Alan D. Sobel
CIK 1639386 · View on SEC EDGAR ↗
Insider
First SEC filing: April 13, 2015 · Latest: April 13, 2015
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 24 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
24 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Dec. 13, 2023 | CTSO | P | 7,894 | — | — | 7,894 Direct | — | Acquired | (price as of 2026-08-20) |
| Dec. 13, 2023 | CTSO | P | 22,557 | $1.33 | $30,001 | 101,857 Direct | +28.45% | Acquired | -72.9% (price as of 2026-08-20) |
| May 11, 2022 | CTSO | P | 8,800 | $2.02 | $17,776 | 79,300 Direct | +12.48% | Acquired | -82.2% (price as of 2026-08-20) |
| May 11, 2022 | CTSO | P | 1,200 | $2.00 | $2,400 | 70,500 Direct | +1.73% | Acquired | -82.0% (price as of 2026-08-20) |
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 |
|---|---|---|---|---|---|---|---|
| Aug. 8, 2025 | CTSO | Stock Option (Right to Buy) | Common Stock (22,000) | $1.00 | Aug. 8, 2035 | 22,000 | Acquired |
| Feb. 24, 2025 | CTSO | Series A Right Warrants (right to buy) [F1] | Common Stock (21,950) | — | Feb. 24, 2025 | 21,950 | Disposed |
| Jan. 17, 2025 | CTSO | Series B Right Warrants [F1] | Common Stock (21,950) | — | April 10, 2025 | 21,950 | Acquired |
| Jan. 17, 2025 | CTSO | Series A Right Warrants [F1] | Common Stock (21,950) | — | Feb. 24, 2025 | 21,950 | Acquired |
| Jan. 17, 2025 | CTSO | Subscription Rights (right to buy) | Common Stock (21,950) | $1.00 | Jan. 10, 2025 | 21,950 | Disposed |
| April 2, 2024 | CTSO | Stock Option (Right to Buy) | Common Stock (22,000) | $0.96 | April 2, 2034 | 22,000 | Acquired |
| Dec. 13, 2023 | CTSO | Common Stock Warrant (Right to Buy) | Common Stock (7,894) | $2.00 | Dec. 13, 2028 | 7,894 | Acquired |
| July 7, 2023 | CTSO | Stock Option (right to buy) | Common Stock (20,000) | $3.53 | July 7, 2033 | 20,000 | Acquired |
| Aug. 10, 2022 | CTSO | Stock Option (right to buy) | Common Stock (18,975) | $1.95 | Aug. 10, 2032 | 18,975 | Acquired |
| April 12, 2021 | CTSO | Stock Option (right to buy) | Common Stock (17,250) | $8.99 | April 12, 2031 | 17,250 | Acquired |
| Feb. 28, 2020 | CTSO | Stock Option (right to buy) | Common Stock (15,000) | $6.03 | Feb. 28, 2030 | 15,000 | Acquired |
| July 22, 2019 | CTSO | Stock Option (right to buy) | Common Stock (15,000) | $7.33 | July 22, 2029 | 15,000 | Acquired |
| March 15, 2018 | CTSO | Stock Option (right to buy) | Common Stock (14,450) | $7.90 | March 15, 2028 | 14,450 | Acquired |
| Feb. 24, 2017 | CTSO | Stock Option (right to buy) | Common Stock (13,750) | $5.60 | Feb. 24, 2027 | 13,750 | Acquired |
| June 7, 2016 | CTSO | Stock Option (right to buy) | Common Stock (12,000) | $4.69 | June 7, 2026 | 12,000 | Acquired |
| April 8, 2015 | CTSO | Stock Option (right to buy) | Common Stock (6,000) | $8.07 | April 8, 2025 | 6,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| April 13, 2015 | CTSO | Common Stock | 0 | Direct |