SCHEDULE 13D/A Filed 2026-10-07 Event 2026-09-17 SEC 0001104659-26-114355 →

Foglia Stephanie Athena → Mistras Group, Inc. MG

Stake: — Shares: 5,532,313 Class: Common Stock, $0.01 par value

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

3 transactions

1 buys · 0 sales · 2 awards/exercises

Issuer Cluster

7 13D/G filings on this issuer

6 other filings besides this one

Filer Track Record

5 filings by this filer

4 other filings in the data moat

Short Interest · settle 2026-09-30

DTC 1.29

938,098 shares short · -12.7% vs prior

Institutional Consensus · 2025-12-31

Held by elite portfolio managers

1 holder · $13.66M

Elliott Investment Mgmt

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-09-10	Vahaviolos Aspasia Felice	10%+ owner	Gift	387,093	—	—
2026-09-10	Foglia Stephanie Athena	10%+ owner	Gift	387,093	—	—
2026-05-19	PIZZI CHARLES P	director	Award	6,862	—	—

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

Filed	Form	Filer	Stake	Shares
2026-09-21	SCHEDULE 13D/A	Foglia Stephanie Athena	—	5,532,313	view →
2026-09-18	SCHEDULE 13D/A	Mill Road Capital III, L.P.	6.10%	1,938,316	view →
2026-09-14	SCHEDULE 13D/A	Foglia Stephanie Athena	17.40%	5,532,313	view →
2026-06-12	SCHEDULE 13D/A	Foglia Stephanie Athena	18.60%	5,917,135	view →
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

Filed	Form	Issuer	Stake	Shares
2026-09-21	SCHEDULE 13D/A	Mistras Group, Inc.	—	5,532,313	view →
2026-09-14	SCHEDULE 13D/A	Mistras Group, Inc.	17.40%	5,532,313	view →
2026-06-12	SCHEDULE 13D/A	Mistras Group, Inc. MG	18.60%	5,917,135	view →
2026-06-04	SCHEDULE 13D/A	Mistras Group, Inc. MG	—	6,329,010	view →

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