WEITZ INVESTMENT MANAGEMENT, INC.
SEC Form 13F institutional filer · CIK 0000883965
13F-HR · 36 reported holdings · 2026-03-31
SEC-registered institutional investment manager.
Reported long-US-equity value
$1.24B
Top-10 concentration
62.9%
WEITZ INVESTMENT MANAGEMENT, INC. — $1.24B AUM allocation strategy
WEITZ INVESTMENT MANAGEMENT, INC. files SEC Form 13F and reports $1.24B of long US equity value across 36 reported holdings for 2026-03-31.
Its largest sector bet is Financials 28.7%, followed by Health Care 16.9% and Information Technology 13.0%.
The top 10 holdings account for 63% of reported value — a conviction-weighted book concentrated in its best ideas. 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.
WEITZ INVESTMENT MANAGEMENT, INC. — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$1.24B
total across 36 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
63% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$MSFT +23.5K sh · −$7.87M+$ACN +9.8K sh · −$9.32M+$VMC +4K sh · −$1.63M
Biggest trims (shares)
−$CSGP −203K sh · −$27.5M−$GPN −170K sh · −$16.5M−$TECH −150K sh · −$13.1M
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)
- Life Sciences Tools & Services14.8%—
- Interactive Media & Services12.4%—
- Transaction & Payment Processing Services12.3%—
- Multi-Sector Holdings10.7%—
- Construction Materials6.6%—
- Insurance Brokers5.6%—
- Semiconductors5.2%—
- Systems Software5.0%—
- Other holdings27.3%—
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 |
|---|---|---|---|---|---|
| $BRK.B | Berkshire Hathaway Inc.-Class B | 279K | $134M | -8K | 10.7% |
| $GOOGL | Alphabet Inc | 327K | $93.7M | -21.1K | 7.5% |
| $DHR | Danaher Corporation | 478K | $90.6M | -36.2K | 7.3% |
| $V | Visa Inc | 265K | $80.2M | -5.25K | 6.5% |
| $MA | Mastercard Incorporated | 147K | $73.5M | -8.9K | 5.9% |
| $AON | Aon plc | 214K | $69M | -4.88K | 5.6% |
| $MSFT | Microsoft Corporation | 169K | $62.7M | +23.5K | 5.0% |
| $META | Meta Platforms Inc | 106K | $60.5M | -3K | 4.9% |
| $TMO | Thermo Fisher Scientific Inc | 121K | $59.5M | -13.9K | 4.8% |
| $VMC | Vulcan Materials Company | 214K | $58.3M | +4K | 4.7% |
…and 26 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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