John D Grampa

CIK 1209389 · View on SEC EDGAR ↗

Insider

First SEC filing: June 1, 2026 · Latest: June 1, 2026

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Insider at

Insider transactions

0 buys (P) 3 sells (S) Net: $-175,503 + 84 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

84 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
June 23, 2026 PKOH S 2,844 $36.20 $102,953 14,422 Direct -16.47% Disposed 25.1% (price as of 2026-08-20)
June 23, 2026 PKOH S 1,000 $36.25 $36,250 17,266 Direct -5.47% Disposed 25.0% (price as of 2026-08-20)
June 23, 2026 PKOH S 1,000 $36.30 $36,300 18,266 Direct -5.19% Disposed 24.8% (price as of 2026-08-20)
March 18, 2020 PKOH P 5,000 $13.27 $66,350 7,000 Direct +250.00% Acquired 241.4% (price as of 2026-08-20)
Dec. 16, 2015 PKOH P 2,000 $35.59 $71,180 2,000 Direct — Acquired 27.3% (price as of 2026-08-20)
Nov. 10, 2014 MTRN S 3,735 $38.58 $144,096 28,612 Direct -11.55% Disposed 509.4% (price as of 2026-08-20)
May 12, 2014 MTRN S 2,030 $34.79 $70,624 28,565 Direct -6.64% Disposed 575.8% (price as of 2026-08-20)
May 12, 2014 MTRN S 800 $33.81 $27,048 30,595 Direct -2.55% Disposed 595.4% (price as of 2026-08-20)
May 9, 2014 MTRN S 4,670 $33.07 $154,437 28,564 Direct -14.05% Disposed 610.9% (price as of 2026-08-20)
May 8, 2014 MTRN S 700 $33.31 $23,317 28,564 Direct -2.39% Disposed 605.8% (price as of 2026-08-20)
May 8, 2014 MTRN S 6,800 $32.98 $224,264 29,264 Direct -18.86% Disposed 612.9% (price as of 2026-08-20)
May 9, 2013 MTRN S 3,000 $28.55 $85,650 30,567 Direct -8.94% Disposed 723.5% (price as of 2026-08-20)
May 9, 2013 MTRN S 2,000 $28.67 $57,340 33,567 Direct -5.62% Disposed 720.0% (price as of 2026-08-20)
May 9, 2013 MTRN S 2,000 $28.56 $57,120 35,567 Direct -5.32% Disposed 723.2% (price as of 2026-08-20)
May 9, 2013 MTRN S 5,000 $28.65 $143,250 37,567 Direct -11.75% Disposed 720.6% (price as of 2026-08-20)
May 9, 2013 MTRN S 3,000 $28.70 $86,100 42,567 Direct -6.58% Disposed 719.2% (price as of 2026-08-20)

Showing latest 100 of 176 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.

Date Ticker Security Underlying Exercise price Expiration Shares A/D
Aug. 14, 2026 PKOH Restricted Stock Units Common Stock (93) — — 93 Acquired
May 16, 2025 PKOH Restricted Stock Units Common Stock (227) — — 227 Acquired
Feb. 21, 2025 PKOH Restricted Stock Units Common Stock (187) — — 187 Acquired
Nov. 29, 2024 PKOH Restricted Stock Units Common Stock (138) — — 138 Acquired
Aug. 16, 2024 PKOH Restricted Stock Units Common Stock (151) — — 151 Acquired
May 17, 2024 PKOH Restricted Stock Units Common Stock (163) — — 163 Acquired
Feb. 23, 2024 PKOH Restricted Stock Units Common Stock (175) — — 175 Acquired
Dec. 1, 2023 PKOH Restricted Stock Units Common Stock (180) — — 180 Acquired
Aug. 18, 2023 PKOH Restricted Stock Units Common Stock (225) — — 225 Acquired
Aug. 18, 2023 PKOH Restricted Stock Units Common Stock (225) — — 225 Acquired
May 31, 2023 PKOH Restricted Stock Units Common Stock (6,000) — — 6,000 Acquired
May 19, 2023 PKOH Restricted Stock Units Common Stock (227) — — 227 Acquired
Feb. 24, 2023 PKOH Restricted Stock Units Common Stock (258) — — 258 Acquired
Dec. 2, 2022 PKOH Restricted Stock Units Common Stock (261) — — 261 Acquired
Aug. 19, 2022 PKOH Restricted Stock Units Common Stock (184) — — 184 Acquired
June 14, 2022 PKOH Restricted Stock Units Common Stock (5,000) — — 5,000 Acquired
May 20, 2022 PKOH Restricted Stock Units Common Stock (200) — — 200 Acquired
Feb. 25, 2022 PKOH Restricted Stock Units Common Stock (167) — — 167 Acquired
Dec. 3, 2021 PKOH Restricted Stock Units Common Stock (130) — — 130 Acquired
Aug. 20, 2021 PKOH Restricted Stock Units Common Stock (115) — — 115 Acquired
June 22, 2021 PKOH Restricted Stock Units Common Stock (3,270) — — 3,270 Acquired
May 21, 2021 PKOH Restricted Stock Units Common Stock (64) — — 64 Acquired
Feb. 26, 2021 PKOH Restricted Stock Units Common Stock (72) — — 72 Acquired
Nov. 30, 2020 PKOH Restricted Stock Units Common Stock (82) — — 82 Acquired
June 10, 2020 PKOH Restricted Stock Units Common Stock (6,100) — — 6,100 Acquired
Feb. 28, 2020 PKOH Restricted Stock Units Common Stock (63) — — 63 Acquired
Nov. 27, 2019 PKOH Restricted Stock Units Common Stock (49) — — 49 Acquired
Aug. 27, 2019 PKOH Restricted Stock Units Common Stock (59) — — 59 Acquired
May 29, 2019 PKOH Restricted Stock Units Common Stock (46) — — 46 Acquired
May 9, 2019 PKOH Restricted Stock Units Common Stock (2,825) — — 2,825 Acquired
March 1, 2019 PKOH Restricted Stock Units Common Stock (37) — — 37 Acquired
Nov. 28, 2018 PKOH Restricted Stock Units Common Stock (32) — — 32 Acquired
Aug. 27, 2018 PKOH Restricted Stock Units Common Stock (28) — — 28 Acquired
May 29, 2018 PKOH Restricted Stock Units Common Stock (29) — — 29 Acquired
May 10, 2018 PKOH Restricted Stock Units Common Stock (2,300) — — 2,300 Acquired
March 1, 2018 PKOH Restricted Stock Units Common Stock (22) — — 22 Acquired
Nov. 28, 2017 PKOH Restricted Stock Units Common Stock (18) — — 18 Acquired
Aug. 25, 2017 PKOH Restricted Stock Units Common Stock (22) — — 22 Acquired
May 30, 2017 PKOH Restricted Stock Units Common Stock (24) — — 24 Acquired
May 11, 2017 PKOH Restricted Stock Units Common Stock (2,195) — — 2,195 Acquired
March 1, 2017 PKOH Restricted Stock Units Common Stock (13) — — 13 Acquired
Nov. 28, 2016 PKOH Restricted Stock Units Common Stock (14) — — 14 Acquired
Aug. 26, 2016 PKOH Restricted Stock Units Common Stock (16) — — 16 Acquired
May 27, 2016 PKOH Restricted Stock Units Common Stock (7) — — 7 Acquired
May 19, 2016 PKOH Restricted Stock Units Common Stock (3,010) — — 3,010 Acquired
Feb. 29, 2016 PKOH Restricted Stock Units Common Stock (7) — — 7 Acquired
Nov. 30, 2015 PKOH Restricted Stock Units Common Stock (5) — — 5 Acquired
Aug. 28, 2015 PKOH Restricted Stock Units Common Stock (6) — — 6 Acquired
July 23, 2015 PKOH Restricted Stock Units Common Stock (1,600) — — 1,600 Acquired
Nov. 7, 2014 MTRN Stock Appreciation Right Common Stock (14,000) $24.03 May 2, 2016 14,000 Acquired
May 12, 2014 MTRN Employee Stock Option Common Stock (2,830) $17.68 Feb. 8, 2015 2,830 Disposed
May 9, 2014 MTRN Employee Stock Option Common Stock (4,670) $17.58 Feb. 8, 2015 4,670 Disposed
May 8, 2014 MTRN Employee Stock Option Common Stock (7,500) $17.68 Feb. 8, 2015 7,500 Disposed
May 8, 2014 MTRN Stock Appreciation Rights common stock (12,060) $33.29 May 8, 2021 12,060 Acquired
May 9, 2013 MTRN Stock Options Common Stock (15,000) $17.08 Feb. 3, 2014 15,000 Acquired
March 6, 2013 MTRN Stock Appreciation Rights Common Stock (9,959) $28.32 March 6, 2020 9,959 Acquired
March 1, 2012 MTRN Stock Appreciation Rights Common Stock (12,277) $29.45 March 1, 2019 12,277 Acquired
May 4, 2011 MTRN Stock Appreciation Rights Common stock (10,301) $39.30 May 4, 2021 10,301 Acquired
Nov. 2, 2010 MTRN Stock Option (Right to buy) common stock (5,000) $12.15 Feb. 5, 2012 5,000 Acquired
Nov. 2, 2010 MTRN Stock Option (Right to buy) Common Stock (12,000) $22.43 Feb. 6, 2011 12,000 Acquired
May 13, 2010 MTRN Stock Options Common Stock (10,000) $22.43 Feb. 6, 2011 10,000 Acquired
Feb. 22, 2010 MTRN Stock Appreciation Rights Common Stock (16,089) $21.24 Feb. 22, 2020 16,089 Acquired
May 7, 2009 MTRN Stock Options Common stock (8,000) $15.97 Feb. 1, 2010 8,000 Acquired
Feb. 10, 2009 MTRN Stock Appreciation Rights Common Stock (25,671) $15.01 Feb. 10, 2019 25,671 Acquired
Feb. 15, 2008 MTRN Stock Appreciation Rights Common Stock (3,356) $27.78 Feb. 15, 2018 3,356 Acquired
May 7, 2007 MTRN Stock Option (Right to Buy) common stock (6,000) $14.69 Feb. 2, 2009 6,000 Disposed
May 7, 2007 MTRN Stock Option (Right to Buy) common stock (3,000) $16.06 Dec. 1, 2008 3,000 Disposed
Feb. 15, 2007 MTRN Stock Appreciation Right Common stock (4,550) $44.72 Feb. 15, 2017 4,550 Acquired
May 4, 2006 MTRN Employee Stock Optoin (Right to buy) common stock (12,900) $5.55 Feb. 11, 2013 12,900 Disposed
May 3, 2006 MTRN Employee Stock Option (Right to buy) common stock (2,100) $5.55 Feb. 11, 2013 2,100 Disposed
May 2, 2006 MTRN Stock Appreciation Right Common stock (14,000) $24.03 May 1, 2016 14,000 Acquired
Feb. 8, 2005 MTRN Employee Stock Option (Right to buy) common stock (15,000) $17.68 Feb. 8, 2015 15,000 Acquired
Feb. 3, 2004 MTRN Employee Stock Option (Right to buy) common stock (15,000) $17.08 Feb. 3, 2014 15,000 Acquired

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

Compensation (DEF 14A)

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

MTRN

Fiscal year Salary Bonus Stock awards Option awards Non-equity incentive Pension change Other Total
2014 $462,747 — — — $383,410 $204,048 $3,807 $1,678,817
2013 $449,151 — — — $76,500 $31,050 $4,542 $1,060,793
2012 $412,946 — — — $100,408 $189,894 $4,512 $1,172,092

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