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SCHEDULE 13D/A Filed 2026-06-12 Event 2026-06-10 SEC 0001104659-26-073638 →

Foglia Stephanie Athena Mistras Group, Inc. MG

Stake: 18.60% Shares: 5,917,135 CUSIP: 60649T107 Class: Common Stock, $0.01 par value

Item 4 — Purpose of Transaction

The Reporting Persons acquired, and presently beneficially own, shares of the issuer's common stock for investment purposes. None of the Reporting Persons currently has any plans or proposals that would result in or relate to any of the transactions or changes listed in Items 4(a) through 4(j) of Schedule 13D. However, as part of their ongoing evaluation of their investment and investment alternatives, the Reporting Persons may consider such matters and, subject to applicable law, may formulate a plan with respect to such matters or make formal proposals to the board of directors of the issuer, other stockholders of the issuer, or other third parties regarding such matters. The Reporting Persons reserve the right to acquire additional securities of the issuer in the open markets, in privately negotiated transactions (which may be with the issuer or with third parties) or otherwise, to dispose of all or a portion of their holdings of securities of the issuer, or to change their intention with respect to any or all of the matters referred to in this Item 4.

Cross-References

Insider Activity (last 365d)
1 transaction
1 buys · 0 sales · 0 awards/exercises
Issuer Cluster
3 13D/G filings on this issuer
2 other filings besides this one
Filer Track Record
2 filings by this filer
1 other filing in the data moat
Short Interest · settle 2026-07-15
DTC 6.80
1,225,327 shares short · +29.2% vs prior

Institutional Consensus · 2025-12-31

Held by elite portfolio managers
1 holder · $13.66M
Elliott Investment Mgmt

Post-Filing Returns · since 2026-06-10 on MG

+1 day
0.0%
+5 days
0.0%
+30 days
-2.2%
+60 days
+90 days
+180 days

Anchor price 16.63 on closest trading day on/after 2026-06-10. Source: Yahoo Finance daily adj_close (split + dividend adjusted).

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-05-19 PIZZI CHARLES P director Award 6,862

Other 13D/G Filings on Mistras Group, Inc.

FiledFormFilerStakeShares
2026-06-04 SCHEDULE 13D/A Foglia Stephanie Athena 6,329,010 view →
2025-03-10 SCHEDULE Mill Road Capital III, L.P. 5.70% 1,763,304 view →

Other Filings by Foglia Stephanie Athena

FiledFormIssuerStakeShares
2026-06-04 SCHEDULE 13D/A Mistras Group, Inc. MG 6,329,010 view →

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