David Sponsel
CIK 1772837 · View on SEC EDGAR ↗
First SEC filing: April 8, 2019 · Latest: April 8, 2019
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 |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 12, 2021 | ATEC | S | 9,847 | $11.56 | $113,831 | 541,765 Direct | -1.79% | Disposed | -14.7% (price as of 2026-08-19) |
| June 16, 2021 | ATEC | S | 10,000 | $14.78 | $147,800 | 554,317 Direct | -1.77% | Disposed | -33.3% (price as of 2026-08-19) |
| May 3, 2021 | ATEC | S 10b5-1 | 30,000 | $15.97 | $479,100 | 598,184 Direct | -4.78% | Disposed | -38.3% (price as of 2026-08-19) |
| April 26, 2021 | ATEC | S 10b5-1 | 14,572 | $16.63 | $242,332 | 598,184 Direct | -2.38% | Disposed | -40.7% (price as of 2026-08-19) |
| Oct. 12, 2020 | ATEC | S 10b5-1 | 89,999 | $9.47 | $852,291 | 571,840 Direct | -13.60% | Disposed | 4.1% (price as of 2026-08-19) |
| March 11, 2020 | ATEC | P | 11,000 | $4.51 | $49,610 | 443,019 Direct | +2.55% | Acquired | 118.6% (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 |
|---|---|---|---|---|---|---|---|
| May 3, 2021 | ATEC | Employee Stock Option (right to buy) | Common Stock (12,813) | $3.17 | Nov. 2, 2028 | 12,813 | Disposed |
| May 3, 2021 | ATEC | Employee Stock Option (right to buy) | Common Stock (17,187) | $3.86 | May 29, 2028 | 17,187 | Disposed |
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 |
|---|---|---|---|---|---|---|---|---|
| 2025 | $445,390 | — | — | — | $450,000 | — | $34,355 | $3,954,407 |
| 2024 | $435,385 | — | — | — | $175,000 | — | $36,955 | $2,803,029 |
| 2023 | $400,000 | — | — | — | $525,000 | — | $35,845 | $3,214,860 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.