13F Insight
DOSSIER · 13F-HR · Q3 2026

BROWN BROTHERS HARRIMAN & CO

$23.3B in tracked AUM across 1,984 positions as of Q3 2026.

BB
CIK 0000014661 · last filed Sep 30, 2026
Total AUM
$23.3B
as of Q3 2026
Holdings
1,984
+166 QoQ
positions
Whale Score
65
65
tracked
Activity
1485
+253 new, −87 sold
changes this Q
AI Analysis · Q3 2026

BROWN BROTHERS HARRIMAN & CO filed its latest 13F-HR for Q3 2026. 1485 position changes this quarter — 253 new, 87 exited, 754 added, 391 trimmed.

Quarter at a glance — Q3 2026

1485 material changes this filing.

TRIM
KLACKLA CORP
-206K sh
$-364M
2.4%
ADD
IVVISHARES CORE S&P 500 ETF
+312K sh
+$281M
9.2%
TRIM
MSFTMICROSOFT CORP
-26K sh
+$274M
4.5%
ADD
ACWIISHARES MSCI ACWI ETF
+1.1M sh
+$180M
1.1%
TRIM
AMATAPPLIED MATERIALS INC
-35K sh
$-159M
1.4%
ADD
IEFAISHARES CORE MSCI EAFE ETF
+1.3M sh
+$129M
5.0%
TRIM
AKREAKRE FOCUS ETF
-2.2M sh
$-120M
1.2%

Top 10 holdings

By portfolio weight as of Q3 2026. Source: SEC EDGAR 13F-HR filings.

#HoldingValueSharesWeight
01
IVV
ISHARES CORE S&P 500 ETF
$2.1B2.8M9.2%02
IEFA
ISHARES CORE MSCI EAFE ETF
$1.2B12.1M5.0%03
MSFT
MICROSOFT CORP
$1.0B2.0M4.5%04
AAPL
APPLE INC
$906M2.7M3.9%05
GOOG
ALPHABET INC-CL C
$904M2.7M3.9%06
NVDA
NVIDIA CORP
$567M2.5M2.4%07
AMZN
AMAZON.COM INC
$562M2.3M2.4%08
BRK/B
BERKSHIRE HATHAWAY INC-CL B
$562M1.1M2.4%09
KLAC
KLA CORP
$551M2.8M2.4%10
QLTY
GMO U.S. QUALITY ETF
$482M11.3M2.1%

Filing history

2026Q3Sep 30
$23.3B▲ 2.0%
1,984 positionsView →2026Q2Jun 30
$22.8B▲ 22.3%
1,818 positionsView →2026Q1Mar 31
$18.6B▲ 1.7%
1,800 positionsView →2025Q4Dec 31
$18.3B▲ 11.7%
1,833 positionsView →2025Q3Sep 30
$16.4B▲ 5.6%
1,678 positionsLocked2025Q2Jun 30
$15.6B▲ 8.7%
1,547 positionsLocked2025Q1Mar 31
$14.3B▲ 0.4%
1,304 positionsLocked2024Q4Dec 31
$14.3B▼ 3.0%
1,458 positionsLocked2024Q3Sep 30
$14.7B▲ 10.7%
1,420 positionsLocked2024Q2Jun 30
$13.3B▲ 2.1%
1,144 positionsLocked2024Q1Mar 31
$13.0B▲ 8.2%
1,158 positionsLocked2023Q4Dec 31
$12.0B▲ 6.3%
1,148 positionsLocked
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