Peter Altabef
CEO at Unisys Corporation
Sits on 2 boards. Last updated September 27, 2026
Time on boards
- Boards served
- 2
- Current seats
- 2
- Board service
- 7 years
- Director since
- 2023
7 years of board service in total across 2 boards, counting each seat separately. Longest: Unisys Corporation, 3 years.
Chief executive roles
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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NiSource Inc May 11, 202698.6%
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NiSource Inc May 12, 202599.3%
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Unisys Corporation May 8, 202598.4%
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NiSource Inc May 13, 202499.0%
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Unisys Corporation May 1, 202498.6%
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NiSource Inc May 23, 202397.2%
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Unisys Corporation May 5, 202398.2%
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 11, 2026 | NiSource Inc | Grant or award | +3,807 | $47.03 | $179,043 |
| Feb 27, 2026 | Unisys Corporation | Grant or award | +82,305 | — | — |
| May 12, 2025 | NiSource Inc | Grant or award | +4,541 | $38.32 | $174,011 |
| Apr 1, 2025 | Unisys Corporation | Grant or award | +44,248 | — | — |
| Mar 31, 2025 | Unisys Corporation | Shares withheld for tax | −49,183 | $4.59 | $225,750 |
| Mar 31, 2025 | Unisys Corporation | Shares withheld for tax | −27,406 | $4.59 | $125,794 |
| Feb 28, 2025 | Unisys Corporation | Shares withheld for tax | −15,555 | $4.31 | $67,042 |
| Feb 28, 2025 | Unisys Corporation | Shares withheld for tax | −27,406 | $4.31 | $118,120 |
| Feb 26, 2025 | Unisys Corporation | Shares withheld for tax | −32,184 | $4.41 | $141,931 |
| Feb 26, 2025 | Unisys Corporation | Shares withheld for tax | −24,591 | $4.41 | $108,446 |
| Feb 25, 2025 | Unisys Corporation | Shares withheld for tax | −6,365 | $4.30 | $27,370 |
| Feb 11, 2025 | Unisys Corporation | Grant or award | +39,530 | — | — |
| Feb 11, 2025 | Unisys Corporation | Grant or award | +81,790 | — | — |
| May 13, 2024 | NiSource Inc | Grant or award | +6,042 | $28.80 | $174,010 |
| Feb 28, 2024 | Unisys Corporation | Shares withheld for tax | −41,069 | $5.28 | $216,844 |
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