Mark Culhane
Insider
First SEC filing: July 12, 2024 · Latest: July 12, 2024
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Oct. 1, 2025 | GNSS | A | 6,411 | · | · | 114,547 Direct | +5.93% | Acquired | (price as of 2026-10-02) |
| March 17, 2025 | GNSS | A | 38,136 | · | · | 108,136 Direct | +54.48% | Acquired | (price as of 2026-10-02) |
| Aug. 19, 2024 | GNSS | P | 613 | $2.70 | $1,655 | 70,000 Direct | +0.88% | Acquired | -46.3% (price as of 2026-10-02) |
| Aug. 16, 2024 | GNSS | P | 31,800 | $2.67 | $84,906 | 69,387 Direct | +84.60% | Acquired | -45.7% (price as of 2026-10-02) |
| Aug. 15, 2024 | GNSS | P | 17,587 | $2.65 | $46,606 | 37,587 Direct | +87.94% | Acquired | -45.3% (price as of 2026-10-02) |
| July 10, 2024 | GNSS | A | 20,000 | · | · | 20,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 27, 2021 | TDC | S | 3,957 | $48.42 | $191,598 | 270,107 Direct | -1.44% | Disposed | -37.8% (price as of 2026-10-02) |
| March 1, 2021 | TDC | F | 17,405 | $42.13 | $733,273 | 274,064 Direct | -5.97% | Disposed | -28.5% (price as of 2026-10-02) |
| March 1, 2021 | TDC | F | 10,443 | $42.13 | $439,964 | 291,469 Direct | -3.46% | Disposed | -28.5% (price as of 2026-10-02) |
| March 1, 2021 | TDC | F | 3,845 | $42.13 | $161,990 | 301,912 Direct | -1.26% | Disposed | -28.5% (price as of 2026-10-02) |
| March 1, 2021 | TDC | A | 28,334 | · | · | 305,757 Direct | +10.21% | Acquired | (price as of 2026-10-02) |
| March 1, 2021 | TDC | S 10b5-1 | 9,029 | $40.03 | $361,431 | 277,423 Direct | -3.15% | Disposed | -24.7% (price as of 2026-10-02) |
| Feb. 26, 2021 | TDC | F | 6,633 | $41.03 | $272,152 | 286,452 Direct | -2.26% | Disposed | -26.5% (price as of 2026-10-02) |
| Feb. 25, 2021 | TDC | A | 15,662 | $41.03 | $642,612 | 293,085 Direct | +5.65% | Acquired | -26.5% (price as of 2026-10-02) |
| Feb. 1, 2021 | TDC | F | 45,647 | $27.82 | $1,269,900 | 277,423 Direct | -14.13% | Disposed | 8.3% (price as of 2026-10-02) |
| Feb. 1, 2021 | TDC | A | 93,136 | · | · | 323,070 Direct | +40.51% | Acquired | (price as of 2026-10-02) |
| Nov. 25, 2020 | TDC | S | 7,050 | $21.80 | $153,690 | 16,750 Indirect | -29.62% | Disposed | 38.3% (price as of 2026-10-02) |
| March 12, 2020 | TDC | P | 1,200 | $18.92 | $22,704 | 229,934 Direct | +0.52% | Acquired | 59.3% (price as of 2026-10-02) |
| March 11, 2020 | TDC | P | 550 | $19.80 | $10,890 | 23,800 Indirect | +2.37% | Acquired | 52.2% (price as of 2026-10-02) |
| March 11, 2020 | TDC | P | 8,400 | $19.78 | $166,152 | 23,250 Indirect | +56.57% | Acquired | 52.4% (price as of 2026-10-02) |
| March 2, 2020 | TDC | F | 3,796 | $20.87 | $79,223 | 228,734 Direct | -1.63% | Disposed | 44.4% (price as of 2026-10-02) |
| March 1, 2020 | TDC | A | 105,309 | · | · | 232,530 Direct | +82.78% | Acquired | (price as of 2026-10-02) |
| March 1, 2020 | TDC | A | 63,186 | · | · | 127,221 Direct | +98.67% | Acquired | (price as of 2026-10-02) |
| Nov. 11, 2019 | TDC | P | 7,800 | $26.00 | $202,800 | 14,850 Indirect | +110.64% | Acquired | 15.9% (price as of 2026-10-02) |
| Nov. 11, 2019 | TDC | P | 1,950 | $26.00 | $50,700 | 64,035 Direct | +3.14% | Acquired | 15.9% (price as of 2026-10-02) |
| May 7, 2019 | TDC | P | 4,600 | $38.03 | $174,938 | 62,085 Direct | +8.00% | Acquired | -20.7% (price as of 2026-10-02) |
| May 6, 2019 | TDC | P | 3,050 | $38.56 | $117,608 | 7,050 Indirect | +76.25% | Acquired | -21.8% (price as of 2026-10-02) |
| May 6, 2019 | TDC | P | 1,400 | $39.35 | $55,090 | 57,485 Direct | +2.50% | Acquired | -23.4% (price as of 2026-10-02) |
| March 1, 2019 | TDC | A | 23,261 | · | · | 60,085 Direct | +63.17% | Acquired | (price as of 2026-10-02) |
| Nov. 5, 2018 | TDC | P | 4,000 | $35.09 | $140,360 | 4,000 Indirect | · | Acquired | -14.1% (price as of 2026-10-02) |
| Nov. 5, 2018 | TDC | P | 2,900 | $35.14 | $101,906 | 32,824 Direct | +9.69% | Acquired | -14.2% (price as of 2026-10-02) |
| Nov. 5, 2018 | TDC | P | 6,900 | $35.11 | $242,259 | 36,824 Direct | +23.06% | Acquired | -14.2% (price as of 2026-10-02) |
| Dec. 1, 2017 | TDC | P | 4,500 | $37.66 | $169,470 | 29,924 Direct | +17.70% | Acquired | -20.0% (price as of 2026-10-02) |
| Nov. 27, 2017 | TDC | A | 25,424 | · | · | 25,424 Direct | · | Acquired | (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.