Insider at

04

Insider transactions

05
0 buys (P) 4 sells (S) Net: $-4,323,902 + 30 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

30 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
March 13, 2026 ATEC S 260,535 $12.30 $3,204,580 815,704 Direct -24.21% Disposed -18.5% (price as of 2026-10-02)
Dec. 16, 2025 ATEC S 10b5-1 19,900 $19.64 $390,836 641,432 Direct -3.01% Disposed -48.9% (price as of 2026-10-02)
Dec. 5, 2025 ATEC S 10,875 $21.47 $233,486 661,332 Direct -1.62% Disposed -53.3% (price as of 2026-10-02)
Nov. 20, 2025 ATEC S 25,000 $19.80 $495,000 672,207 Direct -3.59% Disposed -49.3% (price as of 2026-10-02)
Aug. 21, 2025 ATEC S 10b5-1 6,323 $16.01 $101,231 658,707 Direct -0.95% Disposed -37.4% (price as of 2026-10-02)
Aug. 13, 2025 ATEC S 10b5-1 9,302 $16.00 $148,832 665,030 Direct -1.38% Disposed -37.3% (price as of 2026-10-02)
Aug. 5, 2025 ATEC S 10b5-1 16,666 $15.00 $249,990 674,332 Direct -2.41% Disposed -33.1% (price as of 2026-10-02)
Aug. 4, 2025 ATEC S 10b5-1 17,857 $14.00 $249,998 690,998 Direct -2.52% Disposed -28.4% (price as of 2026-10-02)
Aug. 1, 2025 ATEC S 10b5-1 36,081 $12.53 $452,095 708,855 Direct -4.84% Disposed -20.0% (price as of 2026-10-02)
July 10, 2025 ATEC S 10b5-1 3,982 $12.00 $47,784 744,936 Direct -0.53% Disposed -16.4% (price as of 2026-10-02)
June 13, 2025 ATEC S 10b5-1 22,727 $11.07 $251,588 748,918 Direct -2.95% Disposed -9.4% (price as of 2026-10-02)
May 19, 2025 ATEC S 55,375 $13.00 $719,875 771,645 Direct -6.70% Disposed -22.8% (price as of 2026-10-02)
May 5, 2025 ATEC S 12,000 $12.12 $145,440 826,251 Direct -1.43% Disposed -17.2% (price as of 2026-10-02)
March 10, 2025 ATEC S 10b5-1 27,994 $9.72 $272,102 816,500 Direct -3.31% Disposed 3.2% (price as of 2026-10-02)
Feb. 27, 2025 ATEC S 10b5-1 23,183 $12.03 $278,891 844,494 Direct -2.67% Disposed -16.6% (price as of 2026-10-02)
Feb. 6, 2025 ATEC S 10b5-1 27,453 $11.49 $315,435 867,677 Direct -3.07% Disposed -12.7% (price as of 2026-10-02)
Feb. 27, 2024 ATEC S 10b5-1 31,075 $15.19 $472,029 507,165 Direct -5.77% Disposed -34.0% (price as of 2026-10-02)
Feb. 21, 2024 ATEC S 10b5-1 11,963 $15.34 $183,512 538,240 Direct -2.17% Disposed -34.6% (price as of 2026-10-02)
Feb. 2, 2024 ATEC S 10b5-1 25,210 $16.47 $415,209 518,457 Direct -4.64% Disposed -39.1% (price as of 2026-10-02)
Feb. 27, 2023 ATEC S 10b5-1 25,372 $14.76 $374,491 430,522 Direct -5.57% Disposed -32.0% (price as of 2026-10-02)
Feb. 23, 2023 ATEC S 10b5-1 12,500 $14.37 $179,625 453,034 Direct -2.69% Disposed -30.2% (price as of 2026-10-02)
Feb. 21, 2023 ATEC S 10b5-1 9,570 $14.02 $134,171 465,534 Direct -2.01% Disposed -28.5% (price as of 2026-10-02)
March 1, 2022 ATEC S 10b5-1 5,100 $10.94 $55,794 323,342 Direct -1.55% Disposed -8.3% (price as of 2026-10-02)
Feb. 25, 2022 ATEC S 10b5-1 8,000 $10.26 $82,080 328,442 Direct -2.38% Disposed -2.2% (price as of 2026-10-02)
Feb. 24, 2022 ATEC S 10b5-1 12,500 $9.44 $118,000 336,442 Direct -3.58% Disposed 6.2% (price as of 2026-10-02)
Feb. 22, 2022 ATEC S 10b5-1 4,760 $9.66 $45,982 260,350 Direct -1.80% Disposed 3.8% (price as of 2026-10-02)
Nov. 10, 2021 ATEC S 10b5-1 6,250 $11.79 $73,688 265,110 Direct -2.30% Disposed -14.9% (price as of 2026-10-02)
Aug. 3, 2021 ATEC S 10b5-1 10,000 $14.24 $142,400 288,402 Direct -3.35% Disposed -29.6% (price as of 2026-10-02)
July 12, 2021 ATEC S 10b5-1 11,965 $16.46 $196,944 298,402 Direct -3.86% Disposed -39.1% (price as of 2026-10-02)

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.

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DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Feb. 25, 2026 ATEC Restricted Stock Units [F6] Common Stock (63,689) · · 63,689 Acquired
Feb. 25, 2026 ATEC Restricted Stock Units [F7] Common Stock (63,689) · · 63,689 Acquired
Nov. 20, 2025 ATEC Employee Stock Option (right to buy) Common Stock (25,000) $3.63 Nov. 7, 2027 25,000 Disposed
Oct. 14, 2025 ATEC Employee Stock Option (right to buy) Common Stock (13,500) $3.35 March 22, 2028 13,500 Disposed
Aug. 6, 2024 ATEC Employee Stock Option (right to buy) Common Stock (11,500) $3.35 March 22, 2028 11,500 Disposed
Aug. 6, 2024 ATEC Employee Stock Option (right to buy) Common Stock (60,000) $2.69 July 30, 2028 60,000 Disposed
March 1, 2023 ATEC Warrants (right to buy) Common Stock (13,493) $3.50 May 17, 2023 13,493 Disposed

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 6 holdings

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Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
Nov. 15, 2021 ATEC Common Stock · Direct
Nov. 9, 2020 ATEC Common Stock 293,674 Direct
Nov. 9, 2020 ATEC Employee Stock Option (right to buy)→ Common Stock (25,000) 25,000 Direct
Nov. 9, 2020 ATEC Employee Stock Option (right to buy)→ Common Stock (25,000) 25,000 Direct
Nov. 9, 2020 ATEC Employee Stock Option (right to buy)→ Common Stock (60,000) 60,000 Direct
Nov. 9, 2020 ATEC Warrants (right to buy)→ Common Stock (13,493) 13,493 Direct

Compensation (DEF 14A)

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Matched by name from proxy statements (DEF 14A) — verify against the filing.

Fiscal yearSalaryBonusStock awards Option awardsNon-equity incentivePension changeOtherTotal
2025 $485,009 · · · $257,500 · $34,582 $5,271,245
2024 $424,135 · · · $165,000 · $34,992 $2,575,871
2023 $380,000 · · · $310,000 · $33,205 $2,585,149

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.