Vault-13

MONTROSE ENVIRONMENTAL GROUP ONT

COM · Common Stock · CUSIP 615111101 · ISIN US6151111019

American multinational environmental company

145 institutional holders +11 vs Q1 2023
27,029,44827.0m shares reported held*
89.6% of all shares outstanding*
$1.1bnreported value*
21 new 61 added 38 reduced 12 sold out net sold ≈ $59.0m (-1.5m shares)

* 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 ($4.3m this quarter). Holder counts are more reliable. Shares outstanding: 30.2m as of 2023-08-03, 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 ≈ $41.55. Options: 2 managers hold calls ($299.1k notional), 2 hold puts ($21.1k).

Trends to Q2 2023

Institutional holders

Managers reporting a position, each quarter

050100150Q3 22: 126Q4 22: 131Q1 23: 134Q2 23: 145145Q3 22Q4 22Q1 23Q2 23
Numbers
QuarterHolders
Q3 2022126
Q4 2022131
Q1 2023134
Q2 2023145

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q4 22: 58 bought or addedQ4 22: 51 cut or sold outQ4 22Q1 23: 67 bought or addedQ1 23: 52 cut or sold outQ1 23Q2 23: 82 bought or addedQ2 23: 50 cut or sold outQ2 23
Numbers
QuarterBought or addedCut or sold out
Q4 20225851
Q1 20236752
Q2 20238250

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$1m$2m$3mQ3 22 calls: $972.0kQ3 22 puts: $847.0kQ3 22P/C 0.87Q4 22 calls: $1.0mQ4 22 puts: $1.5mQ4 22P/C 1.49Q1 23 calls: $2.4mQ1 23 puts: $524.3kQ1 23P/C 0.22Q2 23 calls: $299.1kQ2 23 puts: $21.1kQ2 23P/C 0.07
Numbers
QuarterCallsPutsP/C
Q3 2022$972.0k$847.0k0.87
Q4 2022$1.0m$1.5m1.49
Q1 2023$2.4m$524.3k0.22
Q2 2023$299.1k$21.1k0.07

Biggest buyers

Nuveen Asset Management, LLC Added +280,130+280.1k
BlackRock Inc. Added +261,226+261.2k
PEREGRINE CAPITAL MANAGEMENT LLC New +244,074+244.1k
Granite Investment Partners, LLC Added +125,780+125.8k
CITADEL ADVISORS LLC Added +94,439+94.4k
DIMENSIONAL FUND ADVISORS LP Added +73,291+73.3k
Lisanti Capital Growth, LLC New +71,820+71.8k
Invesco Ltd. Added +65,225+65.2k
DekaBank Deutsche Girozentrale Added +60,000+60.0k
BANK OF AMERICA CORP /DE/ Added +54,424+54.4k

Biggest sellers

Capital Research Global Investors Sold out -1,361,917-1.4m
FMR LLC Reduced -769,634-769.6k
FRED ALGER MANAGEMENT, LLC Reduced -559,792-559.8k
WORLD EQUITY GROUP, INC. Sold out -119,840-119.8k
OSTERWEIS CAPITAL MANAGEMENT INC Sold out -89,900-89.9k
Summit Creek Advisors LLC Reduced -86,581-86.6k
Carnegie Investment Counsel Reduced -77,990-78.0k
Champlain Investment Partners, LLC Reduced -64,060-64.1k
FEDERATED HERMES, INC. Reduced -59,500-59.5k
SILVERCREST ASSET MANAGEMENT GROUP LLC Reduced -55,813-55.8k

Biggest calls

CITADEL ADVISORS LLC Reduced $299.1k7.1k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

CITADEL ADVISORS LLC Reduced $21.1k500 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.

HolderStakeChangeShares Last filed
FMR LLC 13G · institution new · filed 2026-09-08 12.7% new 4.5m≈ $90.2m 2026-09-08
BAMCO INC /NY/ 13G · institution -1.7 pts · filed 2025-11-14 6.1% -1.7 pts 2.2m≈ $43.7m 2025-11-14
NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 13G · institution new · filed 2026-08-14 6.0% new 2.1m≈ $42.4m 2026-08-14
GOLDMAN SACHS ASSET MANAGEMENT, L.P. 13G · institution new · filed 2026-05-11 5.0% new 1.8m≈ $36.9m 2026-05-11

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 Q2 2023

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)

BuyingSelling
404Q3 21: 0 buyingQ3 21: 0 sellingQ4 21: 1 buyingQ4 21: 4 sellingQ4 21Q1 22: 1 buyingQ1 22: 0 sellingQ2 22: 1 buyingQ2 22: 0 sellingQ2 22Q3 22: 0 buyingQ3 22: 0 sellingQ4 22: 0 buyingQ4 22: 0 sellingQ4 22Q1 23: 3 buyingQ1 23: 1 sellingQ2 23: 1 buyingQ2 23: 0 sellingQ2 23
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q3 20210—0——
Q4 20211$499.9k4$29.5m—
Q1 20221$1.0m0——
Q2 20221$999.9k0——
Q3 20220—0——
Q4 20220—0——
Q1 20233$1.2m1$15.0m—
Q2 20231$36.0k0——
DateInsiderTradeSharesPrice ValueTheir holding
2023-05-12 Field Janet Risi Director Bought 1,000 $36.05 $36.0k1.0k shares +8%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q2 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 BlackRock Inc. 0.00% of their portfolio New York, NY 2,446,7742.4m $103.1m $103.1m 0.00% Added +261.2k +261,226
2 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.04% of their portfolio NEW YORK, NY 2,255,4442.3m $80.5m $80.5m 0.04% Unchanged
3 FRED ALGER MANAGEMENT, LLC 0.40% of their portfolio NEW YORK, NY 1,865,3371.9m $78.6m $78.6m 0.40% Reduced -559.8k -559,792
4 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 1,486,8961.5m $62.6m $62.6m 0.00% Added +13.0k +12,954
5 Champlain Investment Partners, LLC 0.38% of their portfolio BURLINGTON, VT 1,459,1401.5m $61.5m $61.5m 0.38% Reduced -64.1k -64,060
6 FEDERATED HERMES, INC. 0.13% of their portfolio PITTSBURGH, PA 1,240,5001.2m $52.2m $52.2m 0.13% Reduced -59.5k -59,500
7 TRUIST FINANCIAL CORP 0.08% of their portfolio CHARLOTTE, NC 1,133,7301.1m $47.8m $47.8m 0.08% Reduced -10.1k -10,140
8 BLAIR WILLIAM & CO/IL 0.16% of their portfolio CHICAGO, IL 1,030,1291.0m $43.4m $43.4m 0.16% Added +27.4k +27,392
9 BAMCO INC /NY/ 0.12% of their portfolio NEW YORK, NY 1,009,8371.0m $42.5m $42.5m 0.12% Added +53.6k +53,650
10 Aperture Investors, LLC 4.12% of their portfolio New York, NY 795,155795.2k $33.5m $33.5m 4.12% Reduced -18.1k -18,130
11 Granite Investment Partners, LLC 1.13% of their portfolio EL SEGUNDO, CA 671,344671.3k $28.3m $28.3m 1.13% Added +125.8k +125,780
12 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 640,010640.0k $27.0m $27.0m 0.00% Added +54.4k +54,424
13 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 564,848564.8k $23.8m $23.8m 0.00% Added +25.1k +25,122
14 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 533,441533.4k $22.5m $22.5m 0.00% Added +25.9k +25,911
15 Stephens Investment Management Group LLC 0.35% of their portfolio LITTLE ROCK, AR 530,775530.8k $22.4m $22.4m 0.35% Added +19.9k +19,874
16 FMR LLC 0.00% of their portfolio BOSTON, MA 524,216524.2k $22.1m $22.1m 0.00% Reduced -769.6k -769,634
17 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 521,148521.1k $22.0m $22.0m 0.00% Added +42.4k +42,434
18 Invesco Ltd. 0.01% of their portfolio ATLANTA, GA 519,602519.6k $21.9m $21.9m 0.01% Added +65.2k +65,225
19 WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.07% of their portfolio CHICAGO, IL 487,455487.5k $20.5m $20.5m 0.07% Added +5.1k +5,119
20 EMERALD ADVISERS, LLC 0.88% of their portfolio LEOLA, PA 478,592478.6k $20.2m $20.2m 0.88% Added +6.4k +6,352
21 EMERALD MUTUAL FUND ADVISERS TRUST 0.96% of their portfolio LEOLA, PA 419,812419.8k $17.7m $17.7m 0.96% Added +18.1k +18,081
22 Nuveen Asset Management, LLC 0.01% of their portfolio CHICAGO, IL 379,510379.5k $16.0m $16.0m 0.01% Added +280.1k +280,130
23 Driehaus Capital Management LLC 0.19% of their portfolio Chicago, IL 362,450362.4k $15.3m $15.3m 0.19% Added +13.1k +13,093
24 JANUS HENDERSON GROUP PLC 0.01% of their portfolio LONDON, X0 361,369361.4k $15.2m $15.2m 0.01% Reduced -22 -22
25 FIRST TRUST ADVISORS LP 0.02% of their portfolio Wheaton, IL 340,112340.1k $14.3m $14.3m 0.02% Reduced -43.5k -43,530
26 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 332,213332.2k $14.0m $14.0m 0.00% Added +73.3k +73,291
27 DekaBank Deutsche Girozentrale 0.03% of their portfolio FRANKFURT, 2M 330,800330.8k $13.6m $13.6m 0.03% Added +60.0k +60,000
28 SANDLER CAPITAL MANAGEMENT 1.27% of their portfolio NEW YORK, NY 246,132246.1k $10.4m $10.4m 1.27% Reduced -21.2k -21,171
29 PEREGRINE CAPITAL MANAGEMENT LLC 0.28% of their portfolio MINNEAPOLIS, MN 244,074244.1k $10.3m $10.3m 0.28% New
30 Cercano Management LLC 0.34% of their portfolio BELLEVUE, WA 235,254235.3k $9.9m $9.9m 0.34% Unchanged
31 PUTNAM INVESTMENTS LLC 0.01% of their portfolio BOSTON, MA 209,447209.4k $8.8m $8.8m 0.01% Reduced -4.3k -4,320
32 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 206,907206.9k $8.7m $8.7m 0.00% Added +3.7k +3,680
33 Summit Creek Advisors LLC 1.00% of their portfolio MINNEAPOLIS, MN 190,697190.7k $8.0m $8.0m 1.00% Reduced -86.6k -86,581
34 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 176,330176.3k $7.4m $7.4m 0.00% Reduced -11.9k -11,886
35 SILVERCREST ASSET MANAGEMENT GROUP LLC 0.05% of their portfolio NEW YORK, NY 165,628165.6k $7.0m $7.0m 0.05% Reduced -55.8k -55,813
36 Fisher Asset Management, LLC 0.00% of their portfolio PLANO, TX 151,079151.1k $6.4m $6.4m 0.00% Reduced -7.1k -7,111
37 CITADEL ADVISORS LLC 0.01% of their portfolio MIAMI, FL 133,772133.8k $5.6m $5.6m 0.01% Added +94.4k +94,439
38 SEGALL BRYANT & HAMILL, LLC 0.06% of their portfolio CHICAGO, IL 132,810132.8k $5.6m $5.6m 0.06% Added +629 +629
39 Avalon Trust Co 0.49% of their portfolio SANTA FE, NM 129,150129.2k $5.4m $5.4m 0.49% Added +1.8k +1,775
40 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 110,352110.4k $4.6m $4.6m 0.00% Added +4.4k +4,405
41 ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio Berwyn, PA 98,68898.7k $4.2m $4.2m 0.00% Reduced -18.2k -18,162
42 Candriam S.C.A. 0.03% of their portfolio STRASSEN, N4 82,22182.2k $3.5m $3.5m 0.03% Unchanged
43 RICE HALL JAMES & ASSOCIATES, LLC 0.18% of their portfolio San Diego, CA 76,43276.4k $3.2m $3.2m 0.18% Reduced -9.4k -9,422
44 Lisanti Capital Growth, LLC 0.42% of their portfolio NEW YORK, NY 71,82071.8k $3.0m $3.0m 0.42% New
45 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 71,11171.1k $3.0m $3.0m 0.00% Added +38.5k +38,468
46 UBS Group AG 0.00% of their portfolio ZURICH, V8 68,87268.9k $2.9m $2.9m 0.00% Added +3.9k +3,884
47 STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio MADISON, WI 68,15568.2k $2.9m $2.9m 0.01% Reduced -250 -250
48 MARSHALL WACE, LLP 0.01% of their portfolio LONDON, X0 68,10368.1k $2.9m $2.9m 0.01% Reduced -19.5k -19,513
49 Swiss National Bank 0.00% of their portfolio ZURICH, V8 61,80061.8k $2.6m $2.6m 0.00% Added +10.5k +10,500
50 VAN ECK ASSOCIATES CORP 0.01% of their portfolio NEW YORK, NY 54,25954.3k $2.3m $2.3m 0.01% Reduced -8.5k -8,528
51 MACQUARIE GROUP LTD 0.00% of their portfolio Sydney, NSW 2000, C3 53,96354.0k $2.3m $2.3m 0.00% New
52 Creative Planning 0.00% of their portfolio OVERLAND PARK, KS 52,92452.9k $2.2m $2.2m 0.00% Added +815 +815
53 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 51,84151.8k $2.2m $2.2m 0.00% Added +4.7k +4,702
54 CREDIT SUISSE AG/ 0.00% of their portfolio ZURICH, V8 49,12949.1k $2.1m $2.1m 0.00% Added +21.3k +21,286
55 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 46,15346.2k $1.9m $1.9m 0.00% Added +9.4k +9,441
56 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 42,61642.6k $1.8m $1.8m 0.00% Added +27.3k +27,316
57 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 41,06741.1k $1.7m $1.7m 0.00% Added +4.9k +4,935
58 Naviter Wealth, LLC 0.37% of their portfolio LITTLE ROCK, AR 34,56834.6k $1.5m $1.5m 0.37% Unchanged
59 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 34,26534.3k $1.4m $1.4m 0.00% Added +3.2k +3,171
60 Conestoga Capital Advisors, LLC 0.02% of their portfolio WAYNE, PA 33,03533.0k $1.4m $1.4m 0.02% Unchanged
61 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 32,31932.3k $1.4m $1.4m 0.00% Added +13.8k +13,778
62 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 32,23732.2k $1.4m $1.4m 0.00% Added +6.3k +6,288
63 Caprock Group, LLC 0.10% of their portfolio BOISE, ID 32,21932.2k $1.4m $1.4m 0.10% Unchanged
64 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 30,91330.9k $1.3m $1.3m 0.00% Reduced -756 -756
65 Carnegie Investment Counsel 0.05% of their portfolio PEPPER PIKE, OH 29,72029.7k $1.3m $1.3m 0.05% Reduced -78.0k -77,990
66 Horrell Capital Management, Inc. 0.38% of their portfolio LITTLE ROCK, AR 29,51829.5k $1.2m $1.2m 0.38% Added +4 +4
67 ExodusPoint Capital Management, LP 0.01% of their portfolio NEW YORK, NY 28,69728.7k $1.2m $1.2m 0.01% Added +7.7k +7,675
68 OPPENHEIMER ASSET MANAGEMENT INC. 0.02% of their portfolio NEW YORK, NY 25,27425.3k $1.1m $1.1m 0.02% Reduced -6.4k -6,379
69 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 24,40024.4k $1.0m $1.0m 0.00% Unchanged
70 OCCUDO QUANTITATIVE STRATEGIES LP 0.10% of their portfolio FORT LAUDERDALE, FL 23,48223.5k $989.1k $989.1k 0.10% New
71 Legal & General Group Plc 0.00% of their portfolio London, X0 23,38923.4k $985.1k $985.1k 0.00% Added +13.0k +12,991
72 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 22,82022.8k $961.1k $961.1k 0.00% Reduced -4.5k -4,515
73 Trexquant Investment LP 0.02% of their portfolio STAMFORD, CT 22,01122.0k $927.1k $927.1k 0.02% New
74 CAPTRUST FINANCIAL ADVISORS 0.00% of their portfolio RALEIGH, NC 21,50321.5k $905.7k $905.7k 0.00% New
75 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 20,43020.4k $860.5k $860.5k 0.00% New
76 NATIXIS ADVISORS, LLC 0.00% of their portfolio Boston, MA 20,42120.4k $860.0k $860.0k 0.00% Added +3.7k +3,724
77 Artemis Investment Management LLP 0.01% of their portfolio EDINBURGH, X0 20,06320.1k $844.3k $844.3k 0.01% Reduced -1.4k -1,367
78 OneDigital Investment Advisors LLC 0.02% of their portfolio OVERLAND PARK, KS 19,18819.2k $808.2k $808.2k 0.02% Unchanged
79 DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main 0.00% of their portfolio FRANKFURT AM MAIN, 2M 19,09119.1k $804.1k $804.1k 0.00% Added +18.6k +18,610
80 FDx Advisors, Inc. 0.04% of their portfolio BERWYN, PA 18,06918.1k $761.0k $761.0k 0.04% Added +12.8k +12,782
81 Keebeck Wealth Management 0.10% of their portfolio Chicago, IL 17,91517.9k $754.6k $754.6k 0.10% Added +10.0k +10,042
82 MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC 0.01% of their portfolio New York, NY 17,05017.1k $718.1k $718.1k 0.01% New
83 COMERICA BANK 0.00% of their portfolio DALLAS, TX 16,75216.8k $3 $3 0.00% First filing
84 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 15,30815.3k $644.8k $644.8k 0.00% Reduced -2.0k -1,967
85 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 14,81314.8k $623.9k $623.9k 0.00% Reduced -754 -754
86 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 14,70614.7k $619.4k $619.4k 0.00% Added +537 +537
87 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 14,70214.7k $619.2k $619.2k 0.00% Reduced -3.7k -3,677
88 Cladis Investment Advisory, LLC 0.28% of their portfolio BILLINGS, MT 14,50014.5k $610.7k $610.7k 0.28% Unchanged
89 AMERICAN INTERNATIONAL GROUP, INC. 0.00% of their portfolio New York, NY 13,43613.4k $565.9k $565.9k 0.00% Added +179 +179
90 STIFEL FINANCIAL CORP 0.00% of their portfolio ST. LOUIS, MO 12,97413.0k $546.5k $546.5k 0.00% Reduced -2.6k -2,609
91 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 12,64312.6k $532.5k $532.5k 0.00% Added +6.3k +6,312
92 Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio SEOUL, M5 11,83311.8k $498.4k $498.4k 0.00% Unchanged
93 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 11,40611.4k $480.4k $480.4k 0.00% Added +234 +234
94 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 11,05211.1k $465.5k $465.5k 0.00% Added +435 +435
95 Kozak & Associates, Inc. 0.19% of their portfolio HIGHLANDS RANCH, CO 11,00011.0k $474.6k $474.6k 0.19% Unchanged
96 Yarbrough Capital, LLC 0.03% of their portfolio FRANKLIN, TN 10,96011.0k $461.6k $461.6k 0.03% Unchanged
97 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 10,22210.2k $430.6k $430.6k 0.00% Added +8.6k +8,599
98 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 10,08710.1k $424.9k $424.9k 0.00% Reduced -1.9k -1,931
99 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 9,7719.8k $412.0k $412.0k 0.00% New
100 BESSEMER GROUP INC 0.00% of their portfolio WOODBRIDGE, NJ 9,4159.4k $397.0k $397.0k 0.00% Added +9.4k +9,372