SCHEDULE 13D/A Filed 2026-09-18 Event 2026-09-16 SEC 0001193125-26-395732 →

Mill Road Capital III, L.P. → Mistras Group, Inc. MG

Stake: — Shares: 1,938,316 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

5 13D/G filings on this issuer

4 other filings besides this one

Filer Track Record

26 filings by this filer

25 other filings in the data moat

Short Interest · settle 2026-08-31

DTC 4.42

1,097,996 shares short · -5.6% 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
2026-09-14	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 Mill Road Capital III, L.P.

Filed	Form	Issuer	Stake	Shares
2026-01-22	SCHEDULE	ALTA EQUIPMENT GROUP INC. ALTG-PA	13.30%	4,293,208	view →
2025-07-01	SCHEDULE	Landsea Homes Corp	—	—	view →
2025-05-19	SCHEDULE	Landsea Homes Corp	8.80%	3,197,506	view →
2025-03-10	SCHEDULE	Mistras Group, Inc. MG	5.70%	1,763,304	view →
2025-03-04	SCHEDULE	Landsea Homes Corp	6.70%	2,446,467	view →
2025-01-23	SCHEDULE	NATURAL GAS SERVICES GROUP INC NGS	4.30%	530,879	view →
2025-01-16	SCHEDULE	NATURAL GAS SERVICES GROUP INC NGS	6.00%	754,564	view →
2024-07-26	SC	ALTA EQUIPMENT GROUP INC. ALTG-PA	—	—	view →
2024-07-03	SC	ALTA EQUIPMENT GROUP INC. ALTG-PA	—	—	view →
2024-01-12	SC	SUPERIOR INDUSTRIES INTERNATIONAL INC	—	—	view →
2023-12-19	SC	CULP INC CULP	—	—	view →
2023-10-30	SC	SUPERIOR INDUSTRIES INTERNATIONAL INC	—	—	view →
2023-10-05	SC	ALTA EQUIPMENT GROUP INC. ALTG-PA	—	—	view →
2023-06-01	SC	NOODLES & Co NDLS	—	—	view →
2023-05-03	SC	NATURAL GAS SERVICES GROUP INC NGS	—	—	view →
2023-03-14	SC	NOODLES & Co NDLS	—	—	view →
2022-10-25	SC	BIG LOTS INC	—	—	view →
2022-02-07	SC	SUPERIOR INDUSTRIES INTERNATIONAL INC	—	—	view →
2022-01-25	SC	SUPERIOR INDUSTRIES INTERNATIONAL INC	—	—	view →
2021-12-28	SC	SUPERIOR INDUSTRIES INTERNATIONAL INC	—	—	view →

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