BROWN BROTHERS HARRIMAN & CO
SEC Form 13F institutional filer · CIK 0000014661
13F-HR · 523 reported holdings · 2026-03-31
Brown Brothers Harriman & Co is a bank.
Reported long-US-equity value
$14.36B
Top-10 concentration
45.2%
BROWN BROTHERS HARRIMAN & CO — $14.4B AUM allocation strategy
BROWN BROTHERS HARRIMAN & CO files SEC Form 13F and reports $14.4B of long US equity value across 523 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 19.7%, followed by Financials 11.8% and Communication Services 6.8%.
The top 10 holdings account for 45% 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.
BROWN BROTHERS HARRIMAN & CO — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$14.4B
total across 523 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
45% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$USB +5.63M sh · +$293M+$IVV +2.3M sh · +$513M+$PANW +584K sh · +$93.3M
Biggest trims (shares)
−$ADP −669K sh · −$174M−$OTIS −438K sh · −$46.2M−$NOW −435K sh · −$81.3M
Exited to nil (held last quarter, gone now)
None this quarter
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)
- Interactive Media & Services6.8%—
- Semiconductor Materials & Equipment5.7%—
- Systems Software5.0%—
- Technology Hardware, Storage & Peripherals4.8%—
- Multi-Sector Holdings3.8%—
- Broadline Retail3.3%—
- Consumer Staples Merchandise Retail3.3%—
- Environmental & Facilities Services2.6%—
- Other holdings64.7%—
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
9 of 9 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $GOOGL | Alphabet Inc | 2.83M | $811M | -189K | 5.6% |
| $MSFT | Microsoft Corporation | 1.95M | $721M | +84.3K | 5.0% |
| $AAPL | Apple Inc | 2.71M | $687M | +377K | 4.8% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 1.14M | $546M | +14.6K | 3.8% |
| $KLAC | KLA Corporation | 350K | $515M | -84K | 3.6% |
| $AMZN | Amazon.com Inc | 2.28M | $475M | +39.4K | 3.3% |
| $WM | Waste Management Inc | 1.65M | $379M | +88 | 2.6% |
| $MA | Mastercard Incorporated | 725K | $362M | -265K | 2.5% |
| $LIN | Linde plc | 724K | $359M | -2.45K | 2.5% |
…and 514 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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