DF DENT & CO INC's Q1 2025 13F is in

Form 13F-HR for the quarter ended Mar 31, 2025 · filed May 15, 2025 · 260 reported positions · accession 0000934999-25-000004

This filing covers a somewhat different set of reporting entities than the fund's prior filing, so a few of the changes below may reflect that rather than trading.

What changed this quarter

DF DENT & CO INC's changes in reported equity positions, Q1 2025
Activity Security Weight before Weight now Change Shares Shares %
Reduced GUIDEWIRE SOFTWARE INC (GWRE) 2.1% 1.6% −0.5 pts −341K sh −34%
Increased BOOZ ALLEN HAMILTON HOLDING CO (BAH) 0.0% 0.7% +0.7 pts +506K sh +8111%
Increased MANHATTAN ASSOCS INC COM (MANH) 0.8% 1.2% +0.5 pts +304K sh +137%
Reduced MARKEL GROUP INC (MKL) 1.8% 1.4% −0.4 pts −27,635 sh −33%
Reduced EDWARDS LIFESCIENCES (EW) 0.5% 0.0% −0.5 pts −518K sh −95%
New PTC INC (PTC) — 0.4% +0.4 pts +173K sh new
Reduced SITEONE LANDSCAPE SUPPLY, INC. (SITE) 1.1% 0.8% −0.4 pts −205K sh −31%
New MOTOROLA SOLUTIONS INC. (MSI) — 0.3% +0.3 pts +56,141 sh new
Reduced VEEVA SYSTEMS, INC. (VEEV) 2.2% 2.2% 0.0 pts −97,404 sh −12%
Increased CADENCE DESIGN SYS (CDNS) 1.2% 1.4% +0.1 pts +78,037 sh +24%
Reduced BIO-TECHNE CORP (TECH) 2.9% 2.3% −0.7 pts −320K sh −10%
Reduced S & P GLOBAL INC (SPGI) 2.2% 2.1% −0.1 pts −36,799 sh −10%
Reduced GOOSEHEAD INSURANCE, INC. (GSHD) 1.4% 1.4% 0.0 pts −139K sh −13%
Reduced ECOLAB INC (ECL) 2.6% 2.8% +0.2 pts −59,474 sh −7%
Exited WILLSCOT HLDGS CORP (WSC) 0.2% — −0.2 pts −359K sh −100%
Reduced INTUITIVE SURGICAL INC (ISRG) 2.4% 2.3% −0.1 pts −22,374 sh −6%
Reduced BLACKLINE INC (BL) 0.2% 0.0% −0.2 pts −219K sh −98%
Reduced VULCAN MATERIALS CO (VMC) 3.1% 2.9% −0.3 pts −44,205 sh −5%
Reduced TRANSDIGM GROUP INC (TDG) 2.8% 3.1% +0.3 pts −7,243 sh −4%
Reduced WNS HOLDINGS LTD (WNS) 0.6% 0.7% +0.1 pts −163K sh −16%
Reduced OLD DOMINION FGHT LINES INC CO (ODFL) 1.9% 1.7% −0.2 pts −60,415 sh −7%
Increased VERALTO CORP (VLTO) 2.2% 2.3% +0.2 pts +99,883 sh +6%
Increased FEDERAL SIGNAL CORP (FSS) 0.1% 0.2% +0.1 pts +130K sh +206%
Reduced WASTE CONNECTIONS INC (WCN) 2.8% 3.2% +0.4 pts −48,622 sh −4%
Increased WEST PHARMACEUTICALS, INC. (WST) 1.6% 1.3% −0.3 pts +42,202 sh +11%
Reduced FASTENAL CO (FAST) 2.1% 2.3% +0.2 pts −122K sh −5%
Increased ASML HOLDINGS (ASML) 0.6% 0.7% +0.1 pts +13,937 sh +20%
Increased UBER TECHNOLOGIES, INC. (UBER) 0.4% 0.6% +0.2 pts +122K sh +24%
Reduced VISA INC CL A (V) 3.2% 3.7% +0.4 pts −23,962 sh −3%
Reduced CBRE GROUP INC (CBRE) 1.9% 1.9% 0.0 pts −63,968 sh −6%
Increased SERVICENOW INC (NOW) 0.3% 0.4% 0.0 pts +10,468 sh +41%
Reduced MASTERCARD INC-CLASS A (MA) 2.7% 2.9% +0.2 pts −14,988 sh −4%
Reduced MOODYS CORP (MCO) 2.7% 2.7% 0.0 pts −16,046 sh −4%
Reduced ANSYS INC (ANSS) 2.6% 2.5% −0.1 pts −22,852 sh −4%
Reduced COSTAR GROUP INC (CSGP) 2.2% 2.5% +0.3 pts −89,418 sh −4%
Reduced VERISK ANALYTICS INC (VRSK) 1.3% 1.3% +0.1 pts −23,175 sh −6%
Reduced AMAZON.COM INC (AMZN) 2.9% 2.6% −0.3 pts −34,198 sh −3%
Reduced KINSALE CAPITAL GROUP INC. (KNSL) 1.4% 1.5% +0.1 pts −12,309 sh −5%
Increased CASELLA WASTE SYSTEMS INC CL A (CWST) 0.3% 0.4% +0.1 pts +51,315 sh +22%
Reduced NOVANTA INC COM NPV (NOVT) 0.4% 0.3% −0.1 pts −43,663 sh −22%
Increased SPS COMMERCE INC (SPSC) 0.3% 0.3% 0.0 pts +40,821 sh +33%
Reduced KADANT INC (KAI) 0.2% 0.2% −0.1 pts −16,006 sh −32%
Increased APPLIED INDL TECHNOLOGIES INC (AIT) 0.1% 0.1% +0.1 pts +22,177 sh +93%
Reduced DOUGLAS DYNAMICS INC (PLOW) 0.2% 0.2% −0.1 pts −215K sh −27%
Increased AGILYSYS INC (AGYS) 0.2% 0.2% 0.0 pts +67,976 sh +60%
Reduced APPFOLIO, INC (APPF) 1.3% 1.2% −0.1 pts −22,065 sh −5%
Reduced ALPHABET INC CLASS C (GOOG) 2.7% 2.3% −0.4 pts −30,108 sh −3%
Reduced CARMAX INC (KMX) 0.9% 0.9% −0.1 pts −57,643 sh −7%
New MCEWEN MNG INC COM (MUX) — 0.1% +0.1 pts +585K sh new
Reduced CROWDSTRIKE HOLDINGS, INC. (CRWD) 0.4% 0.4% 0.0 pts −11,858 sh −12%

The 50 largest of 224 changes, by size of the trade. Full holdings for this quarter.

Reported by the fund in its Form 13F filed with the SEC; holdings are as of the quarter-end report date and may have changed since. For informational purposes only — not investment advice or a recommendation to buy or sell any security. FilingExplorer is not affiliated with or endorsed by this fund. How this brief is compiled

Top 10 positions — 29.9% of the equity book

Changes in the top 10 this quarter: ECL entered · CSGP entered · TECH left · GOOG left

# Security Weight before Weight now
1 VISA INC CL A (V) 3.2% 3.7%
2 HEICO CORP CL A (HEIA) 2.9% 3.5%
3 WASTE CONNECTIONS INC (WCN) 2.8% 3.2%
4 TRANSDIGM GROUP INC (TDG) 2.8% 3.1%
5 VULCAN MATERIALS CO (VMC) 3.1% 2.9%
6 MASTERCARD INC-CLASS A (MA) 2.7% 2.9%
7 ECOLAB INC (ECL) 2.6% 2.8% Entered the top 10
8 MOODYS CORP (MCO) 2.7% 2.7%
9 AMAZON.COM INC (AMZN) 2.9% 2.6%
10 COSTAR GROUP INC (CSGP) 2.2% 2.5% Entered the top 10
— BIO-TECHNE CORP (TECH) 2.9% 2.3% Left the top 10
— ALPHABET INC CLASS C (GOOG) 2.7% 2.3% Left the top 10

Weights are each position's reported value as a share of the fund's reported equity positions (options and principal-amount holdings excluded).