Peter Altabef
CEO at Unisys Corporation
Sits on 2 boards. Last updated September 28, 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 |
Questions about Peter Altabef
What boards is Peter Altabef on?
Peter Altabef sits on the boards of NiSource Inc and Unisys Corporation.
What company is Peter Altabef the CEO of?
Peter Altabef is CEO of Unisys Corporation.
How long has Peter Altabef served on boards?
Our records show at least 7 years of board service across 2 boards, the earliest from 2023.
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