DIAMOND HILL CAPITAL MANAGEMENT INC
SEC Form 13F institutional filer · CIK 0001217541
13F-HR · 82 reported holdings · 2026-03-31
Diamond Hill Capital Management Inc is an asset manager.
Reported long-US-equity value
$13.21B
Top-10 concentration
35.4%
DIAMOND HILL CAPITAL MANAGEMENT INC — $13.2B AUM allocation strategy
DIAMOND HILL CAPITAL MANAGEMENT INC files SEC Form 13F and reports $13.2B of long US equity value across 82 reported holdings for 2026-03-31.
Its largest sector bet is Financials 17.8%, followed by Information Technology 10.4% and Health Care 6.8%.
The top 10 holdings account for 35% 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.
DIAMOND HILL CAPITAL MANAGEMENT INC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$13.2B
total across 82 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
35% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$MSFT +819K sh · +$280M+$EQT +788K sh · +$70.5M+$SOLV +311K sh · −$9.08M
Biggest trims (shares)
−$KEY −4.45M sh · −$95.5M−$PFE −3.33M sh · −$63.5M−$AIG −2.24M sh · −$280M
Exited to nil (held last quarter, gone now)
$IP ($215M last qtr)$PGR ($21.3M last qtr)$L ($10.1M last qtr)$KKR ($6.46M last qtr)$AXP ($4.85M 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)
- Oil & Gas Exploration & Production5.9%—
- Multi-line Insurance4.9%—
- Multi-Sector Holdings4.6%—
- Application Software4.5%—
- Health Care Equipment4.2%—
- Insurance Brokers3.6%—
- Household Products3.5%—
- Semiconductors3.0%—
- Other holdings65.8%—
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 |
|---|---|---|---|---|---|
| $AIG | American International Group Inc. New | 8.58M | $645M | -2.24M | 4.9% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 1.27M | $610M | -257K | 4.6% |
| $ABT | Abbott Laboratories | 5.38M | $552M | +209K | 4.2% |
| $AON | Aon plc | 1.49M | $480M | -108K | 3.6% |
| $CL | Colgate-Palmolive Company | 5.41M | $461M | -1.83M | 3.5% |
| $FANG | Diamondback Energy Inc | 2.01M | $397M | -543K | 3.0% |
| $TXN | Texas Instruments Incorporated | 2.05M | $397M | -1.18M | 3.0% |
| $COP | ConocoPhillips | 2.92M | $385M | -1.24M | 2.9% |
| $MSFT | Microsoft Corporation | 1.02M | $379M | +819K | 2.9% |
| $COF | Capital One Financial Corporation | 2.02M | $368M | -468K | 2.8% |
…and 72 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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