MONTROSE ENVIRONMENTAL GROUP ONT
COM · Common Stock · CUSIP 615111101 · ISIN US6151111019
American multinational environmental company
- SectorIndustrials
- IndustryServices-Management Consulting Services
- HeadquartersIrvine, CA
- Websitemontrose-env.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($945.8k this quarter). Holder counts are more reliable. Shares outstanding: 34.3m as of 2024-11-01, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $26.31. Options: 3 managers hold calls ($746.9k notional), 5 hold puts ($1.3m).
Trends to Q3 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 126 |
| Q4 2022 | 131 |
| Q1 2023 | 134 |
| Q2 2023 | 145 |
| Q3 2023 | 153 |
| Q4 2023 | 160 |
| Q1 2024 | 169 |
| Q2 2024 | 174 |
| Q3 2024 | 181 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 58 | 51 |
| Q1 2023 | 67 | 52 |
| Q2 2023 | 82 | 50 |
| Q3 2023 | 75 | 68 |
| Q4 2023 | 82 | 72 |
| Q1 2024 | 89 | 78 |
| Q2 2024 | 111 | 71 |
| Q3 2024 | 113 | 73 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q4 2023 | $906.0k | $224.9k | 0.25 |
| Q1 2024 | $869.6k | $560.1k | 0.64 |
| Q2 2024 | $1.7m | $97.6k | 0.06 |
| Q3 2024 | $746.9k | $1.3m | 1.72 |
Biggest buyers
| MILLENNIUM MANAGEMENT LLC | Added | +858.8k |
| FRED ALGER MANAGEMENT, LLC | Added | +470.7k |
| Alyeska Investment Group, L.P. | Added | +406.6k |
| BANK OF AMERICA CORP /DE/ | Added | +404.4k |
| Voss Capital, LP | New | +381.5k |
| CITADEL ADVISORS LLC | Added | +347.2k |
| Qube Research & Technologies Ltd | New | +287.7k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | New | +258.6k |
| FIRST TRUST ADVISORS LP | Added | +208.1k |
| Squarepoint Ops LLC | Added | +206.3k |
Biggest sellers
| Champlain Investment Partners, LLC | Sold out | -1.3m |
| Driehaus Capital Management LLC | Sold out | -1.1m |
| LOOMIS SAYLES & CO L P | Sold out | -748.6k |
| LORD, ABBETT & CO. LLC | Sold out | -577.4k |
| Invesco Ltd. | Reduced | -285.6k |
| FEDERATED HERMES, INC. | Reduced | -232.0k |
| EMERALD ADVISERS, LLC | Reduced | -210.5k |
| EMERALD MUTUAL FUND ADVISERS TRUST | Reduced | -199.4k |
| CASTLEARK MANAGEMENT LLC | Sold out | -195.1k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Reduced | -150.6k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $736.4k28.0k shares |
| GROUP ONE TRADING LLC | Added | $10.5k400 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| JANE STREET GROUP, LLC | New | $736.4k28.0k shares |
| CITADEL ADVISORS LLC | Added | $334.0k12.7k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $207.8k7.9k shares |
| SIMPLEX TRADING, LLC | Added | $7.0k300 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| FMR LLC 13G · institution new · filed 2026-09-08 | 12.7% |
| BAMCO INC /NY/ 13G · institution -1.7 pts · filed 2025-11-14 | 6.1% |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 13G · institution new · filed 2026-08-14 | 6.0% |
| GOLDMAN SACHS ASSET MANAGEMENT, L.P. 13G · institution new · filed 2026-05-11 | 5.0% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-27), MACQUARIE GROUP LTD (0.0%, 2026-02-13)
Insider purchases and sales in Q3 2024
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2022 | 0 | — | 0 | — | — |
| Q1 2023 | 3 | $1.2m | 1 | $15.0m | — |
| Q2 2023 | 1 | $36.0k | 0 | — | — |
| Q3 2023 | 1 | $329.4k | 0 | — | — |
| Q4 2023 | 2 | $64.0k | 0 | — | — |
| Q1 2024 | 0 | — | 0 | — | — |
| Q2 2024 | 0 | — | 1 | $581.4k | $581.4k |
| Q3 2024 | 0 | — | 0 | — | — |
None reported in Q3 2024.
Holders, Q3 2024
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.00% of their portfolio | 2.6m $68.8m | First filing |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 2.2m $58.2m | Reduced -150.6k |
| FRED ALGER MANAGEMENT, LLC 0.24% of their portfolio | 1.9m $49.1m | Added +470.7k |
| VANGUARD GROUP INC 0.00% of their portfolio | 1.8m $47.1m | Added +40.8k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 1.3m $33.6m | Added +404.4k |
| BAMCO INC /NY/ 0.09% of their portfolio | 1.2m $32.7m | Added +86.0k |
| TRUIST FINANCIAL CORP 0.05% of their portfolio | 1.1m $29.1m | Added +1.8k |
| FEDERATED HERMES, INC. 0.06% of their portfolio | 1.0m $27.3m | Reduced -232.0k |
| MILLENNIUM MANAGEMENT LLC 0.02% of their portfolio | 945.1k $24.9m | Added +858.8k |
| MACQUARIE GROUP LTD 0.02% of their portfolio | 807.2k $21.2m | Reduced -16.7k |
| BLAIR WILLIAM & CO/IL 0.06% of their portfolio | 750.7k $19.7m | Reduced -19.0k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 716.6k $18.8m | Added +23.4k |
| FIRST TRUST ADVISORS LP 0.02% of their portfolio | 705.1k $18.5m | Added +208.1k |
| STATE STREET CORP 0.00% of their portfolio | 679.9k $17.9m | Added +5.7k |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 572.2k $15.0m | Added +30.5k |
| Granahan Investment Management, LLC 0.58% of their portfolio | 556.1k $14.6m | Added +72.8k |
| Alyeska Investment Group, L.P. 0.07% of their portfolio | 549.5k $14.5m | Added +406.6k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.03% of their portfolio | 534.3k $14.1m | Added +16.0k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 533.6k $14.0m | Added +25.2k |
| EMERALD ADVISERS, LLC 0.53% of their portfolio | 525.6k $13.8m | Reduced -210.5k |
| Granite Investment Partners, LLC 0.59% of their portfolio | 523.0k $13.8m | Reduced -74.6k |
| DekaBank Deutsche Girozentrale 0.03% of their portfolio | 505.7k $13.5m | Unchanged |
| JANUS HENDERSON GROUP PLC 0.01% of their portfolio | 484.8k $12.8m | Reduced -275 |
| NORTHERN TRUST CORP 0.00% of their portfolio | 478.0k $12.6m | Reduced -9.7k |
| Stephens Investment Management Group LLC 0.17% of their portfolio | 464.8k $12.2m | Reduced -54.2k |
| EMERALD MUTUAL FUND ADVISERS TRUST 0.55% of their portfolio | 400.2k $10.5m | Reduced -199.4k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 388.7k $10.2m | Added +347.2k |
| Summit Creek Advisors LLC 1.38% of their portfolio | 386.7k $10.2m | Added +180.7k |
| Voss Capital, LP 0.83% of their portfolio | 381.5k $10.0m | New |
| FMR LLC 0.00% of their portfolio | 352.3k $9.3m | Added +35.3k |
| MORGAN STANLEY 0.00% of their portfolio | 348.0k $9.2m | Added +67.1k |
| ROYCE & ASSOCIATES LP 0.08% of their portfolio | 345.1k $9.1m | Added +104.3k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 320.2k $8.4m | Reduced -57.8k |
| Qube Research & Technologies Ltd 0.01% of their portfolio | 287.7k $7.6m | New |
| Ophir Asset Management Pty Ltd 1.13% of their portfolio | 278.1k $7.3m | Reduced -36.3k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 263.7k $6.9m | Added +6.1k |
| Squarepoint Ops LLC 0.02% of their portfolio | 263.4k $6.9m | Added +206.3k |
| ArrowMark Colorado Holdings LLC 0.09% of their portfolio | 263.3k $6.9m | Added +47.8k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.02% of their portfolio | 258.6k $6.8m | New |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 229.7k $6.0m | Reduced -9.7k |
| PEREGRINE CAPITAL MANAGEMENT LLC 0.18% of their portfolio | 227.3k $6.0m | Added +483 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.04% of their portfolio | 224.1k $5.9m | Added +27.0k |
| Avalon Trust Co 0.41% of their portfolio | 210.8k $5.5m | Added +74.2k |
| Candriam S.C.A. 0.03% of their portfolio | 202.3k $5.3m | Added +40.4k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 187.8k $4.9m | Added +58.5k |
| SEGALL BRYANT & HAMILL, LLC 0.06% of their portfolio | 180.9k $4.8m | Reduced -7.4k |
| Fisher Asset Management, LLC 0.00% of their portfolio | 172.5k $4.5m | Added +17.0k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 142.4k $3.7m | Added +87.5k |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 120.7k $3.2m | New |
| Cubist Systematic Strategies, LLC 0.05% of their portfolio | 119.6k $3.1m | New |
| Invesco Ltd. 0.00% of their portfolio | 117.5k $3.1m | Reduced -285.6k |
| Trexquant Investment LP 0.04% of their portfolio | 116.5k $3.1m | New |
| VAN ECK ASSOCIATES CORP 0.00% of their portfolio | 102.3k $2.8m | Added +39.1k |
| ESSEX INVESTMENT MANAGEMENT CO LLC 0.46% of their portfolio | 100.6k $2.6m | Added +262 |
| HARBOR CAPITAL ADVISORS, INC. 0.11% of their portfolio | 94.8k $2.5m | Added +70.2k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 89.8k $2.4m | Added +17.2k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 85.1k $2.2m | Added +43.9k |
| KINGDON CAPITAL MANAGEMENT, L.L.C. 0.31% of their portfolio | 80.0k $2.1m | Added +40.0k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 75.5k $2.0m | Added +41.5k |
| Ghisallo Capital Management LLC 0.09% of their portfolio | 70.0k $1.8m | Unchanged |
| Global Alpha Capital Management Ltd. 0.12% of their portfolio | 69.9k $1.8m | Added +14.6k |
| RICE HALL JAMES & ASSOCIATES, LLC 0.10% of their portfolio | 67.7k $1.8m | Reduced -701 |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC 0.02% of their portfolio | 67.2k $1.8m | Reduced -15.4k |
| Swiss National Bank 0.00% of their portfolio | 63.2k $1.7m | Added +5.9k |
| UBS Group AG 0.00% of their portfolio | 62.6k $1.6m | Added +4.1k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 61.4k $1.6m | Reduced -8.9k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 57.6k $1.5m | Reduced -127 |
| Balyasny Asset Management L.P. 0.00% of their portfolio | 57.4k $1.5m | Added +45.4k |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main 0.00% of their portfolio | 54.1k $1.4m | Reduced -43.6k |
| BARCLAYS PLC 0.00% of their portfolio | 53.6k $1.4m | Added +42.3k |
| Conestoga Capital Advisors, LLC 0.02% of their portfolio | 52.7k $1.4m | Added +11.1k |
| Walleye Capital LLC 0.01% of their portfolio | 50.9k $1.3m | New |
| Assenagon Asset Management S.A. 0.00% of their portfolio | 50.6k $1.3m | New |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 48.5k $1.3m | Added +236 |
| TUDOR INVESTMENT CORP ET AL 0.01% of their portfolio | 46.8k $1.2m | Added +37.0k |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 46.5k $1.2m | Added +30.4k |
| Creative Planning 0.00% of their portfolio | 46.4k $1.2m | Reduced -378 |
| ExodusPoint Capital Management, LP 0.01% of their portfolio | 45.7k $1.2m | New |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.12% of their portfolio | 44.2k $1.2m | Reduced -589 |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 41.4k $1.1m | Reduced -12.4k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 36.6k $961.8k | Unchanged |
| EXCHANGE TRADED CONCEPTS, LLC 0.02% of their portfolio | 36.1k $949.9k | Added +28.0k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 35.1k $923.6k | Reduced -74.8k |
| Legato Capital Management LLC 0.11% of their portfolio | 33.8k $888.8k | Reduced -10.0k |
| Caprock Group, LLC 0.03% of their portfolio | 32.0k $841.6k | Unchanged |
| Point72 Asset Management, L.P. 0.00% of their portfolio | 31.8k $835.2k | New |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 30.6k $804.0k | Added +2.0k |
| Radnor Capital Management, LLC 0.12% of their portfolio | 30.4k $801.0k | New |
| OPPENHEIMER ASSET MANAGEMENT INC. 0.01% of their portfolio | 30.3k $797.6k | Added +8.6k |
| MOODY NATIONAL BANK TRUST DIVISION 0.08% of their portfolio | 29.4k $772.3k | Added +3.4k |
| Lane Generational LLC 0.93% of their portfolio | 28.3k $744.7k | New |
| Legal & General Group Plc 0.00% of their portfolio | 28.3k $744.5k | Added +616 |
| M&T Bank Corp 0.00% of their portfolio | 27.6k $724.8k | Added +4.5k |
| Horrell Capital Management, Inc. 0.20% of their portfolio | 26.6k $669.0k | Reduced -3.0k |
| GSA CAPITAL PARTNERS LLP 0.05% of their portfolio | 26.2k $689.0k | New |
| SYNOVUS FINANCIAL CORP 0.01% of their portfolio | 24.4k $641.4k | Added +18.7k |
| CITIGROUP INC 0.00% of their portfolio | 23.9k $629.2k | Added +16.1k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 23.7k $623.9k | New |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 23.5k $618.6k | Added +8.7k |
| CHARTWELL INVESTMENT PARTNERS, LLC 0.02% of their portfolio | 23.4k $614.0k | Added +5.9k |