ATEC insider transactions

Director Valentine Keith bought $996,192 worth of shares (135,000 units at $7.38), increasing direct ownership by 139% to 232,271 units (SEC Form 4)

SEC Form 4 filed by Marshall Tyson Eliot

CHIEF FINANCIAL OFFICER Koning John Todd sold $986,192 worth of shares (79,789 units at $12.36), decreasing direct ownership by 12% to 600,721 units (SEC Form 4)

CHIEF OPERATING OFFICER Lish Scott sold $3,204,580 worth of shares (260,535 units at $12.30), decreasing direct ownership by 24% to 815,704 units (SEC Form 4)

EVP, SALES Sponsel David sold $2,046,419 worth of shares (163,452 units at $12.52), decreasing direct ownership by 24% to 504,932 units (SEC Form 4)

EVP, PEOPLE & CULTURE Hunsaker Craig E sold $1,441,041 worth of shares (116,367 units at $12.38) and gifted 600 shares, decreasing direct ownership by 6% to 1,725,609 units (SEC Form 4)

CEO Miles Patrick covered exercise/tax liability with 219,749 shares, decreasing direct ownership by 4% to 5,778,551 units (SEC Form 4)

CHIEF FINANCIAL OFFICER Koning John Todd covered exercise/tax liability with 68,910 shares, decreasing direct ownership by 9% to 680,510 units (SEC Form 4)

GENERAL COUNSEL & CORP. SEC. Marshall Tyson Eliot sold $1,109,549 worth of shares (88,835 units at $12.49), decreasing direct ownership by 14% to 559,459 units (SEC Form 4)

EVP, SALES Sponsel David was granted 318,884 shares, increasing direct ownership by 91% to 668,384 units (SEC Form 4)

GENERAL COUNSEL & CORP. SEC. Marshall Tyson Eliot was granted 302,852 shares, increasing direct ownership by 88% to 648,294 units (SEC Form 4)

CHIEF FINANCIAL OFFICER Koning John Todd was granted 335,868 shares, increasing direct ownership by 81% to 749,420 units (SEC Form 4)

EVP, PEOPLE & CULTURE Hunsaker Craig E was granted 459,480 shares, increasing direct ownership by 33% to 1,842,576 units (SEC Form 4)

CEO Miles Patrick was granted 966,293 shares, increasing direct ownership by 19% to 5,998,300 units (SEC Form 4)

CHIEF OPERATING OFFICER Lish Scott was granted 459,480 shares, increasing direct ownership by 74% to 1,076,239 units (SEC Form 4)

EVP, PEOPLE & CULTURE Hunsaker Craig E exercised 251,176 shares at a strike of $2.14 and covered exercise/tax liability with 41,105 shares, increasing direct ownership by 18% to 1,383,096 units (SEC Form 4)

EVP, SALES Sponsel David sold $833,261 worth of shares (60,425 units at $13.79), decreasing direct ownership by 15% to 349,500 units (SEC Form 4)

EVP, PEOPLE & CULTURE Hunsaker Craig E sold $549,536 worth of shares (37,358 units at $14.71), decreasing direct ownership by 3% to 1,173,025 units (SEC Form 4)

CEO Miles Patrick sold $2,101,000 worth of shares (100,000 units at $21.01), decreasing direct ownership by 2% to 5,135,398 units (SEC Form 4)

CHIEF OPERATING OFFICER Lish Scott sold $390,836 worth of shares (19,900 units at $19.64), decreasing direct ownership by 3% to 641,432 units (SEC Form 4)

Director Pelizzon David R sold $4,915,000 worth of shares (250,000 units at $19.66) (SEC Form 4)

EVP, PEOPLE & CULTURE Hunsaker Craig E sold $679,051 worth of shares (32,584 units at $20.84), decreasing direct ownership by 3% to 1,256,558 units (SEC Form 4)

EVP, SALES Sponsel David sold $438,794 worth of shares (21,106 units at $20.79), decreasing direct ownership by 5% to 439,767 units (SEC Form 4)

Director Demski David M sold $636,000 worth of shares (30,000 units at $21.20), decreasing direct ownership by 7% to 399,623 units (SEC Form 4)

Director Pelizzon David R sold $5,295,098 worth of shares (250,000 units at $21.18) (SEC Form 4)

Large owner Squadron Capital Llc sold $5,295,098 worth of shares (250,000 units at $21.18), decreasing direct ownership by 2% to 10,645,045 units (SEC Form 4)

CEO Miles Patrick covered exercise/tax liability with 28,680 shares, decreasing direct ownership by 0.54% to 5,235,398 units (SEC Form 4)

CHIEF FINANCIAL OFFICER Koning John Todd covered exercise/tax liability with 15,266 shares, decreasing direct ownership by 3% to 445,955 units (SEC Form 4)

EVP, SALES Sponsel David sold $21,193 worth of shares (988 units at $21.45), decreasing direct ownership by 0.21% to 460,873 units (SEC Form 4)

Large owner Squadron Capital Holdings Llc sold $5,295,098 worth of shares (250,000 units at $21.18) (SEC Form 4)

Large owner Pritzker Jennifer N. sold $5,295,098 worth of shares (250,000 units at $21.18) (SEC Form 4)

CHIEF OPERATING OFFICER Lish Scott sold $233,486 worth of shares (10,875 units at $21.47), decreasing direct ownership by 2% to 661,332 units (SEC Form 4)

GENERAL COUNSEL & CORP. SEC. Marshall Tyson Eliot sold $491,526 worth of shares (22,889 units at $21.47), decreasing direct ownership by 6% to 345,442 units (SEC Form 4)

CEO Miles Patrick sold $2,211,000 worth of shares (100,000 units at $22.11), decreasing direct ownership by 2% to 5,264,078 units (SEC Form 4)

Large owner Pritzker Jennifer N. sold $5,155,000 worth of shares (250,000 units at $20.62) (SEC Form 4)

Large owner Squadron Capital Holdings Llc sold $5,155,000 worth of shares (250,000 units at $20.62) (SEC Form 4)

Director Pelizzon David R sold $5,155,000 worth of shares (250,000 units at $20.62) (SEC Form 4)

Large owner Squadron Capital Llc sold $5,155,000 worth of shares (250,000 units at $20.62), decreasing direct ownership by 2% to 10,895,045 units (SEC Form 4)

GENERAL COUNSEL & CORP. SEC. Marshall Tyson Eliot sold $1,365,700 worth of shares (70,000 units at $19.51), decreasing direct ownership by 16% to 368,331 units (SEC Form 4)

CHIEF OPERATING OFFICER Lish Scott exercised 25,000 shares at a strike of $3.63 and sold $495,000 worth of shares (25,000 units at $19.80) (SEC Form 4)

Large owner Squadron Capital Holdings Llc sold $5,200,000 worth of shares (250,000 units at $20.80) (SEC Form 4)

Large owner Pritzker Jennifer N. sold $5,200,000 worth of shares (250,000 units at $20.80) (SEC Form 4)

Director Pelizzon David R sold $5,200,000 worth of shares (250,000 units at $20.80) (SEC Form 4)

Large owner Squadron Capital Llc sold $5,200,000 worth of shares (250,000 units at $20.80), decreasing direct ownership by 2% to 11,145,045 units (SEC Form 4)

Director Rydin Jeffrey P sold $3,864,000 worth of shares (200,000 units at $19.32), decreasing direct ownership by 34% to 385,441 units (SEC Form 4)

CEO Miles Patrick sold $1,896,000 worth of shares (100,000 units at $18.96), decreasing direct ownership by 2% to 5,364,078 units (SEC Form 4)

EVP, PEOPLE & CULTURE Hunsaker Craig E sold $1,995,000 worth of shares (100,000 units at $19.95), decreasing direct ownership by 7% to 1,289,142 units (SEC Form 4)

EVP, SALES Sponsel David sold $1,132,600 worth of shares (70,000 units at $16.18), decreasing direct ownership by 13% to 461,861 units (SEC Form 4)

CHIEF OPERATING OFFICER Lish Scott exercised 13,500 shares at a strike of $3.35, increasing direct ownership by 2% to 672,207 units (SEC Form 4)

CEO Miles Patrick sold $1,396,000 worth of shares (100,000 units at $13.96), decreasing direct ownership by 2% to 5,464,078 units (SEC Form 4)

EVP, SALES Sponsel David sold $2,113,239 worth of shares (140,000 units at $15.09), decreasing direct ownership by 21% to 531,861 units (SEC Form 4)

Director Berkowitz Mortimer Iii sold $998,125 worth of shares (62,500 units at $15.97), decreasing direct ownership by 9% to 618,050 units (SEC Form 4)

CEO Miles Patrick sold $4,719,000 worth of shares (300,000 units at $15.73), decreasing direct ownership by 5% to 5,564,078 units (SEC Form 4)

CHIEF OPERATING OFFICER Lish Scott sold $101,231 worth of shares (6,323 units at $16.01), decreasing direct ownership by 0.95% to 658,707 units (SEC Form 4)

CHIEF OPERATING OFFICER Lish Scott sold $148,832 worth of shares (9,302 units at $16.00), decreasing direct ownership by 1% to 665,030 units (SEC Form 4)

CEO Miles Patrick gifted 10,000 shares, decreasing direct ownership by 0.17% to 5,864,078 units (SEC Form 4)

EVP, SALES Sponsel David covered exercise/tax liability with 982 shares, decreasing direct ownership by 0.15% to 671,861 units (SEC Form 4)

CHIEF FINANCIAL OFFICER Koning John Todd covered exercise/tax liability with 5,315 shares, decreasing direct ownership by 1% to 461,221 units (SEC Form 4)

EVP, PEOPLE & CULTURE Hunsaker Craig E sold $916,729 worth of shares (60,876 units at $15.06), decreasing direct ownership by 4% to 1,389,142 units (SEC Form 4)

CHIEF OPERATING OFFICER Lish Scott sold $952,083 worth of shares (70,604 units at $13.48), decreasing direct ownership by 9% to 674,332 units (SEC Form 4)