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 ($3.3m this quarter). Holder counts are more reliable. Shares outstanding: 34.1m as of 2024-05-03, 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 ≈ $39.15. Options: 3 managers hold calls ($869.6k notional), 3 hold puts ($560.1k).
Trends to Q1 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 |
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 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2023 | $299.1k | $21.1k | 0.07 |
| Q3 2023 | $339.4k | $78.1k | 0.23 |
| Q4 2023 | $906.0k | $224.9k | 0.25 |
| Q1 2024 | $869.6k | $560.1k | 0.64 |
Biggest buyers
| FIRST TRUST ADVISORS LP | Added | +475.7k |
| FRED ALGER MANAGEMENT, LLC | Added | +232.6k |
| BLAIR WILLIAM & CO/IL | Added | +170.9k |
| Nuveen Asset Management, LLC | Added | +121.0k |
| BAMCO INC /NY/ | Added | +102.5k |
| SANDLER CAPITAL MANAGEMENT | New | +93.8k |
| LORD, ABBETT & CO. LLC | New | +74.6k |
| Lisanti Capital Growth, LLC | New | +55.5k |
| DIMENSIONAL FUND ADVISORS LP | Added | +55.3k |
| Millrace Asset Group, Inc. | New | +53.2k |
Biggest sellers
| BlackRock Inc. | Reduced | -207.2k |
| FMR LLC | Reduced | -171.2k |
| ArrowMark Colorado Holdings LLC | Reduced | -111.9k |
| Invesco Ltd. | Reduced | -104.8k |
| MORGAN STANLEY | Reduced | -96.6k |
| CITADEL ADVISORS LLC | Reduced | -85.0k |
| ROYCE & ASSOCIATES LP | Reduced | -72.6k |
| MARSHALL WACE, LLP | Reduced | -63.6k |
| JPMORGAN CHASE & CO | Reduced | -54.6k |
| Russell Investments Group, Ltd. | Reduced | -52.8k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $493.5k12.6k shares |
| CITADEL ADVISORS LLC | Reduced | $376.0k9.6k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $348.6k8.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $211.5k5.4k 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), WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (3.7%, 2025-11-12)
Insider purchases and sales in Q1 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 |
|---|---|---|---|---|---|
| Q2 2022 | 1 | $999.9k | 0 | — | — |
| Q3 2022 | 0 | — | 0 | — | — |
| 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 | — | — |
None reported in Q1 2024.
Holders, Q1 2024
| Manager | Shares | Change |
|---|---|---|
| BlackRock Inc. 0.00% of their portfolio | 2.3m $90.2m | Reduced -207.2k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.03% of their portfolio | 2.1m $82.4m | Reduced -15.5k |
| VANGUARD GROUP INC 0.00% of their portfolio | 1.5m $60.5m | Added +9.9k |
| Champlain Investment Partners, LLC 0.30% of their portfolio | 1.3m $52.9m | Reduced -16.1k |
| FRED ALGER MANAGEMENT, LLC 0.23% of their portfolio | 1.2m $46.5m | Added +232.6k |
| BAMCO INC /NY/ 0.12% of their portfolio | 1.2m $45.2m | Added +102.5k |
| FEDERATED HERMES, INC. 0.10% of their portfolio | 1.1m $44.7m | Unchanged |
| TRUIST FINANCIAL CORP 0.07% of their portfolio | 1.1m $43.2m | Added +3.8k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 796.1k $31.2m | Added +24.5k |
| BLAIR WILLIAM & CO/IL 0.09% of their portfolio | 732.3k $28.7m | Added +170.9k |
| EMERALD ADVISERS, LLC 1.13% of their portfolio | 718.6k $28.1m | Added +8.2k |
| Granite Investment Partners, LLC 1.00% of their portfolio | 670.9k $26.3m | Reduced -21.0k |
| Stephens Investment Management Group LLC 0.32% of their portfolio | 622.7k $24.4m | Reduced -2.8k |
| STATE STREET CORP 0.00% of their portfolio | 610.4k $23.9m | Added +9.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 603.7k $23.6m | Added +18.9k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.06% of their portfolio | 589.3k $23.1m | Added +3.8k |
| EMERALD MUTUAL FUND ADVISERS TRUST 1.19% of their portfolio | 584.0k $22.9m | Unchanged |
| Nuveen Asset Management, LLC 0.01% of their portfolio | 533.8k $20.9m | Added +121.0k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 501.3k $19.6m | Reduced -3.6k |
| FIRST TRUST ADVISORS LP 0.02% of their portfolio | 488.0k $19.1m | Added +475.7k |
| JANUS HENDERSON GROUP PLC 0.01% of their portfolio | 487.2k $19.1m | Added +2.6k |
| DekaBank Deutsche Girozentrale 0.03% of their portfolio | 470.8k $17.8m | Unchanged |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 469.7k $18.4m | Added +55.3k |
| Invesco Ltd. 0.00% of their portfolio | 421.7k $16.5m | Reduced -104.8k |
| MORGAN STANLEY 0.00% of their portfolio | 392.4k $15.4m | Reduced -96.6k |
| Aperture Investors, LLC 1.78% of their portfolio | 355.7k $13.9m | Added +28.2k |
| Driehaus Capital Management LLC 0.13% of their portfolio | 325.6k $12.8m | Reduced -32.3k |
| ArrowMark Colorado Holdings LLC 0.11% of their portfolio | 259.7k $10.2m | Reduced -111.9k |
| Summit Creek Advisors LLC 1.14% of their portfolio | 229.9k $9.0m | Added +1.6k |
| PEREGRINE CAPITAL MANAGEMENT LLC 0.25% of their portfolio | 223.8k $8.8m | Added +57 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 219.4k $8.6m | Added +2.7k |
| SEGALL BRYANT & HAMILL, LLC 0.13% of their portfolio | 183.2k $7.2m | Reduced -2.6k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.05% of their portfolio | 172.7k $6.8m | Added +7.5k |
| Fisher Asset Management, LLC 0.00% of their portfolio | 168.4k $6.6m | Added +7.8k |
| Candriam S.C.A. 0.04% of their portfolio | 153.1k $6.0m | Added +3.4k |
| ROYCE & ASSOCIATES LP 0.05% of their portfolio | 146.7k $5.7m | Reduced -72.6k |
| Avalon Trust Co 0.44% of their portfolio | 136.7k $5.4m | Added +1.9k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 121.5k $4.8m | Reduced -54.6k |
| MARSHALL WACE, LLP 0.01% of their portfolio | 102.5k $4.0m | Reduced -63.6k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 102.2k $4.0m | Added +6.4k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 101.8k $4.0m | Reduced -11.0k |
| SANDLER CAPITAL MANAGEMENT 0.45% of their portfolio | 93.8k $3.7m | New |
| ESSEX INVESTMENT MANAGEMENT CO LLC 0.68% of their portfolio | 87.9k $3.4m | Added +21.8k |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main 0.00% of their portfolio | 87.2k $3.4m | Added +26.9k |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC 0.04% of their portfolio | 86.1k $3.4m | Added +19.2k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 80.4k $3.1m | Added +11.8k |
| LORD, ABBETT & CO. LLC 0.00% of their portfolio | 74.6k $2.9m | New |
| UBS Group AG 0.00% of their portfolio | 73.6k $2.9m | Reduced -9.6k |
| RICE HALL JAMES & ASSOCIATES, LLC 0.16% of their portfolio | 72.6k $2.8m | Added +109 |
| MACQUARIE GROUP LTD 0.00% of their portfolio | 72.2k $2.8m | Reduced -1.3k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 70.6k $2.8m | Added +32.3k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 63.3k $2.5m | Reduced -18.9k |
| Swiss National Bank 0.00% of their portfolio | 56.5k $2.2m | Unchanged |
| Lisanti Capital Growth, LLC 0.53% of their portfolio | 55.5k $2.2m | New |
| Millrace Asset Group, Inc. 2.09% of their portfolio | 53.2k $2.1m | New |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 51.6k $2.0m | Reduced -25 |
| Creative Planning 0.00% of their portfolio | 50.8k $2.0m | Added +576 |
| Global Alpha Capital Management Ltd. 0.14% of their portfolio | 49.5k $1.9m | New |
| SEI INVESTMENTS CO 0.00% of their portfolio | 49.3k $1.9m | Added +485 |
| CREDIT SUISSE AG/ 0.00% of their portfolio | 48.1k $1.9m | Added +3.2k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 43.5k $1.7m | Reduced -2.8k |
| Legato Capital Management LLC 0.20% of their portfolio | 41.7k $1.6m | Added +16.1k |
| Conestoga Capital Advisors, LLC 0.02% of their portfolio | 41.7k $1.6m | Added +400 |
| VAN ECK ASSOCIATES CORP 0.00% of their portfolio | 39.2k $1.5m | Reduced -42.8k |
| NEXPOINT ASSET MANAGEMENT, L.P. 0.21% of their portfolio | 35.0k $1.4m | New |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.15% of their portfolio | 34.8k $1.4m | Reduced -651 |
| Caprock Group, LLC 0.07% of their portfolio | 32.2k $1.3m | Unchanged |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 32.1k $1.3m | Reduced -85.0k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 29.8k $1.2m | Reduced -43.4k |
| Horrell Capital Management, Inc. 0.32% of their portfolio | 29.4k $1.1m | Added +147 |
| BARCLAYS PLC 0.00% of their portfolio | 29.0k $1.1m | Reduced -20.9k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 28.6k $1.1m | Reduced -1.5k |
| Legal & General Group Plc 0.00% of their portfolio | 26.8k $1.0m | Reduced -49 |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 24.4k $955.7k | Unchanged |
| Naviter Wealth, LLC 0.15% of their portfolio | 23.8k $933.9k | Reduced -1.4k |
| Yarbrough Capital, LLC 0.04% of their portfolio | 23.2k $908.0k | Added +12.2k |
| M&T Bank Corp 0.00% of their portfolio | 22.9k $897.0k | Reduced -5.1k |
| WoodTrust Financial Corp 0.14% of their portfolio | 22.6k $887.0k | Added +3.5k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 22.5k $879.0k | Added +14.1k |
| TUDOR INVESTMENT CORP ET AL 0.01% of their portfolio | 22.4k $879.1k | Added +7.2k |
| GSA CAPITAL PARTNERS LLP 0.07% of their portfolio | 21.8k $855.0k | Reduced -12.4k |
| Pathstone Holdings, LLC 0.00% of their portfolio | 20.2k $789.6k | New |
| BESSEMER GROUP INC 0.00% of their portfolio | 19.5k $763.0k | Added +100 |
| OneDigital Investment Advisors LLC 0.01% of their portfolio | 19.2k $751.6k | Unchanged |
| OPPENHEIMER ASSET MANAGEMENT INC. 0.01% of their portfolio | 18.5k $725.4k | Added +8.1k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 18.1k $708.9k | Added +324 |
| FMR LLC 0.00% of their portfolio | 17.4k $679.7k | Reduced -171.2k |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 17.2k $674.4k | New |
| Numerai GP LLC 0.28% of their portfolio | 16.7k $655.2k | Added +6.8k |
| Cladis Investment Advisory, LLC 0.25% of their portfolio | 16.5k $646.3k | Added +2.0k |
| Carnegie Investment Counsel 0.02% of their portfolio | 16.4k $641.6k | Reduced -7.0k |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 15.9k $622.7k | Reduced -881 |
| NATIXIS ADVISORS, LLC 0.00% of their portfolio | 15.6k $611.0k | Added +1.8k |
| Radnor Capital Management, LLC 0.10% of their portfolio | 14.7k $574.0k | New |
| MetLife Investment Management, LLC 0.00% of their portfolio | 14.1k $550.4k | Unchanged |
| AMERICAN INTERNATIONAL GROUP, INC. 0.00% of their portfolio | 13.9k $544.4k | Added +22 |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 13.1k $514.0k | Added +1.2k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 12.5k $491.3k | Reduced -52.8k |
| Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio | 11.8k $401.5k | Reduced -972 |
| DIVERSIFIED TRUST CO 0.01% of their portfolio | 11.5k $450.5k | Added +2.3k |