Michael W. Wallace, COO of Spok Holdings, Inc. ($SPOK), made three open market sales of company shares over the past year, totaling $477 thousand. His latest sale occurred on August 25, 2025. These transactions rank him 6,562nd out of nearly 12,000 insiders by sale value, well below the average of $8.6 million across about six sales per insider. Wallace recorded no open market purchases in this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 4, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | F | Common Stock | 17897 | $12.14 | 74,034.0000 | 21,029,219 | 19.47% | 0.09% |
| March 4, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Unit | 30525 | $0.00 | 125,226.0000 | 21,029,219 | 19.60% | 0.15% |
| March 4, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Common Stock | 30525 | $12.14 | 82,774.0000 | 21,029,219 | 58.42% | 0.15% |
| March 4, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | A | Common Stock | 9157 | $12.14 | 91,931.0000 | 21,029,219 | 11.06% | 0.04% |
| Jan. 5, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Units | 6460 | $0.00 | 6,460.0000 | 21,029,219 | 50.00% | 0.03% |
| Jan. 5, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Common Stock | 22865 | $13.19 | 63,234.0000 | 21,029,219 | 56.64% | 0.11% |
| Jan. 5, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Unit | 10175 | $0.00 | 0.0000 | 21,029,219 | 100.00% | 0.05% |
| Jan. 5, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Units | 6230 | $0.00 | 12,461.0000 | 21,029,219 | 33.33% | 0.03% |
| Jan. 5, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | F | Common Stock | 10985 | $13.19 | 52,249.0000 | 21,029,219 | 17.37% | 0.05% |
| Jan. 2, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | A | Restricted Stock Unit | 34117 | $0.00 | 144,500.0000 | 21,029,219 | 30.91% | 0.16% |
| Jan. 2, 2026 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | A | Restricted Stock Unit | 34116 | $0.00 | 178,616.0000 | 21,029,219 | 23.61% | 0.16% |
| Aug. 25, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Common Stock | 10806 | $17.87 | 40,369.0000 | 20,565,287 | 21.12% | 0.05% |
| Aug. 25, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Restricted Stock Unit | 0 | $0.00 | 110,383.0000 | 20,565,287 | 0.00% | 0.00% |
| Aug. 4, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Common Stock | 10000 | $18.49 | 51,175.0000 | 20,565,287 | 16.35% | 0.05% |
| Aug. 4, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Restricted Stock Unit | 0 | $0.00 | 110,383.0000 | 20,565,287 | 0.00% | 0.00% |
| May 7, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Restricted Stock Unit | 0 | $0.00 | 110,383.0000 | 20,565,287 | 0.00% | 0.00% |
| May 7, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Common Stock | 6000 | $16.53 | 61,175.0000 | 20,565,287 | 8.93% | 0.03% |
| March 7, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | A | Common Stock | 10404 | $16.85 | 87,509.0000 | 20,565,287 | 13.49% | 0.05% |
| March 7, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Common Stock | 34682 | $16.85 | 77,105.0000 | 20,565,287 | 81.75% | 0.17% |
| March 7, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | F | Common Stock | 20334 | $16.85 | 67,175.0000 | 20,565,287 | 23.24% | 0.10% |
| March 7, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Unit | 34682 | $0.00 | 110,383.0000 | 20,565,287 | 23.91% | 0.17% |
| March 4, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Common Stock | 10000 | $16.53 | 42,423.0000 | 20,565,287 | 19.08% | 0.05% |
| March 4, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Restricted Stock Unit | 0 | $0.00 | 145,065.0000 | 20,565,287 | 0.00% | 0.00% |
| Jan. 3, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | A | Restricted Stock Unit | 18691 | $0.00 | 145,065.0000 | 20,565,287 | 14.79% | 0.09% |
| Jan. 3, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Common Stock | 28195 | $16.05 | 65,660.0000 | 20,565,287 | 75.26% | 0.14% |
| Jan. 3, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | F | Common Stock | 13237 | $16.05 | 52,423.0000 | 20,565,287 | 20.16% | 0.06% |
| Jan. 3, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Units | 10175 | $0.00 | 10,175.0000 | 20,565,287 | 50.00% | 0.05% |
| Jan. 3, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Unit | 11561 | $0.00 | 0.0000 | 20,565,287 | 100.00% | 0.06% |
| Jan. 3, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Units | 6459 | $0.00 | 12,920.0000 | 20,565,287 | 33.33% | 0.03% |
| Jan. 3, 2025 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | A | Restricted Stock Unit | 18692 | $0.00 | 126,374.0000 | 20,565,287 | 17.36% | 0.09% |
| Nov. 19, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Common Stock | 12000 | $15.95 | 37,465.0000 | 20,534,883 | 24.26% | 0.06% |
| Nov. 19, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Restricted Stock Unit | 0 | $0.00 | 135,877.0000 | 20,534,883 | 0.00% | 0.00% |
| Aug. 20, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Restricted Stock Unit | 0 | $0.00 | 135,877.0000 | 20,343,912 | 0.00% | 0.00% |
| Aug. 20, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Common Stock | 25000 | $14.80 | 49,465.0000 | 20,343,912 | 33.57% | 0.12% |
| March 1, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Restricted Stock Unit | 0 | $0.00 | 135,877.0000 | 20,343,912 | 0.00% | 0.00% |
| March 1, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | S | Common Stock | 40000 | $17.24 | 74,465.0000 | 20,343,912 | 34.95% | 0.20% |
| Feb. 29, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | F | Restricted Stock Unit | 647 | $0.00 | 135,877.0000 | 20,343,912 | 0.47% | 0.00% |
| Feb. 29, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Unit | 26307 | $0.00 | 136,524.0000 | 20,343,912 | 16.16% | 0.13% |
| Feb. 29, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | F | Common Stock | 11865 | $16.92 | 114,465.0000 | 20,343,912 | 9.39% | 0.06% |
| Feb. 29, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Common Stock | 26307 | $16.92 | 126,330.0000 | 20,343,912 | 26.30% | 0.13% |
| Jan. 2, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Common Stock | 30721 | $15.48 | 114,438.0000 | 20,343,912 | 36.70% | 0.15% |
| Jan. 2, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | A | Restricted Stock Unit | 19379 | $0.00 | 157,032.0000 | 20,343,912 | 14.08% | 0.10% |
| Jan. 2, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | A | Restricted Stock Unit | 19380 | $0.00 | 137,653.0000 | 20,343,912 | 16.39% | 0.10% |
| Jan. 2, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Unit | 8985 | $0.00 | 0.0000 | 20,343,912 | 100.00% | 0.04% |
| Jan. 2, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Units | 10175 | $0.00 | 20,350.0000 | 20,343,912 | 33.33% | 0.05% |
| Jan. 2, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | M | Restricted Stock Units | 11561 | $0.00 | 11,561.0000 | 20,343,912 | 50.00% | 0.06% |
| Jan. 2, 2024 | Spok Holdings, Inc | $SPOK | WALLACE MICHAEL W | Chief Operating Officer | F | Common Stock | 14415 | $15.48 | 100,023.0000 | 20,343,912 | 12.60% | 0.07% |