DF DENT & CO INC

Long Only Manager • Growth

DF DENT & CO INC is a Long Only Manager specializing in Growth based in Baltimore, MD led by Daniel Forbes Dent, reporting $8.6B in AUM as of Q3 2025 with HEI.A as the largest holding (4% allocation).

ChairmanDaniel Forbes Dent

Portfolio Value: $7.7B
Positions: 268
Top Holding: HEI.A at 3.69%
Last Reported: Q3 2025

Address400 East Pratt Street, 7th Floor, Baltimore, MD, 21202-3127, United States

Top Holdings

Largest long holdings in DF DENT & CO INC's portfolio (29.4% of total portfolio)

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GthenH

Holding	Sector	Position	Weight	Traded	Ownership	Owned Since
1 Heico Corporation HEI.A	Aerospace & Defense Industrials	$285.6M	3.69%	-$25.3M Sold	0.81% 1.1M shares	Q4 2019 Held for 5y 11m
2 Vulcan Materials Company VMC	Construction Materials Basic Materials	$257.2M	3.32%	-$13.4M Sold	0.63% 836.3K shares	Q1 2018 Held for 7y 8m
3 Visa V	Financial - Credit Services Financial Services	$255.8M	3.31%	-$7.9M Sold	0.04% 749.4K shares	≤ Q2 2013 Held for 12y 5m+
4 Alphabet Inc. GOOG	Internet Content & Information Communication Services	$225.1M	2.91%	-$33.5M Sold	0.01% 924.4K shares	Q1 2014 Held for 11y 8m
5 TransDigm Group TDG	Aerospace & Defense Industrials	$219.2M	2.83%	+$622.1K Bought	0.30% 166.3K shares	Q2 2015 Held for 10y 5m
6 Ecolab ECL	Chemicals - Specialty Basic Materials	$215.6M	2.79%	-$9.5M Sold	0.28% 787.3K shares	≤ Q2 2013 Held for 12y 5m+
7 Amazon AMZN	Specialty Retail Consumer Cyclical	$214.1M	2.77%	-$6.8M Sold	0.01% 974.9K shares	Q3 2014 Held for 11y 2m
8 Mastercard MA	Financial - Credit Services Financial Services	$209.6M	2.71%	-$8.4M Sold	0.04% 368.5K shares	≤ Q2 2013 Held for 12y 5m+
9 Waste Connections WCN	Waste Management Industrials	$204.4M	2.64%	-$10.3M Sold	0.45% 1.2M shares	≤ Q2 2013 Held for 12y 5m+
10 Moody's MCO	Financial - Data & Stock Exchanges Financial Services	$191.2M	2.47%	-$12.9M Sold	0.22% 401.2K shares	Q3 2013 Held for 12y 2m

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GthenH

Changes

Portfolio activity, position movements, and quarter-over-quarter changes in DF DENT & CO INC's latest filing

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GthenC

Market Value

$7.7B

Prior: $7.9B

Q/Q Change

-1.77%

-$139.7M

Net Flows % of MV

-4.43%

Turnover Ratio

9.43%

New Purchases

21 stocks

$125.3M

Added To

82 stocks

+$407.4M

Sold Out Of

12 stocks

$338.8M

Reduced Holdings

100 stocks

-$537.0M

Increased Positions

Position	Shares Δ	Change
1 Synopsys SNPS	New	0 → 140.0K +$69.1M
2 Badger Meter BMI	New	0 → 128.0K +$22.9M
3 Onto Innovation ONTO	New	0 → 80.4K +$10.4M
4 Pan American Silver PAAS	New	0 → 159.2K +$6.2M
5 The Ensign Group ENSG	New	0 → 25.1K +$4.3M

Decreased Positions

Position	Shares Δ	Change
1 Ansys ANSS	Sold	577.9K → 0 −$203.0M
2 WNS Holdings Limited WNS	Sold	884.2K → 0 −$55.9M
3 CarMax KMX	Sold	513.6K → 0 −$34.5M
4 WD-40 Company WDFC	Sold	64.4K → 0 −$14.7M
5 Trupanion TRUP	Sold	234.9K → 0 −$13.0M