Montrose Environmental Group, Inc. (ONT) Insider Trading & SEC Filings

Updated Jun 6, 2026 · Last SEC filing 2026-06-05

Montrose Environmental Group, Inc. (ONT) has filed 7 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-05. 3 Form 8-K material event filings were reported by ONT in the last 90 days. InsiderAlpha tracks every ONT SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About Montrose Environmental Group, Inc. (ONT)

SEC CIK	0001643615

90-Day SEC Filing Activity

Form 4 filings (90d)	7
Form 8-K filings (90d)	3
Latest Form 4 filing	2026-06-05

Recent ONT Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-06-03	GRAHAM PETER	Insider	P — Open-market purchase	4.9K	$15.94	$77K	SEC
2026-05-11	Revuelta Jose	Chief Strategy Officer	M — Option exercise	27.3K	$6.03	$165K	SEC
2026-05-11	Dicks Allan	Chief Financial Officer	P — Open-market purchase	6.5K	$15.36	$100K	SEC
2026-03-13	Manthripragada Vijay	President & CEO	M — Option exercise	33.2K	$6.03	$200K	SEC
2026-03-13	Manthripragada Vijay	President & CEO	S — Open-market sale	46.1K	$25.41	$1.17M	SEC
2026-03-13	Manthripragada Vijay	President & CEO	M — Option exercise	86.0K	$6.03	$519K	SEC
2026-03-13	PERLMAN RICHARD E	Insider	G — Bona-fide gift	74.5K	$0.00	—	SEC
2026-03-11	Laws James	Chief Operating Officer	A — Grant or award	18.8K	$0.00	—	SEC
2026-03-09	Revuelta Jose	Chief Strategy Officer	M — Option exercise	7.9K	$6.03	$47K	SEC
2026-03-09	Revuelta Jose	Chief Strategy Officer	S — Open-market sale	7.9K	$27.00	$212K	SEC
2026-03-04	Revuelta Jose	Chief Strategy Officer	A — Grant or award	42.7K	$6.03	$257K	SEC
2026-03-04	Revuelta Jose	Chief Strategy Officer	D — Derivative transaction	42.7K	$27.56	$1.18M	SEC
2026-03-03	Revuelta Jose	Chief Strategy Officer	A — Grant or award	60.0K	$6.03	$362K	SEC
2026-03-03	Afsari Nasym	General Counsel and Secretary	M — Option exercise [10b5-1]	43.3K	$6.03	$261K	SEC
2026-03-03	Revuelta Jose	Chief Strategy Officer	D — Derivative transaction	60.0K	$28.37	$1.70M	SEC

All transactions sourced from SEC EDGAR Form 4 filings for Montrose Environmental Group, Inc. (ONT). Updated in real time as new filings are submitted to the SEC.

Most-Active ONT Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
Manthripragada Vijay	5	$1.89M
Revuelta Jose	5	$424K
Dicks Allan	1	$100K
GRAHAM PETER	1	$77K
PERLMAN RICHARD E	1	—

Recent ONT Form 8-K Material Events

2026-05-11 — Item 5.07 [SEC]
2026-05-06 — Item 2.02, 7.01, 9.01 [SEC]
2026-04-21 — Item 5.03, 7.01, 9.01 · Other · neutral [SEC]
Montrose Environmental Group, Inc. changed its corporate name to Onterris, Inc. effective April 17, 2026, through an amendment to its Certificate of Incorporation filed with Delaware. The name change does not affect voting rights, share validity, or transferability, and the commo
2026-02-25 — Item 2.02, 7.01, 9.01 · Earnings · neutral [SEC]
Montrose Environmental Group announced its financial results for fiscal year 2025 on February 25, 2026, via press release and investor presentation. This is a routine quarterly/annual earnings disclosure with no indication of material surprises, strategic changes, or significant

Recent Insider Filings

2026-06-05 — GRAHAM PETER (Insider)
2026-05-13 — Revuelta Jose (Chief Strategy Officer)
2026-05-13 — Dicks Allan (Chief Financial Officer)
2026-03-16 — Manthripragada Vijay (President & CEO)
2026-03-16 — PERLMAN RICHARD E (Insider)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ONT insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

ONT Insider Trading — FAQ

What is the latest insider trade for ONT?: Montrose Environmental Group, Inc. (ONT) had 7 insider filings in the last 90 days, with the most recent on 2026-06-05. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying ONT stock?: 0 insider purchases of ONT were filed in the last 90 days.
How many insiders are selling ONT stock?: 0 insider sales of ONT were filed in the last 90 days.
Where can I see ONT SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every ONT SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

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