Benjamin Jackson
CIK 1779964 · View on SEC EDGAR ↗
First SEC filing: July 14, 2021 · Latest: June 15, 2026
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
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 11, 2026 | SERA | S | 2,179 | $2.01 | $4,380 | 161,756 Direct | -1.33% | Disposed | 1.5% (price as of 2026-08-19) |
| March 11, 2026 | SERA | S | 1,027 | $2.04 | $2,095 | 114,720 Direct | -0.89% | Disposed | 0.0% (price as of 2026-08-19) |
| March 9, 2026 | SERA | S | 3,119 | $1.96 | $6,113 | 115,747 Direct | -2.62% | Disposed | 4.1% (price as of 2026-08-19) |
| Dec. 10, 2025 | SERA | S | 892 | $3.31 | $2,953 | 118,866 Direct | -0.74% | Disposed | -38.4% (price as of 2026-08-19) |
| Nov. 10, 2025 | SERA | S | 7,059 | $2.62 | $18,495 | 119,758 Direct | -5.57% | Disposed | -22.1% (price as of 2026-08-19) |
| Sept. 11, 2025 | SERA | S | 934 | $3.13 | $2,923 | 126,817 Direct | -0.73% | Disposed | -34.8% (price as of 2026-08-19) |
| June 10, 2025 | SERA | S | 965 | $1.48 | $1,428 | 134,198 Direct | -0.71% | Disposed | 37.8% (price as of 2026-08-19) |
| May 8, 2025 | SERA | S | 7,084 | $2.44 | $17,285 | 131,460 Direct | -5.11% | Disposed | -16.4% (price as of 2026-08-19) |
| March 6, 2025 | SERA | S | 2,285 | $4.16 | $9,506 | 138,544 Direct | -1.62% | Disposed | -51.0% (price as of 2026-08-19) |
| Feb. 13, 2025 | SERA | S | 5,915 | $4.58 | $27,091 | 106,239 Direct | -5.27% | Disposed | -55.5% (price as of 2026-08-19) |
| Jan. 14, 2025 | SERA | S 10b5-1 | 8,407 | $6.20 | $52,123 | 112,154 Direct | -6.97% | Disposed | -67.1% (price as of 2026-08-19) |
| Jan. 13, 2025 | SERA | S 10b5-1 | 7,912 | $6.38 | $50,479 | 120,561 Direct | -6.16% | Disposed | -68.0% (price as of 2026-08-19) |
| Jan. 10, 2025 | SERA | S 10b5-1 | 1,231 | $8.05 | $9,910 | 128,473 Direct | -0.95% | Disposed | -74.7% (price as of 2026-08-19) |
| Jan. 10, 2025 | SERA | S 10b5-1 | 12,041 | $7.36 | $88,622 | 129,704 Direct | -8.49% | Disposed | -72.3% (price as of 2026-08-19) |
| Nov. 11, 2024 | SERA | S | 4,727 | $7.32 | $34,602 | 135,528 Direct | -3.37% | Disposed | -72.1% (price as of 2026-08-19) |
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 |
|---|---|---|---|---|---|---|---|
| March 12, 2026 | SERA | Stock Option (right to buy) | Class A Common Stock (68,550) | $1.99 | March 12, 2036 | 68,550 | Acquired |
| March 5, 2025 | SERA | Stock Option (right to buy) | Class A Common Stock (49,420) | $4.20 | March 5, 2035 | 49,420 | 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.
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 |
|---|---|---|---|---|---|---|---|---|
| 2021 | $223,260 | — | — | $1,294,287 | $100,424 | — | — | $1,617,971 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.