Gamco Investors, Inc. Et Al
· Added
+$19M
Change
+964K
Date
Q1 2026
MN
13F filing season in progress; institutional ownership uses the last closed quarter (2026 Q1)
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Gamco Investors, Inc. Et Al
· Added
+$19M
Change
+964K
Date
Q1 2026
|
Gamco Investors, Inc. Et Al | Added· Q1 2026 | +$19M | +964K | – | Q1 2026 | |||||
|
Mufg Securities Emea PLC
· Added
+$8.2M
Change
+423K
Date
Q1 2026
|
Mufg Securities Emea PLC | Added· Q1 2026 | +$8.2M | +423K | – | Q1 2026 | |||||
|
Bastion Asset Management Inc.
· New
+$6.0M
Change
+306K
Date
Q1 2026
|
Bastion Asset Management Inc. | New· Q1 2026 | +$6.0M | +306K | – | Q1 2026 | |||||
|
Arrowstreet Capital, Limited Partnership
· Added
+$5.5M
Change
+284K
Date
Q1 2026
|
Arrowstreet Capital, Limited Partnership | Added· Q1 2026 | +$5.5M | +284K | – | Q1 2026 | |||||
|
Russell Investments Group, Ltd.
· Added
+$4.8M
Change
+248K
Date
Q1 2026
|
Russell Investments Group, Ltd. | Added· Q1 2026 | +$4.8M | +248K | – | Q1 2026 | |||||
|
Nuveen, LLC
· Added
+$4.7M
Change
+244K
Date
Q1 2026
|
Nuveen, LLC | Added· Q1 2026 | +$4.7M | +244K | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
+$4.6M
Change
+238K
Δ Own
+177.1%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | +$4.6M | +238K | +177.1% | Q1 2026 | |||||
|
Deprince Race & Zollo Inc
· New
+$3.7M
Change
+192K
Date
Q1 2026
|
Deprince Race & Zollo Inc | New· Q1 2026 | +$3.7M | +192K | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· New
+$3.5M
Change
+182K
Date
Q1 2026
|
Marshall Wace, LLP | New· Q1 2026 | +$3.5M | +182K | – | Q1 2026 | |||||
|
Gabelli Funds LLC
· Added
+$3.4M
Change
+176K
Date
Q1 2026
|
Gabelli Funds LLC | Added· Q1 2026 | +$3.4M | +176K | – | Q1 2026 | |||||
|
Ancora Advisors LLC
· Added
+$3.3M
Change
+171K
Date
Q1 2026
|
Ancora Advisors LLC | Added· Q1 2026 | +$3.3M | +171K | – | Q1 2026 | |||||
|
Allianz Asset Management GMBH
· Added
+$3.3M
Change
+170K
Date
Q1 2026
|
Allianz Asset Management GMBH | Added· Q1 2026 | +$3.3M | +170K | – | Q1 2026 | |||||
|
Xtx Topco Ltd
· New
+$3.3M
Change
+168K
Date
Q1 2026
|
Xtx Topco Ltd | New· Q1 2026 | +$3.3M | +168K | – | Q1 2026 | |||||
|
AQR Capital Management LLC
· Added
+$3.2M
Change
+163K
Date
Q1 2026
|
AQR Capital Management LLC | Added· Q1 2026 | +$3.2M | +163K | – | Q1 2026 | |||||
|
Citadel Advisors LLC
· New
+$3.0M
Change
+155K
Date
Q1 2026
|
Citadel Advisors LLC | New· Q1 2026 | +$3.0M | +155K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
D'Ambrosia Brian
· Officer
Tax withholding or exercise payment (F)
-459
|
D'Ambrosia Brian | Officer | Tax withholding or exercise payment (F) | – | -459 | – | 86K | −0.5% | Jun 19, 2026 | Jun 23, 2026 | |||||||||
|
Mulholland Maureen
· Officer
Tax withholding or exercise payment (F)
-393
|
Mulholland Maureen | Officer | Tax withholding or exercise payment (F) | – | -393 | – | 57K | −0.7% | Jun 19, 2026 | Jun 23, 2026 | |||||||||
|
Hawryschuk Nicholas P.
· Officer
Tax withholding or exercise payment (F)
-132
|
Hawryschuk Nicholas P. | Officer | Tax withholding or exercise payment (F) | – | -132 | – | 38K | −0.3% | Jun 19, 2026 | Jun 23, 2026 | |||||||||
|
Donovan Cindy
· Officer
Tax withholding or exercise payment (F)
-175
|
Donovan Cindy | Officer | Tax withholding or exercise payment (F) | – | -175 | – | 26K | −0.7% | Jun 19, 2026 | Jun 23, 2026 | |||||||||
|
Solomon Peter J.
· Director
2 operations
-20K
|
Solomon Peter J. | Director | 2 operations | – | -20K | – | 0 | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Solomon Peter J.
· Director
2 operations
1.2M
|
Solomon Peter J. | Director | 2 operations | – | 1.2M | – | 679K | – | Jun 18, 2026 | Jun 23, 2026 | |||||||||
|
Chang Kathryn M.
· Officer
Tax withholding or exercise payment (F)
-637
|
Chang Kathryn M. | Officer | Tax withholding or exercise payment (F) | – | -637 | – | 8K | −7.1% | Jun 13, 2026 | Jun 23, 2026 | |||||||||
|
D'Ambrosia Brian
· Officer
Tax withholding or exercise payment (F)
-3K
|
D'Ambrosia Brian | Officer | Tax withholding or exercise payment (F) | – | -3K | – | 86K | −2.9% | Jun 13, 2026 | Jun 23, 2026 | |||||||||
|
Mulholland Maureen
· Officer
Tax withholding or exercise payment (F)
-2K
|
Mulholland Maureen | Officer | Tax withholding or exercise payment (F) | – | -2K | – | 57K | −3.2% | Jun 13, 2026 | Jun 23, 2026 | |||||||||
|
Hawryschuk Nicholas P.
· Officer
Tax withholding or exercise payment (F)
-1K
|
Hawryschuk Nicholas P. | Officer | Tax withholding or exercise payment (F) | – | -1K | – | 39K | −3.2% | Jun 13, 2026 | Jun 23, 2026 | |||||||||
|
Donovan Cindy
· Officer
Tax withholding or exercise payment (F)
-637
|
Donovan Cindy | Officer | Tax withholding or exercise payment (F) | – | -637 | – | 26K | −2.4% | Jun 13, 2026 | Jun 23, 2026 | |||||||||
|
Hawryschuk Nicholas P.
· Officer
2 operations
18K
|
Hawryschuk Nicholas P. | Officer | 2 operations | – | 18K | – | 40K | – | May 21, 2026 | May 26, 2026 | |||||||||
|
D'Ambrosia Brian
· Officer
2 operations
36K
|
D'Ambrosia Brian | Officer | 2 operations | – | 36K | – | 89K | – | May 21, 2026 | May 26, 2026 | |||||||||
|
Donovan Cindy
· Officer
2 operations
9K
|
Donovan Cindy | Officer | 2 operations | – | 9K | – | 27K | – | May 21, 2026 | May 26, 2026 | |||||||||
|
Chang Kathryn M.
· Officer
2 operations
9K
|
Chang Kathryn M. | Officer | 2 operations | – | 9K | – | 9K | – | May 21, 2026 | May 26, 2026 | |||||||||
N
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180 reporting institutions disclosed MNRO position changes in the Q1 2026 snapshot. The largest disclosed owners include Icahn Carl C, Gamco Investors, Inc. Et Al, Adage Capital Partners Gp, L.L.C.. WhoBought does not publish a total institutional-ownership percentage for MNRO: aggregate 13F filings can report the same shares more than once (a parent manager and its subsidiary filers, or shares out on loan), so a summed percentage would overstate what institutions really hold.
For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.
An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.
Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.
Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.
A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.