Craig C Parker
Insider
First SEC filing: Feb. 12, 2014 · Latest: Aug. 20, 2021
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net: $-150,785
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 |
|---|---|---|---|---|---|---|---|---|---|
| June 15, 2026 | SRZN | A | 1,622 | $8.11 | $13,154 | 18,175 Direct | +9.80% | Acquired | 225.2% (price as of 2026-10-06) |
| May 4, 2026 | SRZN | S | 4,524 | $33.33 | $150,785 | 16,553 Direct | -21.46% | Disposed | -20.9% (price as of 2026-10-06) |
| May 1, 2026 | SRZN | M | 12,500 | · | · | 12,500 Direct | -50.00% | Disposed | (price as of 2026-10-06) |
| May 1, 2026 | SRZN | M | 12,500 | · | · | 21,077 Direct | +145.74% | Acquired | (price as of 2026-10-06) |
| Feb. 17, 2026 | SRZN | A | 242,200 | · | · | 242,200 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 17, 2026 | SRZN | A | 242,200 | · | · | 242,200 Direct | · | Acquired | (price as of 2026-10-06) |
| Dec. 15, 2025 | SRZN | A | 1,553 | $8.11 | $12,595 | 8,577 Direct | +22.11% | Acquired | 225.2% (price as of 2026-10-06) |
| June 13, 2025 | SRZN | A | 400 | $8.06 | $3,224 | 7,024 Direct | +6.04% | Acquired | 227.2% (price as of 2026-10-06) |
| May 1, 2025 | SRZN | A | 75,000 | · | · | 75,000 Direct | · | Acquired | (price as of 2026-10-06) |
| May 1, 2025 | SRZN | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-06) |
| March 24, 2025 | SRZN | D | 1,474 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| March 24, 2025 | SRZN | D | 1,603 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| March 24, 2025 | SRZN | D | 5,712 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| March 24, 2025 | SRZN | D | 5,712 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| March 24, 2025 | SRZN | A | 1,474 | · | · | 1,474 Direct | · | Acquired | (price as of 2026-10-06) |
| March 24, 2025 | SRZN | A | 1,603 | · | · | 1,603 Direct | · | Acquired | (price as of 2026-10-06) |
| Jan. 17, 2025 | SRZN | A | 100,000 | · | · | 100,000 Direct | · | Acquired | (price as of 2026-10-06) |
| June 14, 2024 | SRZN | A | 400 | $5.67 | $2,268 | 5,824 Direct | +7.37% | Acquired | 365.1% (price as of 2026-10-06) |
| May 1, 2024 | SRZN | A | 43,000 | · | · | 43,000 Direct | · | Acquired | (price as of 2026-10-06) |
| April 24, 2024 | SRZN | A | 43,000 | · | · | 43,000 Direct | · | Acquired | (price as of 2026-10-06) |
| April 4, 2024 | SRZN | P | 1,474 | · | · | 1,474 Direct | · | Acquired | (price as of 2026-10-06) |
| April 4, 2024 | SRZN | P | 1,474 | · | · | 1,474 Direct | · | Acquired | (price as of 2026-10-06) |
| April 4, 2024 | SRZN | P | 1,603 | · | · | 1,603 Direct | · | Acquired | (price as of 2026-10-06) |
| April 4, 2024 | SRZN | P | 5,712 | · | · | 5,712 Direct | · | Acquired | (price as of 2026-10-06) |
| April 4, 2024 | SRZN | P | 5,712 | · | · | 5,712 Direct | · | Acquired | (price as of 2026-10-06) |
| Jan. 29, 2024 | SRZN | A | 33 | · | · | 33 Direct | · | Acquired | (price as of 2026-10-06) |
| Dec. 15, 2023 | SRZN | A | 2,046 | $5.67 | $11,601 | 2,046 Direct | · | Acquired | 365.1% (price as of 2026-10-06) |
| June 15, 2023 | SRZN | A | 25,000 | $0.38 | $9,500 | 34,578 Direct | +261.01% | Acquired | 362.6% (price as of 2026-10-06) |
| March 1, 2023 | SRZN | A | 405,000 | · | · | 405,000 Direct | · | Acquired | (price as of 2026-10-06) |
| Dec. 15, 2022 | SRZN | A | 9,578 | $0.41 | $3,927 | 9,578 Direct | · | Acquired | 328.8% (price as of 2026-10-06) |
| Oct. 10, 2022 | SRZN | D | 35,987 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Oct. 10, 2022 | SRZN | D | 2,065 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Oct. 10, 2022 | SRZN | D | 181,270 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Oct. 10, 2022 | SRZN | D | 315,310 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Oct. 10, 2022 | SRZN | A | 35,987 | · | · | 35,987 Direct | · | Acquired | (price as of 2026-10-06) |
| Oct. 10, 2022 | SRZN | A | 315,310 | · | · | 315,310 Direct | · | Acquired | (price as of 2026-10-06) |
| Oct. 10, 2022 | SRZN | A | 181,270 | · | · | 181,270 Direct | · | Acquired | (price as of 2026-10-06) |
| Oct. 10, 2022 | SRZN | A | 2,065 | · | · | 2,065 Direct | · | Acquired | (price as of 2026-10-06) |
| March 1, 2022 | SRZN | A | 370,000 | · | · | 370,000 Direct | · | Acquired | (price as of 2026-10-06) |
| Aug. 12, 2021 | SRZN | A | 183,335 | · | · | 183,335 Direct | · | Acquired | (price as of 2026-10-06) |
| April 30, 2018 | VTVT | A | 15,000 | $1.79 | $26,850 | 70,000 Direct | +27.27% | Acquired | -58.1% (price as of 2026-10-06) |
| May 1, 2017 | VTVT | A | 15,000 | $5.31 | $79,650 | 55,000 Direct | +37.50% | Acquired | -85.9% (price as of 2026-10-06) |
| May 12, 2016 | VTVT | A | 15,000 | · | · | 40,000 Direct | +60.00% | Acquired | (price as of 2026-10-06) |
| Aug. 4, 2015 | VTVT | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 10, 2014 | GERN | A | 400,000 | · | · | 400,000 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 12, 2013 | GERN | A | 400,000 | · | · | 400,000 Direct | · | Acquired | (price as of 2026-10-06) |
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 1, 2026 | SRZN | Restricted Stock Unit | Common Stock | · | · | 12,500 | Disposed |
| Feb. 17, 2026 | SRZN | Restricted Stock Unit | Common Stock | · | · | 242,200 | Acquired |
| Feb. 17, 2026 | SRZN | Employee Stock Option (right to buy) | Common Stock | $24.53 | Feb. 16, 2036 | 242,200 | Acquired |
| May 1, 2025 | SRZN | Option (right to buy) | Common Stock | $10.48 | May 1, 2035 | 75,000 | Acquired |
| May 1, 2025 | SRZN | Restricted Stock Unit | Common Stock | · | · | 25,000 | Acquired |
| March 24, 2025 | SRZN | Series A Common Stock Warrant (right to buy) | Common Stock | $16.96 | April 4, 2029 | 1,474 | Disposed |
| March 24, 2025 | SRZN | Series B Common Stock Warrant (right to buy) | Common Stock | $15.71 | · | 1,603 | Disposed |
| March 24, 2025 | SRZN | Series C Common Stock Warrant (right to buy) | Common Stock | $16.00 | · | 5,712 | Disposed |
| March 24, 2025 | SRZN | Series D Common Stock Warrant (right to buy) | Common Stock | $16.00 | · | 5,712 | Disposed |
| March 24, 2025 | SRZN | Series A Common Stock Warrant (right to buy) | Common Stock | $12.45 | April 4, 2029 | 1,474 | Acquired |
| March 24, 2025 | SRZN | Series B Common Stock Warrant (right to buy) | Common Stock | $12.45 | · | 1,603 | Acquired |
| Jan. 17, 2025 | SRZN | Option (right to buy) | Common Stock | $12.08 | Jan. 17, 2035 | 100,000 | Acquired |
| May 1, 2024 | SRZN | Option (right to buy) | Common Stock | $9.89 | May 1, 2034 | 43,000 | Acquired |
| April 24, 2024 | SRZN | Option (right to buy) | Common Stock | $8.97 | April 24, 2034 | 43,000 | Acquired |
| April 4, 2024 | SRZN | Series A Common Stock Warrant (right to buy) | Common Stock | $16.96 | April 4, 2029 | 1,474 | Acquired |
| April 4, 2024 | SRZN | Series B Common Stock Warrant (right to buy) | Common Stock | $15.71 | · | 1,603 | Acquired |
| April 4, 2024 | SRZN | Series C Common Stock Warrant (right to buy) | Common Stock | $16.00 | · | 5,712 | Acquired |
| April 4, 2024 | SRZN | Series D Common Stock Warrant (right to buy) | Common Stock | $16.00 | · | 5,712 | Acquired |
| Jan. 29, 2024 | SRZN | Option (right to buy) | Common Stock | $7.89 | Jan. 29, 2034 | 33 | Acquired |
| March 1, 2023 | SRZN | Option (right to buy) | Common Stock | $1.13 | March 1, 2033 | 405,000 | Acquired |
| Oct. 10, 2022 | SRZN | Option (right to buy) | Common Stock | $10.77 | Feb. 22, 2031 | 35,987 | Disposed |
| Oct. 10, 2022 | SRZN | Option (right to buy) | Common Stock | $10.25 | Aug. 12, 2031 | 2,065 | Disposed |
| Oct. 10, 2022 | SRZN | Option (right to buy) | Common Stock | $10.25 | Aug. 12, 2031 | 181,270 | Disposed |
| Oct. 10, 2022 | SRZN | Option (right to buy) | Common Stock | $10.77 | Feb. 22, 2031 | 315,310 | Disposed |
| Oct. 10, 2022 | SRZN | Option (right to buy) | Common Stock | $2.16 | Feb. 22, 2031 | 35,987 | Acquired |
| Oct. 10, 2022 | SRZN | Option (right to buy) | Common Stock | $2.16 | Feb. 22, 2031 | 315,310 | Acquired |
| Oct. 10, 2022 | SRZN | Option (right to buy) | Common Stock | $2.16 | Aug. 12, 2031 | 181,270 | Acquired |
| Oct. 10, 2022 | SRZN | Option (right to buy) | Common Stock | $2.16 | Aug. 12, 2031 | 2,065 | Acquired |
| March 1, 2022 | SRZN | Stock Option (right to buy) | Common Stock | $3.11 | March 1, 2032 | 370,000 | Acquired |
| Aug. 12, 2021 | SRZN | Stock Option (right to buy) | Common Stock | $10.25 | Aug. 11, 2031 | 183,335 | Acquired |
| April 30, 2018 | VTVT | Director stock option (right to buy) | Class A common stock | $1.79 | April 30, 2028 | 15,000 | Acquired |
| May 1, 2017 | VTVT | Director stock option (right to buy) | Class A common stock | $5.31 | May 1, 2027 | 15,000 | Acquired |
| May 12, 2016 | VTVT | Director stock option (right to buy) | Class A common stock | $5.35 | May 12, 2026 | 15,000 | Acquired |
| Aug. 4, 2015 | VTVT | Director stock option (right to buy) | Class A common stock | $15.00 | July 29, 2025 | 25,000 | Acquired |
| Feb. 10, 2014 | GERN | Employee Stock Option (right to buy) | Common Stock | $5.01 | Feb. 10, 2024 | 400,000 | Acquired |
| Feb. 12, 2013 | GERN | Employee Stock Option (right to buy) | Common Stock | $1.51 | Feb. 12, 2023 | 400,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 8 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Aug. 20, 2021 | SRZN | Employee Stock Option (right to buy) | · | Direct |
| Aug. 20, 2021 | SRZN | Employee Stock Option (right to buy) | · | Direct |
| Aug. 20, 2021 | SRZN | Employee Stock Option (right to buy) | · | Direct |
| Aug. 16, 2021 | SRZN | Employee Stock Option (right to buy) | · | Direct |
| Aug. 16, 2021 | SRZN | Employee Stock Option (right to buy) | · | Direct |
| Aug. 16, 2021 | SRZN | Employee Stock Option (right to buy) | · | Direct |
| July 30, 2015 | VTVT | No securities are beneficially owned | 0 | Direct |
| Dec. 6, 2012 | GERN | Stock Option (right to buy) | 120,000 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $630,000 | · | $262,000 | · | $346,500 | · | · | $2,819,017 |
| 2024 | $605,000 | · | · | · | $287,375 | · | · | $1,520,085 |
| 2023 | $580,320 | · | · | · | $245,000 | · | · | $1,165,250 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.