Mark Ein
Insider
Activist
First SEC filing: Oct. 21, 2025 · Latest: June 2, 2026
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 |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 8, 2026 | LIND | A | 3,240 | · | · | 331,842 Direct | +0.99% | Acquired | (price as of 2026-10-02) |
| May 29, 2026 | LIND | J | 300,000 | · | · | 300,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| May 8, 2026 | LIND | J | 1,000,000 | · | · | 1,000,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| April 1, 2026 | CTOS | A | 19,225 | · | · | 19,225 Direct | · | Acquired | (price as of 2026-10-02) |
| March 31, 2026 | CTOS | M | 26,859 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 31, 2026 | CTOS | M | 26,859 | · | · | 5,166,178 Direct | +0.52% | Acquired | (price as of 2026-10-02) |
| Oct. 17, 2025 | CTOS | J | 3,670,279 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 8, 2025 | LIND | A | 8,899 | $12.36 | $109,992 | 328,602 Direct | +2.78% | Acquired | 181.4% (price as of 2026-10-02) |
| April 1, 2025 | CTOS | A | 26,859 | · | · | 26,859 Direct | · | Acquired | (price as of 2026-10-02) |
| March 31, 2025 | CTOS | M | 22,218 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 31, 2025 | CTOS | M | 22,218 | · | · | 1,585,707 Direct | +1.42% | Acquired | (price as of 2026-10-02) |
| Aug. 8, 2024 | LIND | A | 14,647 | $7.51 | $109,999 | 319,703 Direct | +4.80% | Acquired | 363.1% (price as of 2026-10-02) |
| July 31, 2024 | CTOS | D | 1,832,810 | · | · | 3,670,276 Indirect | -33.31% | Disposed | (price as of 2026-10-02) |
| April 1, 2024 | CTOS | A | 22,218 | · | · | 22,218 Direct | · | Acquired | (price as of 2026-10-02) |
| March 31, 2024 | CTOS | M | 18,640 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 31, 2024 | CTOS | M | 18,640 | · | · | 1,563,489 Direct | +1.21% | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2023 | LIND | A | 2,329 | · | · | 305,056 Direct | +0.77% | Acquired | (price as of 2026-10-02) |
| Dec. 20, 2023 | LIND | G | 100,000 | · | · | 3,005,117 Indirect | -3.22% | Disposed | (price as of 2026-10-02) |
| Nov. 10, 2023 | CTOS | P | 100,000 | $4.96 | $496,000 | 1,544,849 Direct | +6.92% | Acquired | 97.2% (price as of 2026-10-02) |
| Sept. 30, 2023 | LIND | A | 3,645 | · | · | 302,727 Direct | +1.22% | Acquired | (price as of 2026-10-02) |
| Aug. 8, 2023 | LIND | A | 8,276 | · | · | 299,082 Direct | +2.85% | Acquired | (price as of 2026-10-02) |
| June 30, 2023 | LIND | A | 2,412 | · | · | 290,806 Direct | +0.84% | Acquired | (price as of 2026-10-02) |
| June 22, 2023 | LIND | J | 46,157 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 22, 2023 | LIND | J | 46,157 | · | · | 3,105,117 Indirect | -1.46% | Disposed | (price as of 2026-10-02) |
| June 21, 2023 | LIND | J | 46,157 | · | · | 46,157 Indirect | -50.00% | Disposed | (price as of 2026-10-02) |
| June 21, 2023 | LIND | J | 46,157 | · | · | 3,151,274 Indirect | -1.44% | Disposed | (price as of 2026-10-02) |
| June 20, 2023 | LIND | J | 46,156 | · | · | 92,314 Indirect | -33.33% | Disposed | (price as of 2026-10-02) |
| June 20, 2023 | LIND | J | 46,156 | · | · | 3,197,431 Indirect | -1.42% | Disposed | (price as of 2026-10-02) |
| June 16, 2023 | LIND | J | 46,156 | · | · | 138,470 Indirect | -25.00% | Disposed | (price as of 2026-10-02) |
| June 16, 2023 | LIND | J | 46,156 | · | · | 3,243,587 Indirect | -1.40% | Disposed | (price as of 2026-10-02) |
| June 15, 2023 | LIND | J | 46,156 | · | · | 184,626 Indirect | -20.00% | Disposed | (price as of 2026-10-02) |
| June 15, 2023 | LIND | J | 46,156 | · | · | 3,289,743 Indirect | -1.38% | Disposed | (price as of 2026-10-02) |
| June 14, 2023 | LIND | J | 46,156 | · | · | 230,782 Indirect | -16.67% | Disposed | (price as of 2026-10-02) |
| June 14, 2023 | LIND | J | 46,156 | · | · | 3,335,899 Indirect | -1.36% | Disposed | (price as of 2026-10-02) |
| June 13, 2023 | LIND | J | 46,156 | · | · | 276,938 Indirect | -14.29% | Disposed | (price as of 2026-10-02) |
| June 13, 2023 | LIND | J | 46,156 | · | · | 3,382,055 Indirect | -1.35% | Disposed | (price as of 2026-10-02) |
| June 12, 2023 | LIND | J | 46,156 | · | · | 323,094 Indirect | -12.50% | Disposed | (price as of 2026-10-02) |
| June 12, 2023 | LIND | J | 46,156 | · | · | 3,428,211 Indirect | -1.33% | Disposed | (price as of 2026-10-02) |
| June 9, 2023 | LIND | J | 49,700 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 9, 2023 | LIND | J | 49,700 | · | · | 3,474,367 Indirect | -1.41% | Disposed | (price as of 2026-10-02) |
| June 8, 2023 | LIND | J | 49,700 | · | · | 49,700 Indirect | -50.00% | Disposed | (price as of 2026-10-02) |
| June 8, 2023 | LIND | J | 49,700 | · | · | 3,524,067 Indirect | -1.39% | Disposed | (price as of 2026-10-02) |
| June 7, 2023 | LIND | J | 49,700 | · | · | 99,400 Indirect | -33.33% | Disposed | (price as of 2026-10-02) |
| June 7, 2023 | LIND | J | 49,700 | · | · | 3,573,767 Indirect | -1.37% | Disposed | (price as of 2026-10-02) |
| June 6, 2023 | LIND | J | 49,700 | · | · | 149,100 Indirect | -25.00% | Disposed | (price as of 2026-10-02) |
| June 6, 2023 | LIND | J | 49,700 | · | · | 3,623,467 Indirect | -1.35% | Disposed | (price as of 2026-10-02) |
| June 5, 2023 | LIND | J | 49,700 | · | · | 198,800 Indirect | -20.00% | Disposed | (price as of 2026-10-02) |
| June 5, 2023 | LIND | J | 49,700 | · | · | 3,673,167 Indirect | -1.33% | Disposed | (price as of 2026-10-02) |
| June 5, 2023 | CTOS | G | 39,100 | · | · | 5,503,086 Indirect | -0.71% | Disposed | (price as of 2026-10-02) |
| June 2, 2023 | LIND | J | 49,700 | · | · | 248,500 Indirect | -16.67% | Disposed | (price as of 2026-10-02) |
| June 2, 2023 | LIND | J | 49,700 | · | · | 3,722,867 Indirect | -1.32% | Disposed | (price as of 2026-10-02) |
| June 1, 2023 | LIND | J | 49,700 | · | · | 298,200 Indirect | -14.29% | Disposed | (price as of 2026-10-02) |
| June 1, 2023 | LIND | J | 49,700 | · | · | 3,772,567 Indirect | -1.30% | Disposed | (price as of 2026-10-02) |
| May 31, 2023 | LIND | J | 49,700 | · | · | 347,900 Indirect | -12.50% | Disposed | (price as of 2026-10-02) |
| May 31, 2023 | LIND | J | 49,700 | · | · | 3,822,267 Indirect | -1.28% | Disposed | (price as of 2026-10-02) |
| May 30, 2023 | LIND | J | 49,700 | · | · | 397,600 Indirect | -11.11% | Disposed | (price as of 2026-10-02) |
| May 30, 2023 | LIND | J | 49,700 | · | · | 3,871,967 Indirect | -1.27% | Disposed | (price as of 2026-10-02) |
| May 26, 2023 | LIND | J | 49,700 | · | · | 447,300 Indirect | -10.00% | Disposed | (price as of 2026-10-02) |
| May 26, 2023 | LIND | J | 49,700 | · | · | 3,921,667 Indirect | -1.25% | Disposed | (price as of 2026-10-02) |
| May 25, 2023 | LIND | J | 49,700 | · | · | 497,000 Indirect | -9.09% | Disposed | (price as of 2026-10-02) |
| May 25, 2023 | LIND | J | 49,700 | · | · | 3,971,367 Indirect | -1.24% | Disposed | (price as of 2026-10-02) |
| May 24, 2023 | CTOS | G | 164,100 | · | · | 5,542,186 Indirect | -2.88% | Disposed | (price as of 2026-10-02) |
| May 24, 2023 | LIND | J | 49,700 | · | · | 546,700 Indirect | -8.33% | Disposed | (price as of 2026-10-02) |
| May 24, 2023 | LIND | J | 49,700 | · | · | 4,021,067 Indirect | -1.22% | Disposed | (price as of 2026-10-02) |
| May 23, 2023 | LIND | J | 49,700 | · | · | 596,400 Indirect | -7.69% | Disposed | (price as of 2026-10-02) |
| May 23, 2023 | LIND | J | 49,700 | · | · | 4,070,767 Indirect | -1.21% | Disposed | (price as of 2026-10-02) |
| May 22, 2023 | LIND | J | 49,700 | · | · | 646,100 Indirect | -7.14% | Disposed | (price as of 2026-10-02) |
| May 22, 2023 | LIND | J | 49,700 | · | · | 4,120,467 Indirect | -1.19% | Disposed | (price as of 2026-10-02) |
| May 19, 2023 | LIND | J | 49,700 | · | · | 695,800 Indirect | -6.67% | Disposed | (price as of 2026-10-02) |
| May 19, 2023 | LIND | J | 49,700 | · | · | 4,170,167 Indirect | -1.18% | Disposed | (price as of 2026-10-02) |
| May 18, 2023 | LIND | J | 49,700 | · | · | 745,500 Indirect | -6.25% | Disposed | (price as of 2026-10-02) |
| May 18, 2023 | LIND | J | 49,700 | · | · | 4,219,867 Indirect | -1.16% | Disposed | (price as of 2026-10-02) |
| May 17, 2023 | LIND | J | 49,700 | · | · | 795,200 Indirect | -5.88% | Disposed | (price as of 2026-10-02) |
| May 17, 2023 | LIND | J | 49,700 | · | · | 4,269,567 Indirect | -1.15% | Disposed | (price as of 2026-10-02) |
| May 16, 2023 | LIND | J | 49,700 | · | · | 844,900 Indirect | -5.56% | Disposed | (price as of 2026-10-02) |
| May 16, 2023 | LIND | J | 49,700 | · | · | 4,319,267 Indirect | -1.14% | Disposed | (price as of 2026-10-02) |
| May 15, 2023 | LIND | J | 49,700 | · | · | 894,600 Indirect | -5.26% | Disposed | (price as of 2026-10-02) |
| May 15, 2023 | LIND | J | 49,700 | · | · | 4,368,967 Indirect | -1.12% | Disposed | (price as of 2026-10-02) |
| May 12, 2023 | LIND | J | 49,700 | · | · | 944,300 Indirect | -5.00% | Disposed | (price as of 2026-10-02) |
| May 12, 2023 | LIND | J | 49,700 | · | · | 4,418,667 Indirect | -1.11% | Disposed | (price as of 2026-10-02) |
| May 11, 2023 | LIND | J | 49,700 | · | · | 994,000 Indirect | -4.76% | Disposed | (price as of 2026-10-02) |
| May 11, 2023 | LIND | J | 49,700 | · | · | 4,468,367 Indirect | -1.10% | Disposed | (price as of 2026-10-02) |
| May 10, 2023 | LIND | J | 49,700 | · | · | 1,043,700 Indirect | -4.55% | Disposed | (price as of 2026-10-02) |
| May 10, 2023 | LIND | J | 49,700 | · | · | 4,518,067 Indirect | -1.09% | Disposed | (price as of 2026-10-02) |
| May 9, 2023 | LIND | J | 49,700 | · | · | 1,093,400 Indirect | -4.35% | Disposed | (price as of 2026-10-02) |
| May 9, 2023 | LIND | J | 49,700 | · | · | 4,567,767 Indirect | -1.08% | Disposed | (price as of 2026-10-02) |
| May 8, 2023 | LIND | J | 49,700 | · | · | 1,143,100 Indirect | -4.17% | Disposed | (price as of 2026-10-02) |
| May 8, 2023 | LIND | J | 49,700 | · | · | 4,617,467 Indirect | -1.06% | Disposed | (price as of 2026-10-02) |
| May 5, 2023 | LIND | J | 49,700 | · | · | 1,192,800 Indirect | -4.00% | Disposed | (price as of 2026-10-02) |
| May 5, 2023 | LIND | J | 49,700 | · | · | 4,667,167 Indirect | -1.05% | Disposed | (price as of 2026-10-02) |
| April 1, 2023 | CTOS | A | 18,640 | · | · | 18,640 Direct | · | Acquired | (price as of 2026-10-02) |
| March 31, 2023 | CTOS | M | 14,315 | · | · | 1,444,849 Direct | +1.00% | Acquired | (price as of 2026-10-02) |
| March 31, 2023 | CTOS | M | 14,315 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 31, 2023 | LIND | A | 2,745 | · | · | 288,394 Direct | +0.96% | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2022 | LIND | A | 3,409 | · | · | 285,649 Direct | +1.21% | Acquired | (price as of 2026-10-02) |
| Sept. 30, 2022 | LIND | A | 2,883 | · | · | 282,240 Direct | +1.03% | Acquired | (price as of 2026-10-02) |
| Aug. 8, 2022 | LIND | A | 9,615 | · | · | 279,357 Direct | +3.56% | Acquired | (price as of 2026-10-02) |
| June 30, 2022 | LIND | A | 3,240 | · | · | 269,742 Direct | +1.22% | Acquired | (price as of 2026-10-02) |
| May 16, 2022 | CTOS | P | 50,000 | $5.79 | $289,500 | 1,415,534 Direct | +3.66% | Acquired | 68.9% (price as of 2026-10-02) |
| May 13, 2022 | CTOS | P | 351,903 | $5.91 | $2,079,747 | 1,365,534 Direct | +34.72% | Acquired | 65.5% (price as of 2026-10-02) |
Showing latest 100 of 141 transactions
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.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| May 29, 2026 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | · | 300,000 | Acquired |
| May 8, 2026 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | · | 1,000,000 | Acquired |
| April 1, 2026 | CTOS | Restricted Stock Unit | Common Stock | · | · | 19,225 | Acquired |
| March 31, 2026 | CTOS | Restricted Stock Unit | Common Stock | · | · | 26,859 | Disposed |
| April 1, 2025 | CTOS | Restricted Stock Unit | Common Stock | · | · | 26,859 | Acquired |
| March 31, 2025 | CTOS | Restricted Stock Unit | Common Stock | · | · | 22,218 | Disposed |
| April 1, 2024 | CTOS | Restricted Stock Unit | Common Stock | · | · | 22,218 | Acquired |
| March 31, 2024 | CTOS | Restricted Stock Unit | Common Stock | · | · | 18,640 | Disposed |
| June 22, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 22, 2023 | 46,157 | Disposed |
| June 21, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 21, 2023 | 46,157 | Disposed |
| June 20, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 20, 2023 | 46,156 | Disposed |
| June 16, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 16, 2023 | 46,156 | Disposed |
| June 15, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 15, 2023 | 46,156 | Disposed |
| June 14, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 14, 2023 | 46,156 | Disposed |
| June 13, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 13, 2023 | 46,156 | Disposed |
| June 12, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 12, 2023 | 46,156 | Disposed |
| June 9, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 9, 2023 | 49,700 | Disposed |
| June 8, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 8, 2023 | 49,700 | Disposed |
| June 7, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 7, 2023 | 49,700 | Disposed |
| June 6, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 6, 2023 | 49,700 | Disposed |
| June 5, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 5, 2023 | 49,700 | Disposed |
| June 2, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 2, 2023 | 49,700 | Disposed |
| June 1, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | June 1, 2023 | 49,700 | Disposed |
| May 31, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 31, 2023 | 49,700 | Disposed |
| May 30, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 30, 2023 | 49,700 | Disposed |
| May 26, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 26, 2023 | 49,700 | Disposed |
| May 25, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 25, 2023 | 49,700 | Disposed |
| May 24, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 24, 2023 | 49,700 | Disposed |
| May 23, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 23, 2023 | 49,700 | Disposed |
| May 22, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 22, 2023 | 49,700 | Disposed |
| May 19, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 19, 2023 | 49,700 | Disposed |
| May 18, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 18, 2023 | 49,700 | Disposed |
| May 17, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 17, 2023 | 49,700 | Disposed |
| May 16, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 16, 2023 | 49,700 | Disposed |
| May 15, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 15, 2023 | 49,700 | Disposed |
| May 12, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 12, 2023 | 49,700 | Disposed |
| May 11, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 11, 2023 | 49,700 | Disposed |
| May 10, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 10, 2023 | 49,700 | Disposed |
| May 9, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 9, 2023 | 49,700 | Disposed |
| May 8, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 8, 2023 | 49,700 | Disposed |
| May 5, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | May 5, 2023 | 49,700 | Disposed |
| April 1, 2023 | CTOS | Restricted Stock Unit | Common Stock | · | · | 18,640 | Acquired |
| March 31, 2023 | CTOS | Restricted Stock Unit | Common Stock | · | · | 14,315 | Disposed |
| April 29, 2022 | CTOS | Restricted Stock Unit | Common Stock | · | · | 14,315 | Acquired |
| April 1, 2022 | CTOS | Restricted Stock Unit | Common Stock | · | · | 13,631 | Disposed |
| June 2, 2021 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | · | 369,250 | Acquired |
| May 19, 2021 | LIND | Prepaid Variable Forward Sale Contract | Common Stock | · | · | 1,242,500 | Acquired |
| April 1, 2021 | CTOS | Restricted Stock Unit | Common Stock | · | · | 13,631 | Acquired |
| June 11, 2020 | CTOS | Stock Options | Common Stock | $4.00 | June 11, 2030 | 20,000 | Acquired |
| July 31, 2019 | CTOS | Warrants | Common Stock | $11.50 | · | 625,851 | Disposed |
| July 31, 2019 | CTOS | Warrants | Common Stock | $11.50 | · | 625,851 | Acquired |
| July 31, 2019 | CTOS | Convertible Promissory Note [F6] | Warrants | $1.50 | · | · | Disposed |
| July 31, 2019 | CTOS | Warrants | Common Stock | $11.50 | · | 66,924 | Disposed |
| July 30, 2019 | CTOS | Warrants | Class A ordinary shares | $11.50 | · | 1,564,627 | Disposed |
| July 30, 2019 | CTOS | Class B Ordinary Shares | Common Stock | · | · | 5,049,592 | Disposed |
| July 30, 2019 | CTOS | Class B Ordinary Shares | Common Stock | · | · | 1,537,074 | Disposed |
| Aug. 21, 2017 | CTOS | Warrants [F1] | Class A ordinary shares | $11.50 | · | 466,667 | Acquired |
| Nov. 21, 2012 | TWOD | Warrants | Common Stock | $11.00 | Nov. 7, 2013 | 3,040,000 | Disposed |
| Aug. 9, 2011 | TWOD | Warrants | Common stock | $11.00 | Nov. 7, 2013 | 0 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.