Ticker · CUSIP 615111101

MEG

MONTROSE ENVIRONMENTAL GROUP

Industrials·Waste Management

···Share

Holders (tracked)

Combined shares

3,225,176

Combined value

$80.08M

Last close

$21.63

Quarter

2025Q4

Price is -12.9% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$21.63+7.04 (+48.25%)H $31.06 · L $14.09 · Avg Vol 395K

Position opened

Tracked holders · last 8 quarters

-1 vs previous quarter over the last 8.

SEC event timeline

18 events

Ken Griffin (Citadel Advisors) trimmed2026-02-17
−63,227 shares · 2025Q4
Position
D.E. Shaw & Co. opened position2026-02-17
+10,944 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−172,277 shares · 2025Q4
Position
Steve Cohen (Point72) exited2026-02-17
−49,800 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+1,167 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+168,699 shares · 2025Q4
Position
Ron Baron (Baron Capital / BAMCO) added2026-02-17
+136 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+45,016 shares · 2025Q4
Position
Renaissance Technologies exited2026-02-12
−10,300 shares · 2025Q4
Position
Ken Fisher (Fisher Asset Mgmt) added2026-02-09
+94,697 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2025-11-14
−549,884 shares · 2025Q3
Position
Steve Cohen (Point72) added2025-11-14
+11,941 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+1,499 shares · 2025Q3
Position
Ron Baron (Baron Capital / BAMCO) trimmed2025-11-14
−603,932 shares · 2025Q3
Position
Wellington Management exited2025-11-14
−271,341 shares · 2025Q3
Position
AQR Capital Management added2025-11-14
+70,155 shares · 2025Q3
Position
Renaissance Technologies opened position2025-11-13
+10,300 shares · 2025Q3
Position
Ken Fisher (Fisher Asset Mgmt) added2025-11-12
+39,331 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for MEG →

Follow-the-investor returns

If you'd copied each holder of MEG…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Ron Baron (Baron Capital / BAMCO)	2020Q3	$24.09	-10.2%	$46.7M
Izzy Englander (Millennium Mgmt)	2020Q3	$24.23	-10.7%	$1.5M
AQR Capital Management	2023Q4	$24.65	-12.2%	$4.7M
Ken Griffin (Citadel Advisors)	2020Q3	$25.46	-15.1%	$3.7M
Ken Griffin (Citadel Advisors)	2020Q3	$25.46	-15.1%	$3.7M
Paul Tudor Jones (Tudor Investment)	2021Q3	$25.99	-16.8%	$3.6M
D.E. Shaw & Co.	2020Q4	$26.69	-18.9%	$237K
Ken Fisher (Fisher Asset Mgmt)	2022Q3	$29.10	-25.7%	$7.6M
T. Rowe Price	2022Q4	$32.92	-34.3%	$558K

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions2

Paul Tudor Jones (Tudor Investment)
+168,699
$4.2M
D.E. Shaw & Co.
+10,944
$272K

Added to4

Ken Fisher (Fisher Asset Mgmt)
+94,697
$2.4M
AQR Capital Management
+45,016
$1.1M
Ron Baron (Baron Capital / BAMCO)
+136
$3K
T. Rowe Price
+1,167
$29

Trimmed2

Izzy Englander (Millennium Mgmt)
−172,277
$4.3M
Ken Griffin (Citadel Advisors)
−63,227
$1.6M

Exited2

Steve Cohen (Point72)
−49,800
$1.4M
Renaissance Technologies
−10,300
$283K

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	8	2,938,209	$155.5M	—
2022Q2	5	2,993,932	$101.1M	-3
2022Q3	6	2,997,085	$100.9M	+1
2022Q4	7	3,066,939	$136.1M	+1
2023Q1	7	3,415,858	$121.8M	—
2023Q2	8	3,801,449	$160.1M	+1
2023Q3	11	3,850,780	$112.7M	+3
2023Q4	13	3,977,623	$127.8M	+2
2024Q1	12	3,801,443	$148.9M	-1
2024Q2	10	4,041,463	$180.1M	-2
2024Q3	11	3,079,791	$81.0M	+1
2024Q4	8	4,243,578	$78.7M	-3
2025Q1	10	4,968,682	$70.9M	+2
2025Q2	9	4,454,362	$97.5M	-1
2025Q3	10	3,214,221	$88.3M	+1
2025Q4	9	3,225,176	$80.1M	-1

Who owns MEG

9 super-investors · 2025Q4

Tracked stake

3.23M

Combined value

$80M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New2Added4Trim3

#	Manager	Shares	Value	% of book	Last action
1	Ron Baron Baron Capital / BAMCO	2.16M	$54M	0.1%	Added+136
2	Ken Fisher Fisher Asset Mgmt	352.6K	$9M	0.0%	Added+94.7K
3	AQR Capital Management	215.7K	$5M	0.0%	Added+45.0K
4	Ken Griffin Citadel Advisors	172.8K	$4M	0.0%	Trim−63.2K
5	Paul Tudor Jones Tudor Investment	168.7K	$4M	0.0%	New+168.7K
6	Izzy Englander Millennium Mgmt	71.6K	$2M	0.0%	Trim−172.3K
7	Ken Griffin Citadel Advisors	46.5K	$1M	0.0%	Trim−63.2K
8	T. Rowe Price	25.8K	$641K	0.0%	Added+1.2K
9	D.E. Shaw & Co.	10.9K	$272K	0.0%	New+10.9K

Recent moves

20 transactions

TRIMIzzy Englander (Millennium Mgmt)
−172,277 · 2025Q4
ADDT. Rowe Price
+1,167 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+168,699 · 2025Q4
ADDAQR Capital Management
+45,016 · 2025Q4
SOLDSteve Cohen (Point72)
−49,800 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−63,227 · 2025Q4
NEWD.E. Shaw & Co.
+10,944 · 2025Q4
ADDRon Baron (Baron Capital / BAMCO)
+136 · 2025Q4
SOLDRenaissance Technologies
−10,300 · 2025Q4
ADDKen Fisher (Fisher Asset Mgmt)
+94,697 · 2025Q4
ADDAQR Capital Management
+70,155 · 2025Q3
TRIMIzzy Englander (Millennium Mgmt)
−549,884 · 2025Q3
ADDT. Rowe Price
+1,499 · 2025Q3
ADDSteve Cohen (Point72)
+11,941 · 2025Q3
SOLDWellington Management
−271,341 · 2025Q3
TRIMRon Baron (Baron Capital / BAMCO)
−603,932 · 2025Q3
NEWRenaissance Technologies
+10,300 · 2025Q3
ADDKen Fisher (Fisher Asset Mgmt)
+39,331 · 2025Q3
ADDT. Rowe Price
+2,143 · 2025Q2
TRIMSteve Cohen (Point72)
−9,862 · 2025Q2

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