Time on boards
- Boards served
- 3
- Current seats
- 3
- Board service
- 10 years
- Director since
- 2023
10 years of board service in total across 3 boards, counting each seat separately. Longest: Arista Networks 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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Arista Networks Inc. May 29, 202663.3%
-
Nutanix Inc. December 12, 202597.4%
-
Nutanix Inc. December 10, 202498.5%
-
Nutanix Inc. December 8, 202399.0%
-
Arista Networks Inc. June 14, 202368.2%
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 |
|---|---|---|---|---|---|
| Nov 2, 2026 | Arista Networks Inc. | Open-market sale | −1,400 | $164.07 | $229,694 |
| Nov 2, 2026 | Arista Networks Inc. | Open-market sale | −1,200 | $165.00 | $198,004 |
| Nov 2, 2026 | Arista Networks Inc. | Open-market sale | −900 | $166.36 | $149,728 |
| Nov 2, 2026 | Arista Networks Inc. | Open-market sale | −1,000 | $167.41 | $167,405 |
| Nov 2, 2026 | Arista Networks Inc. | Open-market sale | −500 | $168.85 | $84,424 |
| Oct 1, 2026 | Arista Networks Inc. | Open-market sale | −700 | $201.62 | $141,137 |
| Oct 1, 2026 | Arista Networks Inc. | Open-market sale | −500 | $202.90 | $101,449 |
| Oct 1, 2026 | Arista Networks Inc. | Open-market sale | −1,800 | $204.45 | $368,001 |
| Oct 1, 2026 | Arista Networks Inc. | Open-market sale | −1,800 | $205.58 | $370,036 |
| Oct 1, 2026 | Arista Networks Inc. | Open-market sale | −200 | $206.03 | $41,206 |
| Sep 8, 2026 | Arista Networks Inc. | Open-market sale | −1,300 | $195.27 | $253,851 |
| Sep 8, 2026 | Arista Networks Inc. | Open-market sale | −700 | $196.20 | $137,340 |
| Sep 8, 2026 | Arista Networks Inc. | Open-market sale | −1,000 | $197.46 | $197,460 |
| Sep 8, 2026 | Arista Networks Inc. | Open-market sale | −1,700 | $198.44 | $337,348 |
| Sep 8, 2026 | Arista Networks Inc. | Open-market sale | −300 | $199.32 | $59,796 |
Questions about Mark B. Templeton
What boards is Mark B. Templeton on?
Mark B. Templeton sits on the boards of Arista Networks Inc., Health Catalyst Inc and Nutanix Inc.
How long has Mark B. Templeton served on boards?
Our records show at least 10 years of board service across 3 boards, the earliest from 2023.
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