N.V. | Option exercise | +822 | — | — |
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