Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 88 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

No open-market trades on record; showing all filings.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Aug. 31, 2026 MTRN G 28,832 · · 0 Indirect -100.00% Disposed (price as of 2026-10-02)
Aug. 31, 2026 MTRN G 28,832 · · 28,832 Indirect · Acquired (price as of 2026-10-02)
Aug. 31, 2026 SPXC G 24,892 · · 0 Indirect -100.00% Disposed (price as of 2026-10-02)
Aug. 31, 2026 SPXC G 24,892 · · 24,892 Indirect · Acquired (price as of 2026-10-02)
Aug. 10, 2026 MTRN G 28,832 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
Aug. 10, 2026 MTRN G 28,832 · · 28,832 Indirect · Acquired (price as of 2026-10-02)
Aug. 10, 2026 SPXC G 24,892 · · 754 Direct -97.06% Disposed (price as of 2026-10-02)
Aug. 10, 2026 SPXC G 24,892 · · 24,892 Indirect · Acquired (price as of 2026-10-02)
May 12, 2026 SPXC A 754 · · 25,646 Direct +3.03% Acquired (price as of 2026-10-02)
May 8, 2026 MTRN A 758 · · 758 Direct · Acquired (price as of 2026-10-02)
May 7, 2026 MTRN M 2,006 · · 28,832 Direct +7.48% Acquired (price as of 2026-10-02)
May 7, 2026 MTRN M 2,006 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
March 6, 2026 MTRN A 2 · · 2,006 Direct +0.10% Acquired (price as of 2026-10-02)
Dec. 5, 2025 MTRN A 2 · · 2,004 Direct +0.10% Acquired (price as of 2026-10-02)
Sept. 5, 2025 MTRN A 2 · · 2,002 Direct +0.10% Acquired (price as of 2026-10-02)
June 13, 2025 MTRN A 4 · · 2,000 Direct +0.20% Acquired (price as of 2026-10-02)
May 13, 2025 SPXC A 892 · · 24,892 Direct +3.72% Acquired (price as of 2026-10-02)
May 8, 2025 MTRN A 1,996 · · 1,996 Direct · Acquired (price as of 2026-10-02)
May 7, 2025 MTRN M 1,155 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
May 7, 2025 MTRN M 1,155 · · 26,826 Direct +4.50% Acquired (price as of 2026-10-02)
March 7, 2025 MTRN A 2 · · 1,155 Direct +0.17% Acquired (price as of 2026-10-02)
Dec. 6, 2024 MTRN A 1 · · 1,153 Direct +0.09% Acquired (price as of 2026-10-02)
Sept. 6, 2024 MTRN A 1 · · 1,152 Direct +0.09% Acquired (price as of 2026-10-02)
June 7, 2024 MTRN A 1 · · 1,151 Direct +0.09% Acquired (price as of 2026-10-02)
May 14, 2024 SPXC A 998 · · 24,000 Direct +4.34% Acquired (price as of 2026-10-02)
May 10, 2024 MTRN A 1,150 · · 1,150 Direct · Acquired (price as of 2026-10-02)
May 9, 2024 MTRN M 1,152 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
May 9, 2024 MTRN M 1,152 · · 25,671 Direct +4.70% Acquired (price as of 2026-10-02)
March 8, 2024 MTRN A 1 · · 1,152 Direct +0.09% Acquired (price as of 2026-10-02)
Dec. 8, 2023 MTRN A 1 · · 1,151 Direct +0.09% Acquired (price as of 2026-10-02)
Sept. 7, 2023 MTRN A 1 · · 1,150 Direct +0.09% Acquired (price as of 2026-10-02)
June 15, 2023 MTRN A 1 · · 1,149 Direct +0.09% Acquired (price as of 2026-10-02)
May 18, 2023 MTRN A 1,148 · · 1,148 Direct · Acquired (price as of 2026-10-02)
May 9, 2023 SPXC A 1,770 · · 23,002 Direct +8.34% Acquired (price as of 2026-10-02)
May 5, 2023 MTRN M 1,398 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
May 5, 2023 MTRN M 1,398 · · 24,519 Direct +6.05% Acquired (price as of 2026-10-02)
March 10, 2023 MTRN A 2 · · 1,398 Direct +0.14% Acquired (price as of 2026-10-02)
Dec. 8, 2022 MTRN A 2 · · 1,396 Direct +0.14% Acquired (price as of 2026-10-02)
Sept. 8, 2022 MTRN A 2 · · 1,394 Direct +0.14% Acquired (price as of 2026-10-02)
June 16, 2022 MTRN A 2 · · 1,392 Direct +0.14% Acquired (price as of 2026-10-02)
May 10, 2022 SPXC A 2,882 · · 21,232 Direct +15.71% Acquired (price as of 2026-10-02)
May 5, 2022 MTRN A 1,390 · · 1,390 Direct · Acquired (price as of 2026-10-02)
May 4, 2022 MTRN M 1,246 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
May 4, 2022 MTRN M 1,246 · · 23,121 Direct +5.70% Acquired (price as of 2026-10-02)
March 11, 2022 MTRN A 2 · · 1,246 Direct +0.16% Acquired (price as of 2026-10-02)
Dec. 3, 2021 MTRN A 2 · · 1,244 Direct +0.16% Acquired (price as of 2026-10-02)
Sept. 3, 2021 MTRN A 2 · · 1,242 Direct +0.16% Acquired (price as of 2026-10-02)
June 11, 2021 MTRN A 2 · · 1,240 Direct +0.16% Acquired (price as of 2026-10-02)
May 11, 2021 SPXC A 2,068 · · 18,350 Direct +12.70% Acquired (price as of 2026-10-02)
May 6, 2021 MTRN A 1,238 · · 1,238 Direct · Acquired (price as of 2026-10-02)
May 6, 2021 MTRN M 2,012 $76.73 $154,381 0 Direct -100.00% Disposed 306.8% (price as of 2026-10-02)
May 6, 2021 MTRN M 2,012 $76.73 $154,381 21,875 Direct +10.13% Acquired 306.8% (price as of 2026-10-02)
March 5, 2021 MTRN A 3 · · 2,012 Direct +0.15% Acquired (price as of 2026-10-02)
Nov. 30, 2020 MTRN A 4 · · 2,009 Direct +0.20% Acquired (price as of 2026-10-02)
Sept. 4, 2020 MTRN A 4 · · 2,005 Direct +0.20% Acquired (price as of 2026-10-02)
June 10, 2020 MTRN A 4 · · 2,001 Direct +0.20% Acquired (price as of 2026-10-02)
May 14, 2020 SPXC A 3,941 · · 16,282 Direct +31.93% Acquired (price as of 2026-10-02)
May 14, 2020 MTRN A 1,997 $47.57 $94,997 1,997 Direct · Acquired 556.2% (price as of 2026-10-02)
May 8, 2020 MTRN M 1,391 $51.76 $71,998 0 Direct -100.00% Disposed 503.1% (price as of 2026-10-02)
May 8, 2020 MTRN M 1,391 $51.76 $71,998 19,863 Direct +7.53% Acquired 503.1% (price as of 2026-10-02)
March 6, 2020 MTRN A 3 · · 1,391 Direct +0.22% Acquired (price as of 2026-10-02)
Dec. 4, 2019 MTRN A 3 · · 1,388 Direct +0.22% Acquired (price as of 2026-10-02)
Sept. 5, 2019 MTRN A 2 · · 1,385 Direct +0.14% Acquired (price as of 2026-10-02)
June 5, 2019 MTRN A 2 · · 1,383 Direct +0.14% Acquired (price as of 2026-10-02)
May 10, 2019 SPXC A 3,963 · · 12,341 Direct +47.30% Acquired (price as of 2026-10-02)
May 9, 2019 MTRN A 1,381 $68.79 $94,999 1,381 Direct · Acquired 353.8% (price as of 2026-10-02)
May 3, 2019 MTRN M 1,855 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
May 3, 2019 MTRN M 1,855 $70.40 $130,592 18,472 Direct +11.16% Acquired 343.4% (price as of 2026-10-02)
March 7, 2019 MTRN A 3 · · 1,855 Direct +0.16% Acquired (price as of 2026-10-02)
Dec. 3, 2018 MTRN A 4 · · 1,852 Direct +0.22% Acquired (price as of 2026-10-02)
Sept. 5, 2018 MTRN A 3 · · 1,848 Direct +0.16% Acquired (price as of 2026-10-02)
June 1, 2018 MTRN A 4 · · 1,845 Direct +0.22% Acquired (price as of 2026-10-02)
May 15, 2018 SPXC A 3,887 · · 8,378 Direct +86.55% Acquired (price as of 2026-10-02)
May 3, 2018 MTRN A 2,332 $52.35 $122,080 16,617 Direct +16.32% Acquired 496.3% (price as of 2026-10-02)
May 3, 2018 MTRN A 1,841 $51.60 $94,996 4,782 Direct +62.60% Acquired 505.0% (price as of 2026-10-02)
July 3, 2017 SPXC A 4,491 · · 4,491 Direct · Acquired (price as of 2026-10-02)
May 5, 2017 MTRN A 2,941 $34.40 $101,170 14,285 Direct +25.93% Acquired 807.4% (price as of 2026-10-02)
May 4, 2017 MTRN A 2,332 $34.30 $79,988 5,273 Direct +79.29% Acquired 810.1% (price as of 2026-10-02)
May 4, 2016 MTRN A 2,941 · · 2,941 Direct · Acquired (price as of 2026-10-02)
May 7, 2015 MTRN A 2,098 $38.13 $79,997 11,344 Direct +22.69% Acquired 718.7% (price as of 2026-10-02)
March 3, 2015 MTRN A 5 $36.81 $184 9,246 Direct +0.05% Acquired 748.0% (price as of 2026-10-02)
Nov. 20, 2014 MTRN A 5 $36.11 $181 9,241 Direct +0.05% Acquired 764.5% (price as of 2026-10-02)
Aug. 20, 2014 MTRN A 6 $32.98 $198 9,236 Direct +0.07% Acquired 846.5% (price as of 2026-10-02)
June 4, 2014 MTRN A 5 $34.38 $172 9,230 Direct +0.05% Acquired 808.0% (price as of 2026-10-02)
May 8, 2014 MTRN A 2,463 $32.48 $79,998 9,225 Direct +36.42% Acquired 861.1% (price as of 2026-10-02)
March 6, 2014 MTRN A 7 $34.13 $239 6,762 Direct +0.10% Acquired 814.6% (price as of 2026-10-02)
May 2, 2013 MTRN A 3,186 $25.11 $80,000 6,730 Direct +89.90% Acquired 1143.2% (price as of 2026-10-02)
Feb. 7, 2013 MTRN A 3,544 $28.22 $100,012 3,544 Direct · Acquired 1006.2% (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.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
May 8, 2026 MTRN Restricted Stock Units Common Stock (758) · · 758 Acquired
May 7, 2026 MTRN Restricted Stock Units Common Stock (2,006) · · 2,006 Disposed
March 6, 2026 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
Dec. 5, 2025 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
Sept. 5, 2025 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
June 13, 2025 MTRN Restricted Stock Units Common Stock (4) · · 4 Acquired
May 8, 2025 MTRN Restricted Stock Units Common Stock (1,996) · · 1,996 Acquired
May 7, 2025 MTRN Restricted Stock Units Common Stock (1,155) · · 1,155 Disposed
March 7, 2025 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
Dec. 6, 2024 MTRN Restricted Stock Units Common Stock (1) · · 1 Acquired
Sept. 6, 2024 MTRN Restricted Stock Units Common Stock (1) · · 1 Acquired
June 7, 2024 MTRN Restricted Stock Units Common Stock (1) · · 1 Acquired
May 10, 2024 MTRN Restricted Stock Units Common Stock (1,150) · · 1,150 Acquired
May 9, 2024 MTRN Restricted Stock Units Common Stock (1,152) · · 1,152 Disposed
March 8, 2024 MTRN Restricted Stock Units Common Stock (1) · · 1 Acquired
Dec. 8, 2023 MTRN Restricted Stock Units Common Stock (1) · · 1 Acquired
Sept. 7, 2023 MTRN Restricted Stock Units Common Stock (1) · · 1 Acquired
June 15, 2023 MTRN Restricted Stock Units Common Stock (1) · · 1 Acquired
May 18, 2023 MTRN Restricted Stock Units Common Stock (1,148) · · 1,148 Acquired
May 5, 2023 MTRN Restricted Stock Units Common Stock (1,398) · · 1,398 Disposed
March 10, 2023 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
Dec. 8, 2022 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
Sept. 8, 2022 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
June 16, 2022 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
May 5, 2022 MTRN Restricted Stock Units Common Stock (1,390) · · 1,390 Acquired
May 4, 2022 MTRN Restricted Stock Units Common Stock (1,246) · · 1,246 Disposed
March 11, 2022 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
Dec. 3, 2021 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
Sept. 3, 2021 MTRN Common Stock Common Stock (2) · · 2 Acquired
June 11, 2021 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
May 6, 2021 MTRN Restricted Stock Units Common Stock (1,238) · · 1,238 Acquired
May 6, 2021 MTRN Restricted Stock Units Common Stock (2,012) · · 2,012 Disposed
March 5, 2021 MTRN Restricted Stock Units Common Stock (3) · · 3 Acquired
Nov. 30, 2020 MTRN Restricted Stock Units Common Stock (4) · · 4 Acquired
Sept. 4, 2020 MTRN Restricted Stock Units Common Stock (4) · · 4 Acquired
June 10, 2020 MTRN Common Stock Common Stock (4) · · 4 Acquired
May 14, 2020 MTRN Common Stock Common Stock (1,997) · · 1,997 Acquired
May 8, 2020 MTRN Common Stock Common Stock (1,391) · · 1,391 Disposed
March 6, 2020 MTRN Restricted Stock Unit Common Stock (3) · · 3 Acquired
Dec. 4, 2019 MTRN Restricted Stock Units Common Stock (3) · · 3 Acquired
Sept. 5, 2019 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
June 5, 2019 MTRN Restricted Stock Units Common Stock (2) · · 2 Acquired
May 9, 2019 MTRN Restricted Stock Units Common Stock (1,381) · · 1,381 Acquired
May 3, 2019 MTRN Common Stock Restricted Stock Unit (1,855) · · 1,855 Disposed
March 7, 2019 MTRN Common Stock Restricted Stock Unit (3) · · 3 Acquired
Dec. 3, 2018 MTRN Restricted Stock Units Common Stock (4) · · 4 Acquired
Sept. 5, 2018 MTRN Restricted Stock Units Common Stock (3) · · 3 Acquired
June 1, 2018 MTRN Restricted Stock Units Common Stock (4) · · 4 Acquired
May 3, 2018 MTRN Restricted Stock Unit Common Stock (1,841) · · 1,841 Acquired
May 4, 2017 MTRN Restricted Stock Units [F1] Common Stock (2,332) · · 2,332 Acquired
May 4, 2016 MTRN Restricted Stock Unit Common Stock (2,941) · May 4, 2022 2,941 Acquired

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

Initial ownership (Form 3) 1 holding

07

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

DateTickerSecuritySharesOwnership
July 3, 2017 SPXC No securities are beneficially owned 0 Direct