Austin Aerts
CIK 1979974 · View on SEC EDGAR ↗
Insider
First SEC filing: June 7, 2023 · 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
0 buys (P)
9 sells (S)
Net:
$-68,639
+ 4 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
4 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 11, 2026 | SERA | S | 2,037 | $2.01 | $4,094 | 301,190 Direct | -0.67% | Disposed | 1.5% (price as of 2026-08-19) |
| June 9, 2026 | SERA | S | 5,440 | $2.08 | $11,315 | 303,227 | — | — | -1.9% (price as of 2026-08-19) |
| March 11, 2026 | SERA | S | 1,019 | $2.04 | $2,079 | 264,452 Direct | -0.38% | Disposed | 0.0% (price as of 2026-08-19) |
| March 10, 2026 | SERA | S | 6,069 | $1.90 | $11,531 | 265,471 Direct | -2.24% | Disposed | 7.4% (price as of 2026-08-19) |
| March 9, 2026 | SERA | S | 674 | $1.96 | $1,321 | 271,540 Direct | -0.25% | Disposed | 4.1% (price as of 2026-08-19) |
| Dec. 10, 2025 | SERA | S | 873 | $3.31 | $2,890 | 272,214 Direct | -0.32% | Disposed | -38.4% (price as of 2026-08-19) |
| Dec. 9, 2025 | SERA | S | 5,232 | $3.04 | $15,905 | 273,087 Direct | -1.88% | Disposed | -32.9% (price as of 2026-08-19) |
| Nov. 10, 2025 | SERA | S | 6,351 | $2.62 | $16,640 | 278,319 Direct | -2.23% | Disposed | -22.1% (price as of 2026-08-19) |
| Sept. 11, 2025 | SERA | S | 915 | $3.13 | $2,864 | 284,670 Direct | -0.32% | Disposed | -34.8% (price as of 2026-08-19) |
| June 10, 2025 | SERA | S | 945 | $1.48 | $1,399 | 296,648 Direct | -0.32% | Disposed | 37.8% (price as of 2026-08-19) |
| June 9, 2025 | SERA | S | 5,735 | $1.43 | $8,201 | 297,593 Direct | -1.89% | Disposed | 42.7% (price as of 2026-08-19) |
| May 8, 2025 | SERA | S | 6,374 | $2.44 | $15,553 | 303,328 Direct | -2.06% | Disposed | -16.4% (price as of 2026-08-19) |
| March 7, 2025 | SERA | S | 4,818 | $4.12 | $19,850 | 309,702 Direct | -1.53% | Disposed | -50.5% (price as of 2026-08-19) |
| March 6, 2025 | SERA | S | 540 | $4.16 | $2,246 | 314,520 Direct | -0.17% | Disposed | -51.0% (price as of 2026-08-19) |
| Feb. 12, 2025 | SERA | S | 5,915 | $4.58 | $27,091 | 277,410 Direct | -2.09% | Disposed | -55.5% (price as of 2026-08-19) |
| Jan. 10, 2025 | SERA | S 10b5-1 | 2,431 | $8.06 | $19,594 | 283,325 Direct | -0.85% | Disposed | -74.7% (price as of 2026-08-19) |
| Dec. 10, 2024 | SERA | S | 5,730 | $7.41 | $42,459 | 285,756 Direct | -1.97% | Disposed | -72.5% (price as of 2026-08-19) |
| Nov. 11, 2024 | SERA | S | 7,179 | $7.32 | $52,550 | 291,486 Direct | -2.40% | 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 (53,810) | $4.20 | March 5, 2035 | 53,810 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 9 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| June 7, 2023 | SERA | Class A Common Stock | 5,810 | Direct |
| June 7, 2023 | SERA | Stock Option (right to buy)→ Class A Common Stock (4,810) | 4,810 | Direct |
| June 7, 2023 | SERA | Stock Option (right to buy)→ Class A Common Stock (4,810) | 4,810 | Direct |
| June 7, 2023 | SERA | Stock Option (right to buy)→ Class A Common Stock (24,338) | 24,338 | Direct |
| June 7, 2023 | SERA | Stock Option (right to buy)→ Class A Common Stock (2,405) | 2,405 | Direct |
| June 7, 2023 | SERA | Stock Option (right to buy)→ Class A Common Stock (86,580) | 86,580 | Direct |
| June 7, 2023 | SERA | Stock Option (right to buy)→ Class A Common Stock (5,000) | 5,000 | Direct |
| June 7, 2023 | SERA | Stock Option (right to buy)→ Class A Common Stock (40,000) | 40,000 | Direct |
| June 7, 2023 | SERA | Stock Option (right to buy)→ Class A Common Stock (9,190) | 9,190 | 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 |
|---|---|---|---|---|---|---|---|---|
| 2023 | $307,627 | — | $645,178 | $23,195 | $46,798 | — | $13,200 | $1,035,998 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.