Insider at

04

Insider transactions

05
0 buys (P) 10 sells (S) Net: $-21,213,951 + 70 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

70 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Feb. 17, 2026 ATI S 10b5-1 28,724 $146.07 $4,195,715 280,061 Direct +11.43% Acquired 31.7% (price as of 2026-10-02)
Feb. 17, 2026 ATI S 10b5-1 8,403 $145.17 $1,219,864 308,785 Direct -2.65% Disposed 32.5% (price as of 2026-10-02)
Feb. 17, 2026 ATI S 10b5-1 12,435 $144.01 $1,790,764 317,188 Direct -3.77% Disposed 33.6% (price as of 2026-10-02)
Feb. 10, 2026 ATI S 10b5-1 10,438 $146.67 $1,530,941 269,623 Direct -3.73% Disposed 31.2% (price as of 2026-10-02)
Dec. 18, 2025 ATI S 10b5-1 6,158 $110.34 $679,474 126,518 Direct +5.12% Acquired 74.4% (price as of 2026-10-02)
Dec. 18, 2025 ATI S 10b5-1 47,355 $109.57 $5,188,687 132,676 Direct -26.30% Disposed 75.6% (price as of 2026-10-02)
Dec. 18, 2025 ATI S 10b5-1 6,507 $108.86 $708,352 180,031 Direct -3.49% Disposed 76.8% (price as of 2026-10-02)
Nov. 18, 2025 ATI S 10b5-1 26,998 $98.80 $2,667,402 246,538 Direct -9.87% Disposed 94.8% (price as of 2026-10-02)
Nov. 18, 2025 ATI S 10b5-1 24,711 $98.21 $2,426,867 273,536 Direct -8.29% Disposed 95.9% (price as of 2026-10-02)
Nov. 18, 2025 ATI S 10b5-1 8,291 $97.20 $805,885 298,247 Direct -2.70% Disposed 98.0% (price as of 2026-10-02)
Aug. 5, 2025 ATI S 10b5-1 2,003 $76.10 $152,428 306,538 Direct -0.65% Disposed 152.9% (price as of 2026-10-02)
Aug. 5, 2025 ATI S 10b5-1 7,220 $75.30 $543,666 308,541 Direct -2.29% Disposed 155.5% (price as of 2026-10-02)
Aug. 5, 2025 ATI S 10b5-1 40,777 $74.48 $3,037,071 315,761 Direct -11.44% Disposed 158.4% (price as of 2026-10-02)
June 12, 2025 ATI S 10b5-1 11,364 $84.30 $957,985 356,538 Direct -3.09% Disposed 128.3% (price as of 2026-10-02)
June 12, 2025 ATI S 10b5-1 25,531 $84.30 $2,152,263 367,902 Direct -6.49% Disposed 128.3% (price as of 2026-10-02)
June 12, 2025 ATI S 10b5-1 13,105 $82.89 $1,086,273 393,433 Direct -3.22% Disposed 132.1% (price as of 2026-10-02)
June 3, 2025 ATI S 10b5-1 50,000 $81.64 $4,082,000 406,538 Direct -10.95% Disposed 135.7% (price as of 2026-10-02)
May 20, 2025 ATI S 10b5-1 45,359 $75.31 $3,415,986 461,179 Direct -8.95% Disposed 155.5% (price as of 2026-10-02)
May 6, 2025 ATI S 10b5-1 4,641 $76.01 $352,762 456,536 Direct -1.01% Disposed 153.2% (price as of 2026-10-02)
May 6, 2025 ATI S 10b5-1 26,416 $68.56 $1,811,081 506,538 Direct -4.96% Disposed 180.7% (price as of 2026-10-02)
May 6, 2025 ATI S 10b5-1 23,584 $67.76 $1,598,052 532,954 Direct -4.24% Disposed 184.0% (price as of 2026-10-02)
Dec. 4, 2024 ATI S 10b5-1 25,000 $58.99 $1,474,750 436,443 Direct -5.42% Disposed 226.2% (price as of 2026-10-02)
Nov. 15, 2024 ATI S 10b5-1 25,000 $56.35 $1,408,750 461,443 Direct -5.14% Disposed 241.5% (price as of 2026-10-02)
Oct. 15, 2024 ATI S 10b5-1 25,000 $62.23 $1,555,750 486,443 Direct -4.89% Disposed 209.2% (price as of 2026-10-02)
Sept. 16, 2024 ATI S 10b5-1 25,000 $61.61 $1,540,250 511,443 Direct -4.66% Disposed 212.3% (price as of 2026-10-02)
Nov. 1, 2022 ATI S 10b5-1 15,000 $30.23 $453,450 333,753 Direct -4.30% Disposed 536.5% (price as of 2026-10-02)
Oct. 3, 2022 ATI S 10b5-1 15,000 $27.13 $406,950 343,753 Direct -4.18% Disposed 609.3% (price as of 2026-10-02)
Sept. 1, 2022 ATI S 10b5-1 15,000 $29.09 $436,350 363,753 Direct -3.96% Disposed 561.5% (price as of 2026-10-02)
March 16, 2020 ATI P 2,500 $8.70 $21,750 192,140 Direct +1.32% Acquired 2111.7% (price as of 2026-10-02)
Aug. 13, 2019 ATI P 5,000 $18.36 $91,800 113,335 Direct +4.62% Acquired 948.0% (price as of 2026-10-02)

Showing latest 100 of 114 transactions

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
Jan. 5, 2026 ATI Performance Stock Unit Common Stock, par value $0.10 per share (176,106) · Dec. 31, 2026 64,103 Disposed
Jan. 4, 2022 ATI Performance Stock Unit Common Stock (128,205) · Dec. 31, 2025 128,205 Acquired
Jan. 4, 2022 ATI Performance Stock Unit Common Stock (128,205) · Dec. 31, 2025 128,205 Acquired

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
July 15, 2025 GATX Common Stock 0 Direct
March 22, 2023 CMC Common Stock 0 Direct
Jan. 12, 2015 ATI Common Stock, $0.10 par value 8,054 Direct
March 21, 2013 MTX Common Stock 0 Direct
March 21, 2013 MTX Employee Stock Option (Right to Buy)→ Common Stock (27,100) 27,100 Direct
March 21, 2013 MTX Deferred Restricted Stock Units ("DRSUs")→ Common Stock (14,146) 14,146 Direct

Compensation (DEF 14A)

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

MTX

Fiscal yearSalaryBonusStock awards Option awardsNon-equity incentivePension changeOtherTotal
2013 $538,462 · $600,003 $441,415 $500,000 · $103,464 $2,183,344

ATI

Fiscal yearSalaryBonusStock awards Option awardsNon-equity incentivePension changeOtherTotal
2025 $511,538 $500,000 · · · · $220,872 $2,228,649
2024 $903,654 · · · $1,514,420 $5,076 $231,884 $7,173,761
2023 $973,077 · · · $1,632,945 $17,259 $272,477 $7,670,554

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