Institutional Manager · CIK 0000934999
DF DENT & CO INC
BALTIMORE, MD · File #028-03691
Latest AUM
$6.95B
Positions
263
Top-10 Concentration
37.3%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| ADD | SERVICENOW INC | NOW | +355,098 | +$54.4M | -$47.9M |
| REDUCE | SYNOPSYS INC | SNPS | -110,977 | -$52.1M | -$3.3M |
| REDUCE | VERALTO CORP | VLTO | -434,768 | -$43.4M | -$10.8M |
| REDUCE | COPART INC COM | CPRT | -1,026,481 | -$40.2M | -$12.8M |
| NEW | NETFLIX INC | NFLX | +368,624 | +$34.6M | $0 |
| REDUCE | HEICO CORP CL A | HEI-A | -135,771 | -$34.3M | -$1.9M |
| REDUCE | ALPHABET INC CL C | GOOG | -99,455 | -$31.2M | +$64.9M |
| REDUCE | MASTERCARD INC CL A | MA | -50,215 | -$28.7M | +$762,821 |
| REDUCE | VULCAN MATERIALS CO | 929160109 | -95,296 | -$27.2M | -$18.7M |
| REDUCE | VISA INC CL A | V | -76,394 | -$26.8M | +$7.0M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025263 pos · $6.95B
- 13F HOLDINGS REPORTQ/E Sep 2025272 pos · $7.74B
- 13F HOLDINGS REPORTQ/E Jun 2025251 pos · $7.88B
- 13F HOLDINGS REPORTQ/E Mar 2025261 pos · $7.49B
- 13F HOLDINGS REPORTQ/E Dec 2024248 pos · $7.90B
- 13F HOLDINGS REPORTQ/E Sep 2024262 pos · $8.22B
- 13F HOLDINGS REPORTQ/E Jun 2024244 pos · $7.74B
- 13F HOLDINGS REPORTQ/E Mar 20242,660 pos · $8.19B
- 13F HOLDINGS REPORTQ/E Dec 2023256 pos · $6.83B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | ALPHABET INC CL C | GOOG | 824,929 | $258.9M | 4.62% |
| 2 | HEICO CORP CL A | HEI-A | 988,075 | $249.4M | 4.45% |
| 3 | VISA INC CL A | V | 673,030 | $236.0M | 4.21% |
| 4 | VULCAN MATERIALS CO | 929160109 | 740,958 | $211.3M | 3.77% |
| 5 | AMAZON.COM INC | AMZN | 874,676 | $201.9M | 3.60% |
| 6 | TRANSDIGM GROUP INC | TDG | 149,748 | $199.1M | 3.56% |
| 7 | ECOLAB INC | ECL | 709,923 | $186.4M | 3.33% |
| 8 | WASTE CONNECTIONS INC | WCN | 1,040,943 | $182.5M | 3.26% |
| 9 | MASTERCARD INC CL A | MA | 318,262 | $181.7M | 3.24% |
| 10 | MOODYS CORP | MCO | 351,928 | $179.8M | 3.21% |
| 11 | INTUITIVE SURGICAL INC | ISRG | 305,391 | $173.0M | 3.09% |
| 12 | MICROSOFT CORP | MSFT | 320,463 | $155.0M | 2.77% |
| 13 | BIO-TECHNE CORP | TECH | 2,592,215 | $152.4M | 2.72% |
| 14 | CBRE GROUP INC | CBRE | 860,684 | $138.4M | 2.47% |
| 15 | COSTAR GROUP INC | CSGP | 2,007,630 | $135.0M | 2.41% |
| 16 | VEEVA SYSTEMS, INC. | VEEV | 594,801 | $132.8M | 2.37% |
| 17 | S & P GLOBAL INC | SPGI | 241,603 | $126.3M | 2.25% |
| 18 | KINSALE CAPITAL GROUP INC. | 49714p108 | 315,756 | $123.5M | 2.21% |
| 19 | FASTENAL CO | FAST | 2,899,293 | $116.3M | 2.08% |
| 20 | MONOLITHIC PWR SYS INC COM | 609839105 | 127,277 | $115.4M | 2.06% |