David R Pelizzon
CIK 1719217 · View on SEC EDGAR ↗
Insider
Activist
First SEC filing: Oct. 7, 2020 · Latest: June 12, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 13 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
13 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| March 13, 2023 | ATEC | P | 3,100 | $15.24 | $47,244 | 279,245 Direct | +1.12% | Acquired | -36.9% (price as of 2026-08-20) |
| Aug. 11, 2022 | KIDS | P | 1,525,000 | $55.00 | $83,875,000 | 1,525,000 Indirect | — | Acquired | -52.3% (price as of 2026-08-20) |
| Nov. 11, 2021 | ATEC | P | 4,366 | $11.41 | $49,816 | 288,849 Direct | +1.53% | Acquired | -15.8% (price as of 2026-08-20) |
| Nov. 8, 2021 | ATEC | P | 5,425 | $13.00 | $70,525 | 284,483 Direct | +1.94% | Acquired | -26.1% (price as of 2026-08-20) |
| May 10, 2021 | ATEC | P | 120,000 | $15.25 | $1,830,000 | 268,837 Direct | +80.63% | Acquired | -37.0% (price as of 2026-08-20) |
| March 8, 2021 | ATEC | P | 695 | $15.93 | $11,071 | 148,837 Direct | +0.47% | Acquired | -39.7% (price as of 2026-08-20) |
| March 8, 2021 | ATEC | P | 4,003 | $15.50 | $62,046 | 148,142 Direct | +2.78% | Acquired | -38.0% (price as of 2026-08-20) |
| March 1, 2021 | ATEC | P | 8,100,810 | $11.11 | $89,999,999 | 11,395,045 Indirect | +245.91% | Acquired | -13.5% (price as of 2026-08-20) |
| Oct. 16, 2017 | KIDS | P | 10,000 | $13.00 | $130,000 | 10,000 Direct | — | Acquired | 101.8% (price as of 2026-08-20) |
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 |
|---|---|---|---|---|---|---|---|
| Sept. 20, 2022 | KIDS | Warrants (right to buy) | Common Stock (1,525,000) | $0.00 | — | 1,525,000 | Acquired |
| Aug. 11, 2022 | KIDS | Warrants (right to buy) | Common Stock (1,525,000) | $0.00 | — | 1,525,000 | Acquired |
| Oct. 16, 2017 | KIDS | Series B Convertible Preferred Stock | Common Stock (2,785,833) | — | — | 4,157,960 | Disposed |
| Oct. 16, 2017 | KIDS | Series A Convertible Preferred Stock | Common Stock (670,000) | — | — | 1,000,000 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 10 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Oct. 7, 2020 | ATEC | Common Stock | — | Direct |
| June 19, 2020 | ATEC | Common Stock | 115,997 | Direct |
| June 19, 2020 | ATEC | Common Stock | 1,086,957 | Indirect |
| June 19, 2020 | ATEC | Warrants (right to buy)→ Common Stock (456,000) | 456,000 | Indirect |
| June 19, 2020 | ATEC | Warrants (right to buy)→ Common Stock (2,419,355) | 2,419,355 | Indirect |
| June 19, 2020 | ATEC | Warrants (right to buy)→ Common Stock (537,910) | 537,910 | Indirect |
| Oct. 11, 2017 | KIDS | Common Stock | 1,206 | Indirect |
| Oct. 11, 2017 | KIDS | Stock Option (Right to Buy)→ Common Stock (1,340) | 1,340 | Indirect |
| Oct. 11, 2017 | KIDS | Series A Convertible Preferred Stock→ Common Stock (670,000) | 670,000 | Indirect |
| Oct. 11, 2017 | KIDS | Series B Convertible Preferred Stock→ Common Stock (2,785,833) | 2,785,833 | Indirect |