SCHEDULE 13D/A Filed 2026-06-04 Event 2026-04-27 SEC 0000897101-26-000203 →

Foglia Stephanie Athena → Mistras Group, Inc. MG

Stake: — Shares: 6,329,010 Class: Common Stock, $0.01 par value

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 22/100 · Filer 90d Win Rate: 0% · Hist. 90d Edge: -6.5%

Active Schedule 13D filer baseline
Held by 1 tracked 13F institutional manager

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 2026-10-15

DTC 2.18

738,731 shares short · -21.3% vs prior

Institutional Consensus · 2025-12-31

Held by elite portfolio managers

1 holder · $13.66M

Elliott Investment Mgmt

Post-Filing Returns · since 2026-04-27 on MG

+1 day

0.0%

+5 days

0.0%

+30 days

0.0%

+60 days

0.0%

+90 days

-6.5%

+180 days

—

Anchor price 16.63 on closest trading day on/after 2026-04-27. Source: Yahoo Finance daily adj_close (split + dividend adjusted).

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
2026-10-07	SCHEDULE 13D/A	Foglia Stephanie Athena	—	5,532,313	view →
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 →
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
2026-10-07	SCHEDULE 13D/A	Mistras Group, Inc.	—	5,532,313	view →
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 →

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