John J. Boniface
CIK 1870674 · View on SEC EDGAR ↗
First SEC filing: July 14, 2021 · Latest: July 14, 2021
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 |
|---|---|---|---|---|---|---|---|---|---|
| March 11, 2026 | SERA | S | 1,517 | $2.04 | $3,095 | 145,842 Direct | -1.03% | Disposed | 2.9% (price as of 2026-08-21) |
| March 9, 2026 | SERA | S | 3,038 | $1.96 | $5,954 | 147,359 Direct | -2.02% | Disposed | 7.1% (price as of 2026-08-21) |
| Dec. 10, 2025 | SERA | S | 1,332 | $3.31 | $4,409 | 150,397 Direct | -0.88% | Disposed | -36.6% (price as of 2026-08-21) |
| Nov. 10, 2025 | SERA | S | 7,767 | $2.62 | $20,350 | 151,726 Direct | -4.87% | Disposed | -19.8% (price as of 2026-08-21) |
| Sept. 11, 2025 | SERA | S | 1,395 | $3.13 | $4,366 | 159,493 Direct | -0.87% | Disposed | -32.9% (price as of 2026-08-21) |
| June 10, 2025 | SERA | S | 1,439 | $1.48 | $2,130 | 167,982 Direct | -0.85% | Disposed | 41.9% (price as of 2026-08-21) |
| May 8, 2025 | SERA | S | 5,132 | $2.44 | $12,522 | 165,718 Direct | -3.00% | Disposed | -13.9% (price as of 2026-08-21) |
| March 6, 2025 | SERA | S | 2,044 | $4.16 | $8,503 | 170,850 Direct | -1.18% | Disposed | -49.5% (price as of 2026-08-21) |
| Feb. 12, 2025 | SERA | S | 5,915 | $4.58 | $27,091 | 125,884 Direct | -4.49% | Disposed | -54.1% (price as of 2026-08-21) |
| Nov. 11, 2024 | SERA | S | 4,727 | $7.32 | $34,602 | 125,120 Direct | -3.64% | Disposed | -71.3% (price as of 2026-08-21) |
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 5, 2025 | SERA | Stock Option (right to buy) | Class A Common Stock (67,810) | $4.20 | March 5, 2035 | 67,810 | 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 |
|---|---|---|---|---|
| July 14, 2021 | SERA | Stock Option (right to buy)→ Class A Common Stock (75,998) | 75,998 | Direct |
| July 14, 2021 | SERA | Stock Option (right to buy)→ Class A Common Stock (5,844) | 5,844 | Direct |
| July 14, 2021 | SERA | Stock Option (right to buy)→ Class A Common Stock (25,012) | 25,012 | Direct |
| July 14, 2021 | SERA | Stock Option (right to buy)→ Class A Common Stock (73,383) | 73,383 | Direct |
| July 14, 2021 | SERA | Stock Option (right to buy)→ Class A Common Stock (112,945) | 112,945 | Direct |
| July 14, 2021 | SERA | Stock Option (right to buy)→ Class A Common Stock (22,042) | 22,042 | Direct |
| July 14, 2021 | SERA | Stock Option (right to buy)→ Class A Common Stock (154,064) | 154,064 | Direct |
| July 14, 2021 | SERA | Stock Option (right to buy)→ Class A Common Stock (77,836) | 77,836 | 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 | $439,130 | — | $197,442 | $186,970 | $166,650 | — | $14,000 | $1,004,192 |
| 2024 | $358,904 | — | — | — | $58,578 | — | $13,800 | $431,282 |
| 2023 | $398,490 | — | $316,480 | $88,160 | $55,633 | — | $13,200 | $871,963 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.