Mark Ein
CIK 1246840 · View on SEC EDGAR ↗
Insider
Activist
First SEC filing: Oct. 21, 2025 · Latest: June 2, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 97 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
97 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 10, 2023 | CTOS | P | 100,000 | $4.96 | $496,000 | 1,544,849 Direct | +6.92% | Acquired | 105.2% (price as of 2026-08-18) |
| May 16, 2022 | CTOS | P | 50,000 | $5.79 | $289,500 | 1,415,534 Direct | +3.66% | Acquired | 75.8% (price as of 2026-08-18) |
| May 13, 2022 | CTOS | P | 351,903 | $5.91 | $2,079,747 | 1,365,534 Direct | +34.72% | Acquired | 72.3% (price as of 2026-08-18) |
Showing latest 100 of 119 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) | — | — | 300,000 | Acquired |
| May 8, 2026 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (1,000,000) | — | — | 1,000,000 | Acquired |
| April 1, 2026 | CTOS | Restricted Stock Unit | Common Stock (19,225) | — | — | 19,225 | Acquired |
| March 31, 2026 | CTOS | Restricted Stock Unit | Common Stock (26,859) | — | — | 26,859 | Disposed |
| April 1, 2025 | CTOS | Restricted Stock Unit | Common Stock (26,859) | — | — | 26,859 | Acquired |
| March 31, 2025 | CTOS | Restricted Stock Unit | Common Stock (22,218) | — | — | 22,218 | Disposed |
| April 1, 2024 | CTOS | Restricted Stock Unit | Common Stock (22,218) | — | — | 22,218 | Acquired |
| March 31, 2024 | CTOS | Restricted Stock Unit | Common Stock (18,640) | — | — | 18,640 | Disposed |
| June 22, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (46,157) | — | June 22, 2023 | 46,157 | Disposed |
| June 21, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (46,157) | — | June 21, 2023 | 46,157 | Disposed |
| June 20, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (46,156) | — | June 20, 2023 | 46,156 | Disposed |
| June 16, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (46,156) | — | June 16, 2023 | 46,156 | Disposed |
| June 15, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (46,156) | — | June 15, 2023 | 46,156 | Disposed |
| June 14, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (46,156) | — | June 14, 2023 | 46,156 | Disposed |
| June 13, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (46,156) | — | June 13, 2023 | 46,156 | Disposed |
| June 12, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (46,156) | — | June 12, 2023 | 46,156 | Disposed |
| June 9, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | June 9, 2023 | 49,700 | Disposed |
| June 8, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | June 8, 2023 | 49,700 | Disposed |
| June 7, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | June 7, 2023 | 49,700 | Disposed |
| June 6, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | June 6, 2023 | 49,700 | Disposed |
| June 5, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | June 5, 2023 | 49,700 | Disposed |
| June 2, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | June 2, 2023 | 49,700 | Disposed |
| June 1, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | June 1, 2023 | 49,700 | Disposed |
| May 31, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 31, 2023 | 49,700 | Disposed |
| May 30, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 30, 2023 | 49,700 | Disposed |
| May 26, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 26, 2023 | 49,700 | Disposed |
| May 25, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 25, 2023 | 49,700 | Disposed |
| May 24, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 24, 2023 | 49,700 | Disposed |
| May 23, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 23, 2023 | 49,700 | Disposed |
| May 22, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 22, 2023 | 49,700 | Disposed |
| May 19, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 19, 2023 | 49,700 | Disposed |
| May 18, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 18, 2023 | 49,700 | Disposed |
| May 17, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 17, 2023 | 49,700 | Disposed |
| May 16, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 16, 2023 | 49,700 | Disposed |
| May 15, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 15, 2023 | 49,700 | Disposed |
| May 12, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 12, 2023 | 49,700 | Disposed |
| May 11, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 11, 2023 | 49,700 | Disposed |
| May 10, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 10, 2023 | 49,700 | Disposed |
| May 9, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 9, 2023 | 49,700 | Disposed |
| May 8, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 8, 2023 | 49,700 | Disposed |
| May 5, 2023 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (49,700) | — | May 5, 2023 | 49,700 | Disposed |
| April 1, 2023 | CTOS | Restricted Stock Unit | Common Stock (18,640) | — | — | 18,640 | Acquired |
| March 31, 2023 | CTOS | Restricted Stock Unit | Common Stock (14,315) | — | — | 14,315 | Disposed |
| April 29, 2022 | CTOS | Restricted Stock Unit | Common Stock (14,315) | — | — | 14,315 | Acquired |
| April 1, 2022 | CTOS | Restricted Stock Unit | Common Stock (13,631) | — | — | 13,631 | Disposed |
| June 2, 2021 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (369,250) | — | — | 369,250 | Acquired |
| May 19, 2021 | LIND | Prepaid Variable Forward Sale Contract | Common Stock (1,242,500) | — | — | 1,242,500 | Acquired |
| April 1, 2021 | CTOS | Restricted Stock Unit | Common Stock (13,631) | — | — | 13,631 | Acquired |
| July 31, 2019 | CTOS | Warrants | Common Stock (625,851) | $11.50 | — | 625,851 | Disposed |
| July 31, 2019 | CTOS | Warrants | Common Stock (625,851) | $11.50 | — | 625,851 | Acquired |
| July 31, 2019 | CTOS | Convertible Promissory Note [F6] | Warrants (625,851) | $1.50 | — | — | Disposed |
| July 31, 2019 | CTOS | Warrants | Common Stock (66,924) | $11.50 | — | 66,924 | Disposed |
| July 30, 2019 | CTOS | Warrants | Class A ordinary shares (1,564,627) | $11.50 | — | 1,564,627 | Disposed |
| July 30, 2019 | CTOS | Class B Ordinary Shares | Common Stock (5,049,592) | — | — | 5,049,592 | Disposed |
| July 30, 2019 | CTOS | Class B Ordinary Shares | Common Stock (1,537,074) | — | — | 1,537,074 | Disposed |
| Aug. 21, 2017 | CTOS | Warrants [F1] | Class A ordinary shares (466,667) | $11.50 | — | 466,667 | Acquired |
| Aug. 9, 2011 | TWOD | Warrants | Common stock (3,040,000) | $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.