[Form 3] Mistras Group Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Mistras Group, Inc. (MG) director Aspasia Vahaviolos reported an initial beneficial ownership filing showing ownership of 3,888,563 shares of the company's common stock. The Form 3 discloses the reportable event date as 05/23/2025 and the filing was signed by an attorney-in-fact on 09/10/2025. The filing indicates the shares are directly owned and that this is an initial ownership statement for a company director.

Positive

• Disclosure of direct ownership of 3,888,563 common shares by a company director, increasing transparency
• Form 3 filed in compliance with Section 16(a), satisfying insider reporting requirements

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine initial disclosure showing director's direct stake; signals alignment with shareholders but not a material corporate action.

The Form 3 is a standard initial Section 16 filing documenting Aspasia Vahaviolos as a director and beneficial owner of 3,888,563 shares. This disclosure satisfies reporting obligations and provides transparency on insider ownership. There is no indication of derivative positions, transactions, or changes to governance in this filing. For governance review, the key point is the size and direct nature of the holding, which may affect perceptions of director alignment and independence analyses.

Securities Analyst

TL;DR: A routine insider ownership disclosure; informative for shareholding structure but contains no financial results or market-moving events.

This Form 3 records an initial beneficial ownership of 3,888,563 common shares by a company director, filed pursuant to Section 16(a). The filing contains no trading activity, options, or derivatives and thus does not indicate recent purchases or sales. As a standalone document it provides useful ownership data for cap table analysis but lacks transactional or performance information that would affect near-term valuation or liquidity assessments.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

Vahaviolos Aspasia Felice

(Last) (First) (Middle)

C/O MISTRAS GROUP

195 CLARKSVILLE ROAD

(Street)

PRINCETON JUNCTION 08550

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
05/23/2025

3. Issuer Name and Ticker or Trading Symbol
Mistras Group, Inc. [ MG ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	3,888,563	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Michael C. Keefe, attorney-in-fact for Aspasia Vahaviolos	09/10/2025
	** 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 5 (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.

FAQ

What did the Form 3 filed for Mistras Group (MG) disclose?

The Form 3 discloses that director Aspasia Vahaviolos directly owns 3,888,563 shares of Mistras Group common stock.

When is the event date reported on the Form 3 for MG?

The Date of Event Requiring Statement is listed as 05/23/2025.

Was any derivative or option position reported by the insider on this Form 3?

No. Table II for derivative securities is empty; the filing reports only non-derivative common stock holdings.

Who signed the Form 3 for Aspasia Vahaviolos and when?

The signature block shows /s/ Michael C. Keefe, attorney-in-fact with the date 09/10/2025.

Does this Form 3 indicate any sales or purchases of MG stock?

No. This is an initial ownership statement and does not report any specific transactions or trade amounts.