PRIMECAP MANAGEMENT CO/CA/

Q3 2026 13F-HR Holdings

Location
Pasadena, CA
Holdings as of
9/30/2026
Date filed
11/12/2026
Form type
13F-HR
Num holdings
327
Total value ($000)
$161,276,900
Net value change ($000)
-7,835,542 (-4.6%)
New positions
11
Sold out positions
8
Turnover %
0.5%
Sector allocation + QoQ delta (equities-only)
Prev filing: 8/14/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q2 2026
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
MSFT 927,782 34.8%
NVDA 453,885 13.3%
NTAP 413,596 29.6%
BSX 402,748 18.7%
ONC 368,448 25.8%
ILMN 337,430 54.6%
HPE 304,393 39.4%
TMO 285,527 28.7%
AMZN 278,652 9.8%
COP 245,245 20.4%
Top Reduces (Value $000, Stocks/ETFs)
MU -2,348,402 -10.6%
KLAC -2,201,315 -35.5%
INTC -1,218,176 -11.6%
FLEX -1,141,592 -30.2%
AZN -507,221 -14.8%
LLY -491,762 -4.5%
LUV -468,682 -18.7%
GLW -421,656 -40.0%
UAL -419,107 -18.7%
TSLA -346,207 -13.5%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type