MTRN

SEC source: 0001104657-24-000148 · wk-form4_1731071770.xml · derivative · entry 3

Vijayvargiya Jugal K. · CIK 0001541300 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 24,791 shares

Expires 2025-03-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The Stock Appreciation Rights vested in three equal annual installments beginning March 1, 2019.

SEC source: 0001104657-24-000148 · wk-form4_1731071770.xml · nonDerivative · entry 2

Vijayvargiya Jugal K. · CIK 0001541300 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 101,091

SEC source: 0001104657-24-000148 · wk-form4_1731071770.xml · nonDerivative · entry 1

Vijayvargiya Jugal K. · CIK 0001541300 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 117,801

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104657-24-000147 · wk-form4_1730929895.xml · nonDerivative · entry 1

Chemnitz Gregory R. · CIK 0001519910 · VP General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,031

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.695 to $105.490, inclusive.

F2 · price: The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) of this Form 4.

SEC source: 0001104657-24-000134 · wk-form4_1728056792.xml · nonDerivative · entry 1

SHULAR CRAIG S · CIK 0001078942 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held In Directors Deferred Comp. Plan

Disclosed balance after: 49,842.644

SEC source: 0001104657-24-000135 · wk-form4_1728056802.xml · nonDerivative · entry 1

Prevost Patrick M. · CIK 0001422978 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held In Directors Deferred Comp. Plan

Disclosed balance after: 13,837.495

SEC source: 0001104657-24-000123 · wk-form4_1725988068.xml · derivative · entry 3

SHULAR CRAIG S · CIK 0001078942 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,152

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000123 · wk-form4_1725988068.xml · nonDerivative · entry 1

SHULAR CRAIG S · CIK 0001078942 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held In Directors Deferred Comp. Plan

Disclosed balance after: 49,604.644

SEC source: 0001104657-24-000129 · wk-form4_1725988132.xml · derivative · entry 1

Toth Robert B · CIK 0001392923 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,152

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000128 · wk-form4_1725988121.xml · derivative · entry 2

REDDY N MOHAN · CIK 0001209386 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,152

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000128 · wk-form4_1725988121.xml · nonDerivative · entry 1

REDDY N MOHAN · CIK 0001209386 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held in Directors Deferred Compensation Plan.

Disclosed balance after: 44,851.951

SEC source: 0001104657-24-000127 · wk-form4_1725988111.xml · derivative · entry 3

KHILNANI VINOD M · CIK 0001204034 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,152

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the Restricted Stock Units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000127 · wk-form4_1725988111.xml · nonDerivative · entry 1

KHILNANI VINOD M · CIK 0001204034 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held in Directors Deferred Compensation Plan.

Disclosed balance after: 18,703.934

SEC source: 0001104657-24-000126 · wk-form4_1725988099.xml · derivative · entry 1

Vijayvargiya Jugal K. · CIK 0001541300 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,355

Underlying: Common Stock · 20 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit (RSU) represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate.

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000125 · wk-form4_1725988088.xml · derivative · entry 3

LIGGETT EMILY M · CIK 0001231898 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,152

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000125 · wk-form4_1725988088.xml · nonDerivative · entry 1

LIGGETT EMILY M · CIK 0001231898 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held in Directors Deferred Comp. Plan

Disclosed balance after: 1,260.64

SEC source: 0001104657-24-000124 · wk-form4_1725988078.xml · derivative · entry 1

Chadwick Shelly Marie · CIK 0001688289 · Vice President, Finance & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,523

Underlying: Common Stock · 15 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate.

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000122 · wk-form4_1725988057.xml · derivative · entry 3

PHILLIPPY ROBERT J · CIK 0001213190 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,152

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000122 · wk-form4_1725988057.xml · nonDerivative · entry 1

PHILLIPPY ROBERT J · CIK 0001213190 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held in Directors Deferred Compensation Plan

Disclosed balance after: 11,933.443

SEC source: 0001104657-24-000121 · wk-form4_1725988047.xml · derivative · entry 1

Chemnitz Gregory R. · CIK 0001519910 · VP General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,544

Underlying: Common Stock · 6 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate.

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000120 · wk-form4_1725988036.xml · derivative · entry 2

Prevost Patrick M. · CIK 0001422978 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,152

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000120 · wk-form4_1725988036.xml · nonDerivative · entry 1

Prevost Patrick M. · CIK 0001422978 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held In Directors Deferred Comp. Plan

Disclosed balance after: 13,625.495

SEC source: 0001104657-24-000119 · wk-form4_1725988025.xml · derivative · entry 1

Solomon Darlene J. S. · CIK 0001526849 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,152

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000117 · wk-form4_1723493166.xml · nonDerivative · entry 4

Vijayvargiya Jugal K. · CIK 0001541300 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,010

SEC source: 0001104657-24-000117 · wk-form4_1723493166.xml · nonDerivative · entry 3

Vijayvargiya Jugal K. · CIK 0001541300 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,191

F2 · price: The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (3), and (4) of this Form 4.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $111.80 to $112.32, inclusive.

SEC source: 0001104657-24-000117 · wk-form4_1723493166.xml · nonDerivative · entry 2

Vijayvargiya Jugal K. · CIK 0001541300 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 95,009

F2 · price: The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (3), and (4) of this Form 4.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.85 to $111.79, inclusive.

SEC source: 0001104657-24-000118 · wk-form4_1723493176.xml · nonDerivative · entry 1

Chemnitz Gregory R. · CIK 0001519910 · VP General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,031

SEC source: 0001104657-24-000117 · wk-form4_1723493166.xml · nonDerivative · entry 1

Vijayvargiya Jugal K. · CIK 0001541300 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 109,898

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $113.00 to $113.39, inclusive.

F2 · price: The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (3), and (4) of this Form 4.

SEC source: 0001104657-24-000103 · wk-form4_1720546402.xml · nonDerivative · entry 1

SHULAR CRAIG S · CIK 0001078942 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held In Directors Deferred Comp. Plan

Disclosed balance after: 49,541.067

SEC source: 0001104657-24-000102 · wk-form4_1720546391.xml · nonDerivative · entry 1

Prevost Patrick M. · CIK 0001422978 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held In Directors Deferred Comp. Plan

Disclosed balance after: 13,608.032

SEC source: 0001104657-24-000092 · wk-form4_1718048928.xml · derivative · entry 3

SHULAR CRAIG S · CIK 0001078942 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,151

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000092 · wk-form4_1718048928.xml · nonDerivative · entry 1

SHULAR CRAIG S · CIK 0001078942 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held In Directors Deferred Comp. Plan

Disclosed balance after: 49,324.067

SEC source: 0001104657-24-000097 · wk-form4_1718048990.xml · derivative · entry 1

Vijayvargiya Jugal K. · CIK 0001541300 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,335

Underlying: Common Stock · 19 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit (RSU) represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the Restricted Stock Units to which they relate.

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000096 · wk-form4_1718048976.xml · derivative · entry 1

Toth Robert B · CIK 0001392923 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,151

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000095 · wk-form4_1718048964.xml · derivative · entry 3

KHILNANI VINOD M · CIK 0001204034 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,151

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000095 · wk-form4_1718048964.xml · nonDerivative · entry 1

KHILNANI VINOD M · CIK 0001204034 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held in Directors Deferred Compensation Plan.

Disclosed balance after: 18,679.961

SEC source: 0001104657-24-000094 · wk-form4_1718048953.xml · derivative · entry 1

Solomon Darlene J. S. · CIK 0001526849 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,151

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000093 · wk-form4_1718048941.xml · derivative · entry 1

Chadwick Shelly Marie · CIK 0001688289 · Vice President, Finance & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,508

Underlying: Common Stock · 15 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate.

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000091 · wk-form4_1718048917.xml · derivative · entry 3

LIGGETT EMILY M · CIK 0001231898 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,151

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000091 · wk-form4_1718048917.xml · nonDerivative · entry 1

LIGGETT EMILY M · CIK 0001231898 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held in Directors Deferred Comp. Plan

Disclosed balance after: 1,259.022

SEC source: 0001104657-24-000090 · wk-form4_1718048904.xml · derivative · entry 1

Chemnitz Gregory R. · CIK 0001519910 · VP General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,538

Underlying: Common Stock · 6 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate.

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000089 · wk-form4_1718048892.xml · derivative · entry 2

REDDY N MOHAN · CIK 0001209386 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,151

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000089 · wk-form4_1718048892.xml · nonDerivative · entry 1

REDDY N MOHAN · CIK 0001209386 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held in Directors Deferred Compensation Plan.

Disclosed balance after: 44,794.465

SEC source: 0001104657-24-000088 · wk-form4_1718048879.xml · derivative · entry 3

PHILLIPPY ROBERT J · CIK 0001213190 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,151

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000088 · wk-form4_1718048879.xml · nonDerivative · entry 1

PHILLIPPY ROBERT J · CIK 0001213190 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held in Directors Deferred Compensation Plan

Disclosed balance after: 11,918.148

SEC source: 0001104657-24-000087 · wk-form4_1718048867.xml · derivative · entry 2

Prevost Patrick M. · CIK 0001422978 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,151

Underlying: Common Stock · 1 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a right to receive one share of MTRN common stock.

F2 · derivative.exercise_date: These units, which were acquired upon the reinvestment of dividend equivalents, will vest at the same time as the restricted stock units to which they relate (earlier of May 10, 2025 and the date of the next annual meeting of MTRN's shareholders).

F3 · derivative.expiration_date: Expiration Date is the same as the Date Exercisable.

SEC source: 0001104657-24-000087 · wk-form4_1718048867.xml · nonDerivative · entry 1

Prevost Patrick M. · CIK 0001422978 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held In Directors Deferred Comp. Plan

Disclosed balance after: 13,414.032

SEC source: 0001104657-24-000082 · wk-form4_1715951459.xml · nonDerivative · entry 1

LIGGETT EMILY M · CIK 0001231898 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,621

SEC source: 0001104657-24-000081 · wk-form4_1715788270.xml · nonDerivative · entry 3

Chemnitz Gregory R. · CIK 0001519910 · VP General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,031

F2 · price: The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (3) and (4) of this Form 4.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $114.210 to $114.410, inclusive.

SEC source: 0001104657-24-000081 · wk-form4_1715788270.xml · nonDerivative · entry 2

Chemnitz Gregory R. · CIK 0001519910 · VP General Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,247

F2 · price: The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (3) and (4) of this Form 4.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $113.035 to $113.910, inclusive.