DF DENT & CO INC
SEC Form 13F institutional filer · CIK 0000934999
13F-HR · 160 reported holdings · 2026-03-31
SEC-registered institutional investment manager.
Reported long-US-equity value
$3.48B
Top-10 concentration
43.7%
DF DENT & CO INC — $3.48B AUM allocation strategy
DF DENT & CO INC files SEC Form 13F and reports $3.48B of long US equity value across 160 reported holdings for 2026-03-31.
Its largest sector bet is Financials 16.9%, followed by Health Care 11.4% and Materials 8.2%.
The top 10 holdings account for 44% of reported value — a broadly spread portfolio. The sector and industry splits below are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.
DF DENT & CO INC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$3.48B
total across 160 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
44% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$AVGO +194K sh · +$60M+$APH +184K sh · +$23M+$NFLX +161K sh · +$16.4M
Biggest trims (shares)
−$VLTO −615K sh · −$67.4M−$TECH −549K sh · −$45.7M−$CSGP −402K sh · −$70.2M
Exited to nil (held last quarter, gone now)
$IWM ($6.23M last qtr)$IVZ ($581K last qtr)$FICO ($309K last qtr)$UNP ($237K last qtr)$O ($215K last qtr)
Sector allocation (share of reported value)
each slice is a share of the reported long-US-equity value — smaller sectors and the rest of the book roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Industry allocation (share of reported value)
- Transaction & Payment Processing Services9.5%—
- Financial Exchanges & Data7.5%—
- Interactive Media & Services6.2%—
- Life Sciences Tools & Services5.4%—
- Broadline Retail4.7%—
- Real Estate Services4.4%—
- Construction Materials4.3%—
- Aerospace & Defense4.1%—
- Other holdings53.9%—
the finer GICS cut of the same book — same denominator — smaller industries roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Top S&P 500 holdings
10 of 10 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $GOOGL | Alphabet Inc | 757K | $217M | -68.1K | 6.2% |
| $V | Visa Inc | 618K | $187M | -55K | 5.4% |
| $AMZN | Amazon.com Inc | 796K | $166M | -78.2K | 4.8% |
| $VMC | Vulcan Materials Company | 544K | $148M | -197K | 4.2% |
| $MA | Mastercard Incorporated | 287K | $143M | -31.1K | 4.1% |
| $TDG | Transdigm Group Incorporated | 123K | $142M | -27K | 4.1% |
| $ECL | Ecolab Inc | 519K | $138M | -191K | 4.0% |
| $MCO | Moody's Corporation | 295K | $129M | -56.5K | 3.7% |
| $ISRG | Intuitive Surgical Inc | 275K | $127M | -30.1K | 3.6% |
| $FAST | Fastenal Company | 2.67M | $124M | -232K | 3.6% |
…and 150 more holdings in the full 13F filing (top positions only shown).
SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported
← All 13F filers·← QuantOrb.pro
How to read Δ QoQ — the five insight categories, and the caveats
The categories. Analysts, quants and retail traders look past total portfolio value to isolate actionable signals. Five categories matter.
Conviction & concentration shifts
New positions vs complete exits — a brand-new stock signals high conviction; a full liquidation suggests a broken thesis or tax-loss harvesting. Aggressive sizing — look at share count, not dollars: a 20% share increase during a drawdown is strong dip-buying. Concentration — a narrowing top-5/10 means conviction; spreading capital across more names means hedging.
Sector & macro allocation rotations
Aggregating Δ QoQ moves across sectors shows where smart money is leaning in or sneaking out — rotating out of growth into defensives or energy, for example. The fund's total long equity exposure quarter-over-quarter is a proxy for overall institutional risk appetite.
Crowding & smart-money consensus
When several managers initiate or expand the same stock in the same quarter, that is institutional consensus. Contrarian reads: top pickers buying hard into a beaten-down name the market is selling.
Derivative & option overlays
Reported call/put changes indicate whether managers are adding downside hedges or leveraging upside exposure. Note: a long increase may be half of a market-neutral pair trade.
Who reads this
| Retail "cloners" | High-conviction ideas to replicate ~45 days after quarter-end. |
| Corporate IR | Which funds bought or dumped the stock, before the next call. |
| Quant / algo traders | Cross-sectional factor inputs: flow, momentum, ownership. |
Four caveats before you trade on it
- 45-day lag — holdings are quarter-end; positions may already be closed.
- Long-only — 13Fs miss shorts, pair trades and cash.
- No non-US / fixed income — the picture is US equities plus options.
- Corporate actions — splits and spinoffs distort raw share deltas.
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