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DF DENT & CO INC
Period ended Jun 30, 2026 · Latest filing Aug 14, 2026
These quarterly holdings are delayed and may not include all assets or short positions.
Values are from the reporting date, not current prices or purchase costs.
The same security may appear in multiple rows.
Source: SEC
Reported portfolio value
Quarter-end reported holdings; not current value or investment performance.
View reported values
- Jun 30, 2026: $5,271,504,691
More quarters will appear as history becomes available.
Top holdings
Top 10 at Jun 30, 2026. Matching entries are combined; security classes and options remain separate. Shares exclude principal amounts; option shares reflect the reported underlying amount.
View top holdings values
- ALPHABET INC CL C · COM · 02079k107 · shares: $240,080,854
- VISA INC CL A · COM · 92826c839 · shares: $190,103,271
- HEICO CORP CL A · COM · 422806208 · shares: $180,324,569
- AMAZON.COM INC · COM · 023135106 · shares: $165,107,413
- TRANSDIGM GROUP INC · COM · 893641100 · shares: $149,110,271
- VULCAN MATERIALS CO · COM · 929160109 · shares: $144,617,574
- ECOLAB INC · COM · 278865100 · shares: $130,325,570
- WASTE CONNECTIONS INC · COM · 94106b101 · shares: $128,280,039
- MASTERCARD INC CL A · COM · 57636q104 · shares: $126,604,468
- FASTENAL CO · COM · 311900104 · shares: $123,792,998
Reported holdings
271 reported entries| Issuer | Class | CUSIP | Type | Shares / principal | Reported value (USD) |
|---|---|---|---|---|---|
| ALPHABET INC CL C | COM | 02079k107 | — | 679,481 shares | $240,080,854 |
| VISA INC CL A | COM | 92826c839 | — | 554,092 shares | $190,103,271 |
| HEICO CORP CL A | COM | 422806208 | — | 699,176 shares | $180,324,569 |
| AMAZON.COM INC | COM | 023135106 | — | 692,739 shares | $165,107,413 |
| TRANSDIGM GROUP INC | COM | 893641100 | — | 111,941 shares | $149,110,271 |
| VULCAN MATERIALS CO | COM | 929160109 | — | 490,212 shares | $144,617,574 |
| ECOLAB INC | COM | 278865100 | — | 467,771 shares | $130,325,570 |
| WASTE CONNECTIONS INC | COM | 94106b101 | — | 769,572 shares | $128,280,039 |
| MASTERCARD INC CL A | COM | 57636q104 | — | 246,504 shares | $126,604,468 |
| FASTENAL CO | COM | 311900104 | — | 2,577,410 shares | $123,792,998 |
| MOODYS CORP | COM | 615369105 | — | 269,427 shares | $122,029,058 |
| PERIMETER SOLUTIONS INC | COM | 71385m107 | — | 3,322,708 shares | $118,454,525 |
| ASML HOLDINGS N.V. | COM | n07059210 | — | 51,824 shares | $103,101,315 |
| MONOLITHIC PWR SYS INC COM | COM | 609839105 | — | 72,954 shares | $100,848,571 |
| INTUITIVE SURGICAL INC | COM | 46120e602 | — | 250,449 shares | $99,598,558 |
| CADENCE DESIGN SYSTEMS INC. | COM | 127387108 | — | 259,282 shares | $97,313,724 |
| MICROSOFT CORP | COM | 594918104 | — | 260,499 shares | $97,171,521 |
| GUIDEWIRE SOFTWARE INC | COM | 40171v100 | — | 726,645 shares | $89,413,724 |
| CBRE GROUP INC | COM | 12504l109 | — | 595,199 shares | $80,167,378 |
| BIO-TECHNE CORP | COM | 09073m104 | — | 1,029,772 shares | $72,753,419 |
| DANAHER CORP | COM | 235851102 | — | 368,898 shares | $70,267,773 |
| BROADCOM INC | COM | 11135f101 | — | 171,833 shares | $64,909,831 |
| MOTOROLA SOLUTIONS INC. | COM | 620076307 | — | 156,051 shares | $64,806,620 |
| DATADOG INC CL A | COM | 23804l103 | — | 239,350 shares | $62,317,166 |
| VEEVA SYSTEMS, INC. | COM | 922475108 | — | 334,373 shares | $59,341,178 |
| MSCI INC COM | COM | 55354g100 | — | 103,680 shares | $58,065,163 |
| APPLE INC | COM | 037833100 | — | 197,541 shares | $57,160,593 |
| NOVANTA INC COM NPV | COM | 67000b104 | — | 332,049 shares | $53,871,570 |
| KINSALE CAPITAL GROUP INC. | COM | 49714p108 | — | 160,589 shares | $52,963,997 |
| APPFOLIO, INC | COM | 03783c100 | — | 318,951 shares | $51,143,862 |
| MEDPACE HOLDINGS, INC. | COM | 58506q109 | — | 96,455 shares | $51,081,524 |
| TAIWAN SEMICONDUCTOR MFG LTD A | COM | 874039100 | — | 106,282 shares | $50,757,095 |
| REPLIGEN CORPORATION | COM | 759916109 | — | 356,854 shares | $48,689,109 |
| MARKEL GROUP INC | COM | 570535104 | — | 24,038 shares | $46,947,079 |
| LANDBRIDGE COMPANY LLC CL A | COM | 514952100 | — | 567,536 shares | $44,971,554 |
| FLOOR & DECOR HOLDINGS, INC. | COM | 339750101 | — | 750,501 shares | $44,549,766 |
| CASELLA WASTE SYSTEMS INC CL A | COM | 147448104 | — | 446,270 shares | $43,274,812 |
| O REILLY AUTOMOTIVE | COM | 67103h107 | — | 467,562 shares | $43,057,785 |
| S & P GLOBAL INC | COM | 78409v104 | — | 98,000 shares | $39,911,672 |
| AMPHENOL CORP NEW CL A | COM | 032095101 | — | 226,067 shares | $39,860,097 |
| UBER TECHNOLOGIES, INC. | COM | 90353t100 | — | 545,122 shares | $39,336,004 |
| STRYKER CORP | COM | 863667101 | — | 121,896 shares | $38,377,737 |
| HAYWARD HOLDINGS INC | COM | 421298100 | — | 2,192,729 shares | $37,956,147 |
| GOOSEHEAD INSURANCE, INC. | COM | 38267d109 | — | 775,412 shares | $37,607,482 |
| HAMILTON LANE INC | COM | 407497106 | — | 476,169 shares | $37,536,413 |
| COSTAR GROUP INC | COM | 22160n109 | — | 1,319,009 shares | $37,354,340 |
| CROWDSTRIKE HOLDINGS, INC. | COM | 22788c105 | — | 48,630 shares | $37,111,498 |
| VERALTO CORP | COM | 92338c103 | — | 417,939 shares | $37,062,846 |
| RBC BEARINGS INC | COM | 75524b104 | — | 56,282 shares | $36,248,895 |
| ONTO INNOVATION INC | COM | 683344105 | — | 93,905 shares | $35,538,294 |
| NETFLIX INC | COM | 64110l106 | — | 484,617 shares | $34,601,654 |
| QUALCOMM INC | COM | 747525103 | — | 183,258 shares | $33,864,243 |
| MEDLINE INC CL A | COM | 58507v107 | — | 801,249 shares | $31,601,261 |
| APPLIED INDL TECHNOLOGIES INC | COM | 03820c105 | — | 90,968 shares | $30,760,883 |
| META PLATFORMS INC CL A | COM | 30303m102 | — | 51,944 shares | $29,259,648 |
| FEDERAL SIGNAL CORP | COM | 313855108 | — | 213,990 shares | $27,495,614 |
| METTLER TOLEDO INTL | COM | 592688105 | — | 21,280 shares | $27,185,962 |
| CSW INDUSTRIALS INC | COM | 126402106 | — | 97,020 shares | $27,000,616 |
| PROCORE TECHNOLOGIES INC | COM | 74275k108 | — | 650,221 shares | $26,411,965 |
| MANHATTAN ASSOCS INC COM | COM | 562750109 | — | 188,634 shares | $26,267,268 |
| COPART INC COM | COM | 217204106 | — | 902,063 shares | $25,429,163 |
| SITEONE LANDSCAPE SUPPLY, INC. | COM | 82982l103 | — | 219,910 shares | $25,159,874 |
| PDF SOLUTIONS INC | COM | 693282105 | — | 354,951 shares | $25,127,000 |
| ENTEGRIS INC | COM | 29362u104 | — | 139,125 shares | $25,022,970 |
| JOHNSON & JOHNSON | COM | 478160104 | — | 92,077 shares | $23,384,796 |
| CORE & MAIN INC CL A | COM | 21874c102 | — | 479,476 shares | $23,134,736 |
| THERMO FISHER SCIENTIFIC INC | COM | 883556102 | — | 45,263 shares | $22,693,006 |
| HEALTHEQUITY, INC. | COM | 42226a107 | — | 247,132 shares | $22,320,996 |
| ESCO TECHNOLOGIES INC | COM | 296315104 | — | 63,005 shares | $22,054,358 |
| BADGER METER INC COM | COM | 056525108 | — | 143,925 shares | $21,355,580 |
| INSULET CORP COM | COM | 45784p101 | — | 138,249 shares | $21,048,462 |
| IDEXX LABS INC | COM | 45168d104 | — | 39,515 shares | $20,802,277 |
| TYLER TECHNOLOGIES INC | COM | 902252105 | — | 70,804 shares | $20,707,455 |
| WARBY PARKER INC CL A | COM | 93403j106 | — | 676,256 shares | $20,517,606 |
| AGILYSYS INC | COM | 00847j105 | — | 194,256 shares | $20,299,738 |
| SAIA INC | COM | 78709y105 | — | 45,102 shares | $18,995,209 |
| SHERWIN-WILLIAMS CO | COM | 824348106 | — | 52,171 shares | $17,963,639 |
| PROCTER & GAMBLE CO | COM | 742718109 | — | 121,751 shares | $17,853,567 |
| VSE CORP | COM | 918284100 | — | 77,573 shares | $17,725,401 |
| MORNINGSTAR INC | COM | 617700109 | — | 106,374 shares | $16,596,453 |
| PTC INC | COM | 69370c100 | — | 145,019 shares | $16,475,572 |
| LEMAITRE VASCULAR | COM | 525558201 | — | 167,053 shares | $16,030,366 |
| KADANT INC | COM | 48282t104 | — | 46,558 shares | $14,629,798 |
| VERISK ANALYTICS INC | COM | 92345y106 | — | 81,399 shares | $14,613,495 |
| WINGSTOP INC. | COM | 974155103 | — | 83,931 shares | $14,554,475 |
| SIMPSON MANUFACTURING CO | COM | 829073105 | — | 69,301 shares | $14,508,240 |
| MERCURY SYS INC | COM | 589378108 | — | 113,611 shares | $13,897,976 |
| SERVICENOW INC | COM | 81762p102 | — | 139,821 shares | $13,881,429 |
| BROWN & BROWN | COM | 115236101 | — | 214,820 shares | $13,780,681 |
| RAMBUS INC | COM | 750917106 | — | 102,771 shares | $13,641,788 |
| COSTCO WHOLESALE CO | COM | 22160k105 | — | 14,239 shares | $13,319,994 |
| DOUGLAS DYNAMICS INC | COM | 25960r105 | — | 246,319 shares | $13,288,929 |
| THE DESCARTES SYSTEMS GROUP IN | COM | 249906108 | — | 188,682 shares | $13,064,312 |
| ALPHABET INC. CLASS A | COM | 02079k305 | — | 36,036 shares | $12,878,185 |
| MICROCHIP TECH INC | COM | 595017104 | — | 138,033 shares | $12,588,578 |
| SHOPIFY INC. | COM | 82509l107 | — | 110,176 shares | $12,579,896 |
| BOOZ ALLEN HAMILTON HOLDING CO | COM | 099502106 | — | 203,498 shares | $12,346,251 |
| ROPER TECHNOLOGIES INC | COM | 776696106 | — | 34,844 shares | $11,790,861 |
| AMERICAN TOWER CORP | COM | 03027x100 | — | 66,426 shares | $10,865,280 |
| ENSIGN GROUP INC COM | COM | 29358p101 | — | 62,866 shares | $10,077,377 |