DF DENT & CO INC's Q1 2026 13F is in
Form 13F-HR for the quarter ended Mar 31, 2026 · filed May 15, 2026 · 262 reported positions · accession 0000934999-26-000002
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
| Activity | Security | Weight before | Weight now | Change | Shares | Shares % |
|---|---|---|---|---|---|---|
| Increased | BROADCOM INC (AVGO) | 0.0% | 1.2% | +1.2 pts | +194K sh | +12650% |
| Reduced | VERALTO CORP (VLTO) | 1.6% | 0.9% | −0.7 pts | −615K sh | −54% |
| Reduced | VULCAN MATERIALS CO (VMC) | 3.0% | 2.8% | −0.2 pts | −197K sh | −27% |
| Reduced | ECOLAB INC (ECL) | 2.7% | 2.6% | 0.0 pts | −191K sh | −27% |
| Reduced | WEST PHARMACEUTICALS, INC. (WST) | 1.3% | 0.6% | −0.7 pts | −199K sh | −62% |
| Reduced | HEICO CORP CL A (HEIA) | 3.6% | 3.1% | −0.4 pts | −211K sh | −21% |
| Reduced | MONOLITHIC PWR SYS INC COM (MPWR) | 1.7% | 1.9% | +0.2 pts | −38,728 sh | −30% |
| Reduced | THERMO FISHER SCIENTIFIC INC (TMO) | 1.5% | 0.9% | −0.6 pts | −86,043 sh | −48% |
| Reduced | S & P GLOBAL INC (SPGI) | 1.8% | 1.2% | −0.6 pts | −89,265 sh | −37% |
| Reduced | INTUIT INC. (INTU) | 0.9% | 0.1% | −0.8 pts | −82,799 sh | −91% |
| Increased | PERIMETER SOLUTIONS INC (PRM) | 1.0% | 1.8% | +0.8 pts | +1.4M sh | +55% |
| Reduced | TRANSDIGM GROUP INC (TDG) | 2.9% | 2.7% | −0.1 pts | −26,995 sh | −18% |
| Reduced | WASTE CONNECTIONS INC (WCN) | 2.6% | 2.7% | 0.0 pts | −181K sh | −17% |
| Reduced | BIO-TECHNE CORP (TECH) | 2.2% | 2.0% | −0.1 pts | −549K sh | −21% |
| Reduced | OLD DOMINION FGHT LINES INC CO (ODFL) | 0.7% | 0.6% | −0.1 pts | −145K sh | −46% |
| Reduced | CBRE GROUP INC (CBRE) | 2.0% | 1.7% | −0.3 pts | −203K sh | −24% |
| Increased | GUIDEWIRE SOFTWARE INC (GWRE) | 1.3% | 1.8% | +0.5 pts | +165K sh | +37% |
| Reduced | MOODYS CORP (MCO) | 2.6% | 2.5% | −0.1 pts | −56,527 sh | −16% |
| Reduced | VEEVA SYSTEMS, INC. (VEEV) | 1.9% | 1.6% | −0.4 pts | −134K sh | −22% |
| Increased | AMPHENOL CORP NEW CL A (APH) | 0.1% | 0.5% | +0.5 pts | +184K sh | +627% |
| Reduced | KINSALE CAPITAL GROUP INC. (KNSL) | 1.8% | 1.6% | −0.1 pts | −66,819 sh | −21% |
| New | SAIA INC (SAIA) | — | 0.4% | +0.4 pts | +64,817 sh | new |
| Reduced | CADENCE DESIGN SYSTEMS INC. (CDNS) | 1.6% | 1.5% | −0.1 pts | −70,709 sh | −20% |
| Reduced | ALPHABET INC CL C (GOOG) | 3.7% | 4.2% | +0.4 pts | −68,112 sh | −8% |
| Reduced | PTC INC (PTC) | 0.8% | 0.5% | −0.3 pts | −126K sh | −41% |
| Reduced | ENTEGRIS INC (ENTG) | 0.4% | 0.3% | 0.0 pts | −152K sh | −52% |
| Reduced | VISA INC CL A (V) | 3.4% | 3.6% | +0.2 pts | −54,986 sh | −8% |
| Reduced | AMAZON.COM INC (AMZN) | 2.9% | 3.2% | +0.3 pts | −78,248 sh | −9% |
| Reduced | PROCORE TECHNOLOGIES INC (PCOR) | 1.2% | 0.9% | −0.3 pts | −286K sh | −25% |
| Increased | MOTOROLA SOLUTIONS INC. (MSI) | 0.5% | 1.1% | +0.6 pts | +37,416 sh | +41% |
| Reduced | COSTAR GROUP INC (CSGP) | 1.9% | 1.2% | −0.7 pts | −402K sh | −20% |
| Reduced | SITEONE LANDSCAPE SUPPLY, INC. (SITE) | 0.6% | 0.6% | 0.0 pts | −120K sh | −34% |
| Reduced | MASTERCARD INC CL A (MA) | 2.6% | 2.7% | +0.1 pts | −31,143 sh | −10% |
| Increased | NETFLIX INC (NFLX) | 0.5% | 1.0% | +0.5 pts | +161K sh | +44% |
| Reduced | REPLIGEN CORPORATION (RGEN) | 1.2% | 0.8% | −0.3 pts | −130K sh | −26% |
| Reduced | MARKEL GROUP INC (MKL) | 1.1% | 1.0% | −0.1 pts | −7,798 sh | −23% |
| New | VSE CORP (VSEC) | — | 0.3% | +0.3 pts | +77,243 sh | new |
| Reduced | METTLER TOLEDO INTL (MTD) | 0.6% | 0.5% | −0.1 pts | −11,271 sh | −36% |
| Exited | MASIMO CORP COM (MASI) | 0.3% | — | −0.3 pts | −143K sh | −100% |
| Reduced | INTUITIVE SURGICAL INC (ISRG) | 2.5% | 2.4% | −0.1 pts | −30,078 sh | −10% |
| Reduced | VERISK ANALYTICS INC (VRSK) | 0.6% | 0.4% | −0.2 pts | −72,646 sh | −40% |
| Reduced | ASML HOLDINGS N.V. (ASML) | 1.1% | 1.5% | +0.4 pts | −10,365 sh | −15% |
| Exited | SPS COMMERCE INC (SPSC) | 0.3% | — | −0.3 pts | −203K sh | −100% |
| Reduced | APPFOLIO, INC (APPF) | 1.3% | 1.0% | −0.4 pts | −80,982 sh | −20% |
| Reduced | DOUGLAS DYNAMICS INC (PLOW) | 0.3% | 0.2% | −0.1 pts | −293K sh | −54% |
| Reduced | THE DESCARTES SYSTEMS GROUP IN (DSGX) | 0.4% | 0.3% | −0.2 pts | −169K sh | −48% |
| Reduced | RBC BEARINGS INC (RBC) | 0.6% | 0.8% | +0.1 pts | −22,107 sh | −23% |
| Reduced | HAMILTON LANE INC (HLNE) | 0.5% | 0.3% | −0.2 pts | −119K sh | −43% |
| New | PDF SOLUTIONS INC (PDFS) | — | 0.2% | +0.2 pts | +353K sh | new |
| Reduced | GOOSEHEAD INSURANCE, INC. (GSHD) | 1.1% | 0.6% | −0.5 pts | −261K sh | −25% |
The 50 largest of 230 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 — 30.1% of the equity book
No changes in the top 10 this quarter
| # | Security | Weight before | Weight now | |
|---|---|---|---|---|
| 1 | ALPHABET INC CL C (GOOG) | 3.7% | 4.2% | |
| 2 | VISA INC CL A (V) | 3.4% | 3.6% | |
| 3 | AMAZON.COM INC (AMZN) | 2.9% | 3.2% | |
| 4 | HEICO CORP CL A (HEIA) | 3.6% | 3.1% | |
| 5 | VULCAN MATERIALS CO (VMC) | 3.0% | 2.8% | |
| 6 | MASTERCARD INC CL A (MA) | 2.6% | 2.7% | |
| 7 | TRANSDIGM GROUP INC (TDG) | 2.9% | 2.7% | |
| 8 | WASTE CONNECTIONS INC (WCN) | 2.6% | 2.7% | |
| 9 | ECOLAB INC (ECL) | 2.7% | 2.6% | |
| 10 | MOODYS CORP (MCO) | 2.6% | 2.5% |
Weights are each position's reported value as a share of the fund's reported equity positions (options and principal-amount holdings excluded).