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SEC FORM 4 SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940 		 
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OMB Number: 3235-0287
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checkbox unchecked Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
checkbox unchecked Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Foglia Stephanie Athena
(Last) (First) (Middle)
195 CLARKKSVILLE ROAD
(Street)
PRINCETON JUNCTION NJ 08550
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Mistras Group, Inc. [ MG ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director checkbox checked 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
01/05/2026
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
checkbox checked Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 01/05/2026 S 1,000 D $13.6 4,692 I By Spouse
Common Stock 02/03/2026 S 1,000 D $14.6 3,692 I By Spouse
Common Stock 03/03/2026 S 1,000 D $15.5 2,692 I By Spouse
Common Stock 04/17/2026 S 1,000 D $18 1,692 I By Spouse
Common Stock 04/27/2026 G(1) 528,672 D $0 4,722,686 I By GRAT(2)
Common Stock 1,393,324 D
Common Stock 15,366 I By Child
Common Stock 52,547 I By Child
Common Stock 20,106 I By Child
Common Stock 52,547 I By Child
Common Stock 19,005 I By Child
Common Stock 54,008 I By Child
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
1. Name and Address of Reporting Person*
Foglia Stephanie Athena
(Last) (First) (Middle)
195 CLARKKSVILLE ROAD
(Street)
PRINCETON JUNCTION NJ 08550
(City) (State) (Zip)
1. Name and Address of Reporting Person*
2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos
(Last) (First) (Middle)
C/O STEPHANIE FOGLIA
504 HIRAM ROAD
(Street)
PLYMOUTH MEETING PA 19462
(City) (State) (Zip)
Explanation of Responses:
1. Represents an ordinary course annuity payment made by the 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos ("GRAT") pursuant to its terms.
2. The reporting person is the trustee for the GRAT and holds sole power over the voting and disposition of the issuer's common stock held by the GRAT. The reporting person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.
/s/ Stephanie Athena Foglia 06/04/2026
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.