MONTROSE ENVIRONMENTAL GROUP (ONT)
Institutional ownership reported to the SEC as of Q2 2026, across 25 quarters.
Institutions report 38,044,053 shares against 35,117,424 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Over 100% because an adviser and a sub-adviser can both report the same shares, and both are counted.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $66.2M | 3,274,887 | 0.00% | 8q | +3.9%+$2.5M |
| BAMCO INC /NY/ | $43.2M | 2,137,406 | 0.06% | 24q | -1.4%-$622.0K |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | $42.4M | 2,097,249 | 0.06% | 3q | +36.9%+$11.4M |
| GOLDMAN SACHS GROUP INC | $39.0M | 1,930,869 | 0.00% | 24q | -1.5%-$601.1K |
| Corvex Management LP | $35.8M | 1,770,000 | 1.09% | new | NEW |
| ALLIANCEBERNSTEIN L.P. | $32.6M | 1,490,124 | 0.01% | 22q | +31.8%+$7.9M |
| VANGUARD CAPITAL MANAGEMENT LLC | $29.4M | 1,453,439 | 0.00% | 2q | +1.2%+$349.1K |
| FMR LLC | $29.2M | 1,443,390 | 0.00% | 24q | +154.0%+$17.7M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $25.3M | 1,252,138 | 0.00% | 24q | -17.4%-$5.3M |
| NOMURA HOLDINGS INC | $25.2M | 1,249,241 | 0.03% | new | NEW |
| PRINCIPAL FINANCIAL GROUP INC | $25.1M | 1,244,046 | 0.01% | 3q | -7.6%-$2.1M |
| ROYCE & ASSOCIATES LP | $22.1M | 1,094,077 | 0.18% | 12q | +14.6%+$2.8M |
| DIMENSIONAL FUND ADVISORS LP | $20.3M | 1,004,066 | 0.00% | 18q | +16.9%+$2.9M |
| Amundi | $18.8M | 928,651 | 0.00% | 2q | +5.5%+$984.8K |
| UBS Group AG | $18.7M | 927,315 | 0.00% | 24q | +318.1%+$14.3M |
| GEODE CAPITAL MANAGEMENT, LLC | $17.6M | 869,267 | 0.00% | 24q | +8.2%+$1.3M |
| Legal & General Group Plc | $16.5M | 817,998 | 0.00% | 24q | +8.5%+$1.3M |
| STATE STREET CORP | $16.1M | 798,858 | 0.00% | 24q | +9.7%+$1.4M |
| TRUIST FINANCIAL CORP | $16.0M | 792,718 | 0.02% | 22q | HELD |
| Stephens Investment Management Group LLC | $14.9M | 736,768 | 0.16% | 24q | +6.0%+$844.5K |
| Assenagon Asset Management S.A. | $14.5M | 715,552 | 0.01% | new | NEW |
| MORGAN STANLEY | $12.5M | 618,246 | 0.00% | 24q | +21.5%+$2.2M |
| DekaBank Deutsche Girozentrale | $10.8M | 505,697 | 0.02% | 24q | HELD |
| MILLENNIUM MANAGEMENT LLC | $8.9M | 441,155 | 0.00% | 12q | +41.8%+$2.6M |
| NORTHERN TRUST CORP | $8.1M | 401,858 | 0.00% | 24q | +17.7%+$1.2M |
| Allspring Global Investments Holdings, LLC | $7.7M | 383,435 | 0.01% | 3q | -2.7%-$211.7K |
| ArrowMark Colorado Holdings LLC | $6.9M | 339,464 | 0.29% | 12q | +142.6%+$4.0M |
| Fisher Asset Management, LLC | $6.7M | 332,025 | 0.00% | 16q | -5.8%-$415.2K |
| Caption Management, LLC | $6.5M incl. $5.2M options CALL+PUT | 63,807 | 0.03% | 7q | HELD |
| Private Capital Management, LLC | $6.0M | 297,305 | 0.53% | new | NEW |
| Russell Investments Group, Ltd. | $6.0M | 294,923 | 0.01% | 24q | +46.4%+$1.9M |
| TUDOR INVESTMENT CORP ET AL | $5.8M | 285,428 | 0.01% | 4q | +69.2%+$2.4M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $5.7M | 280,914 | 0.00% | 2q | -0.9%-$52.7K |
| BANK OF AMERICA CORP /DE/ | $5.6M | 276,662 | 0.00% | 24q | -25.8%-$1.9M |
| Summit Creek Advisors LLC | $5.6M | 274,713 | 1.89% | 23q | -46.3%-$4.8M |
| CenterBook Partners LP | $5.3M | 264,299 | 0.26% | 4q | +88.1%+$2.5M |
| Granahan Investment Management, LLC | $5.2M | 259,703 | 0.19% | 4q | +7.4%+$362.1K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $4.8M | 239,951 | 0.00% | 24q | -12.1%-$668.8K |
| VANGUARD FIDUCIARY TRUST CO | $4.5M | 221,229 | 0.00% | 2q | +4.3%+$184.3K |
| CITADEL ADVISORS LLC | $4.3M incl. $658.8K options CALL | 182,185 | 0.00% | 24q | -18.2%-$962.6K |
| Raiffeisen Bank International AG | $4.1M | 200,000 | 0.05% | 2q | +130.8%+$2.3M |
| Invesco Ltd. | $4.0M | 197,296 | 0.00% | 22q | +8.7%+$319.2K |
| PANAGORA ASSET MANAGEMENT INC | $3.7M | 181,929 | 0.01% | 4q | +35.6%+$965.1K |
| Global Alpha Capital Management Ltd. | $3.5M | 173,335 | 0.21% | 10q | +21.2%+$613.2K |
| BLAIR WILLIAM & CO/IL | $3.5M | 173,037 | 0.01% | 23q | -35.2%-$1.9M |
| Nuveen, LLC | $3.2M | 158,617 | 0.00% | 6q | -41.8%-$2.3M |
| OP Asset Management Ltd | $3.2M | 156,157 | 0.03% | 6q | HELD |
| Penn Capital Management Company, LLC | $2.8M | 138,744 | 0.18% | new | NEW |
| Rockefeller Capital Management L.P. | $2.6M | 131,010 | 0.00% | 10q | +2.2%+$57.0K |
| NORDEA INVESTMENT MANAGEMENT AB | $2.5M | 124,250 | 0.00% | 3q | +58.0%+$916.3K |
| NEXPOINT ASSET MANAGEMENT, L.P. | $2.2M | 110,353 | 0.15% | new | NEW |
| Bank of New York Mellon Corp | $2.2M | 106,721 | 0.00% | 24q | +7.3%+$147.0K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | $2.1M | 102,024 | 0.00% | 6q | -14.2%-$341.3K |
| XTX Topco Ltd | $2.0M | 101,274 | 0.03% | 3q | +175.5%+$1.3M |
| Conestoga Capital Advisors, LLC | $2.0M | 96,555 | 0.04% | 18q | +15.6%+$263.5K |
| CITIGROUP INC | $1.9M | 95,465 | 0.00% | 24q | -39.0%-$1.2M |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $1.7M | 85,054 | 0.03% | new | NEW |
| Empowered Funds, LLC | $1.7M | 85,054 | 0.01% | new | NEW |
| SEI INVESTMENTS CO | $1.6M | 78,853 | 0.00% | 21q | -48.9%-$1.5M |
| BNP PARIBAS FINANCIAL MARKETS | $1.4M | 68,979 | 0.00% | 7q | -54.1%-$1.6M |
| Swiss National Bank | $1.4M | 67,100 | 0.00% | 23q | +1.5%+$20.2K |
| Holcombe Financial, Inc. | $1.3M | 63,221 | 0.72% | 7q | +32.7%+$314.7K |
| ALGERT GLOBAL LLC | $1.2M | 58,442 | 0.01% | 5q | -90.2%-$10.9M |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd | $1.2M | 57,781 | 0.07% | 5q | +16.6%+$166.5K |
| Cladis Investment Advisory, LLC | $1.1M | 56,800 | 0.54% | 7q | +7.4%+$78.8K |
| WELLS FARGO & COMPANY/MN | $1.1M | 56,242 | 0.00% | 24q | +0.6%+$6.2K |
| Creative Planning | $1.1M | 55,364 | 0.00% | 22q | +1.9%+$21.0K |
| HARBOR CAPITAL ADVISORS, INC. | $1.1M | 53,987 | 0.07% | 4q | +41.2%+$318.2K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.1M CALL | options only | 0.00% | 11q | OPTIONS |
| Avalon Trust Co | $1.0M | 51,172 | 0.06% | 14q | -88.3%-$7.8M |
| RHUMBLINE ADVISERS | $1.0M | 51,129 | 0.00% | new | NEW |
| Connor, Clark & Lunn Investment Management Ltd. | $961.4K | 47,570 | 0.00% | 7q | -55.7%-$1.2M |
| SIMPLEX TRADING, LLC | $928.9K incl. $788.2K options CALL+PUT | 6,963 | 0.00% | new | NEW |
| JUPITER ASSET MANAGEMENT LTD | $869.6K | 43,026 | 0.00% | 3q | +138.6%+$505.2K |
| FRANKLIN RESOURCES INC | $864.3K | 42,766 | 0.00% | 5q | +37.1%+$233.9K |
| DEUTSCHE BANK AG\ | $836.7K | 41,402 | 0.00% | 24q | +26.9%+$177.3K |
| VICTORY CAPITAL MANAGEMENT INC | $793.2K | 39,250 | 0.00% | new | NEW |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $745.8K | 36,902 | 0.00% | 24q | +23.8%+$143.2K |
| PRICE T ROWE ASSOCIATES INC /MD/ | $709.0K | 35,047 | 0.00% | 13q | +14.1%+$87.4K |
| ROYAL BANK OF CANADA | $673.0K | 33,315 | 0.00% | 23q | +17.2%+$98.8K |
| Boston Partners | $649.0K | 32,113 | 0.00% | new | NEW |
| MANAGED ASSET PORTFOLIOS, LLC | $631.7K | 31,255 | 0.07% | 8q | +5.2%+$31.4K |
| AQR CAPITAL MANAGEMENT LLC | $599.1K | 29,642 | 0.00% | 5q | -73.3%-$1.6M |
| IMC-Chicago, LLC | $598.2K CALL+PUT | options only | 0.00% | new | OPTIONS |
| Pinnacle Financial Partners, Inc. | $552.4K | 27,333 | 0.00% | 3q | HELD |
| EQUITABLE TRUST CO | $494.6K | 24,475 | 0.02% | new | NEW |
| Mariner, LLC | $490.2K | 24,257 | 0.00% | 5q | -38.0%-$300.0K |
| Freestone Grove Partners LP | $475.1K | 23,509 | 0.00% | new | NEW |
| Quantinno Capital Management LP | $461.4K | 22,832 | 0.00% | 2q | +85.2%+$212.3K |
| Horrell Capital Management, Inc. | $407.3K | 20,154 | 0.19% | 18q | -9.8%-$44.1K |
| MetLife Investment Management, LLC | $404.2K | 20,002 | 0.00% | 24q | +5.4%+$20.8K |
| VANGUARD ASSET MANAGEMENT, Ltd | $401.7K | 19,875 | 0.00% | 2q | HELD |
| State of Wyoming | $368.6K | 18,237 | 0.04% | 2q | +96.2%+$180.7K |
| STIFEL FINANCIAL CORP | $344.4K | 17,043 | 0.00% | 23q | -29.7%-$145.3K |
| JPMORGAN CHASE & CO | $344.4K | 16,875 | 0.00% | 24q | +0.9%+$3.0K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $318.9K | 15,780 | 0.00% | 9q | +1.8%+$5.7K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | $300.3K | 14,860 | 0.00% | 19q | HELD |
| Jupiter Topco LLC | $294.2K | 14,523 | 0.00% | new | FIRST |
| Vanguard Global Advisers, LLC | $264.2K | 13,072 | 0.00% | 2q | HELD |
| Groupe la Francaise | $263.0K | 13,000 | 0.00% | 5q | +8.3%+$20.2K |
Showing the largest 100 of 158 reported holders.
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-10-08 | 2026-10-07 | Directors or officers departed or appointed | filing |
| 2026-08-10 | 2026-08-05 | Material agreement entered Charter or bylaws amended | filing |
| 2026-08-05 | 2026-08-05 | Material agreement entered Charter or bylaws amended | filing |
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-05 | GRAHAM PETER | Director | Bought | 25,140 | $432.2K |
| 2026-05-11 | Dicks Allan | Chief Financial Officer | Bought | 6,535 | $100.4K |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 29 | $9.2M | 672,689 | 7 | 2 | 12 | 0.0% |
| Q2 2026 | 158 | $780.4M | 38,044,053 | 26 | 63 | 49 | 1.1% |
| Q1 2026 | 172 | $750.3M | 33,856,074 | 18 | 56 | 57 | 0.8% |
| Q4 2025 | 187 | $843.0M | 32,935,879 | 29 | 62 | 60 | 1.6% |
| Q3 2025 | 189 | $914.1M | 32,590,810 | 42 | 60 | 58 | 2.1% |
| Q2 2025 | 164 | $779.4M | 34,406,627 | 24 | 67 | 48 | 3.4% |
| Q1 2025 | 170 | $511.5M | 34,374,130 | 25 | 63 | 53 | 4.2% |
| Q4 2024 | 165 | $639.0M | 33,685,503 | 27 | 67 | 47 | 2.3% |
| Q3 2024 | 181 | $878.9M | 33,322,019 | 36 | 75 | 39 | 0.2% |
| Q2 2024 | 175 | $1.5B | 33,010,221 | 39 | 73 | 35 | 0.1% |
| Q1 2024 | 167 | $1.1B | 27,051,393 | 27 | 58 | 55 | 0.1% |
| Q4 2023 | 159 | $857.8M | 26,665,595 | 21 | 60 | 53 | 0.1% |
| Q3 2023 | 152 | $778.3M | 26,593,512 | 24 | 53 | 46 | 0.1% |
| Q2 2023 | 141 | $1.1B | 27,114,410 | 21 | 59 | 35 | 0.0% |
| Q1 2023 | 132 | $1.0B | 28,610,105 | 18 | 49 | 36 | 0.3% |
| Q4 2022 | 130 | $1.2B | 27,748,827 | 13 | 40 | 41 | 0.2% |
| Q3 2022 | 121 | $918.3M | 27,229,680 | 10 | 45 | 34 | 0.2% |
| Q2 2022 | 125 | $1.2B | 35,285,297 | 9 | 54 | 41 | 0.3% |
| Q1 2022 | 141 | $1.8B | 34,884,200 | 21 | 52 | 45 | 0.2% |
| Q4 2021 | 144 | $2.2B | 31,650,913 | 20 | 57 | 35 | 0.6% |
| Q3 2021 | 142 | $1.8B | 29,201,772 | 36 | 59 | 28 | 0.5% |
| Q2 2021 | 122 | $1.3B | 24,313,814 | 26 | 45 | 38 | 1.3% |
| Q1 2021 | 108 | $1.2B | 23,064,047 | 25 | 46 | 32 | 1.4% |
| Q4 2020 | 97 | $586.3M | 18,718,778 | 39 | 35 | 14 | 1.1% |
| Q3 2020 | 69 | $433.1M | 17,997,133 | 70 | 0 | 0 | 1.0% |
