Stocks/Funds/CIK 763212

PRIMECAP MANAGEMENT CO/CA/

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 763212
Assets
$127.01B
+5.0% YoY
Holdings
320
Lifetime alpha vs market
+1.70% annual
Average hold time
6.7 yr
median 7.0 yr

Quarterly history

Cum return +63% vs S&P +52% · α +11% lifetimeAUM $127.0B · peak $148.8BFlow $-2.6B (-2%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-1.08%
trims when stocks drop
when a holding falls −10%+
Middle response
-3.02%
baseline attrition
Rally response
-3.71%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
LLYEli Lilly and Company$8.48B6.7%+12.2%10.5 yr
MUMicron Technology, Inc.$7.39B5.8%+289.6%10.5 yr
GOOGLAlphabet Inc.$4.31B3.4%5.5 yr
AZNAstraZeneca PLC$3.59B2.8%+36.2%0.3 yr
KLACKLA Corporation$3.59B2.8%+118.2%10.5 yr
INTCIntel Corporation$3.34B2.6%+94.3%10.5 yr
AMGNAmgen Inc.$3.12B2.5%+16.5%10.5 yr
NVDANVIDIA Corporation$3.00B2.4%+60.9%10.5 yr
FDXFedEx Corporation$2.96B2.3%+49.3%10.5 yr
BIIBBiogen Inc.$2.71B2.1%+34.0%10.5 yr
MSFTMicrosoft Corporation$2.69B2.1%-0.6%10.5 yr
AMZNAmazon.com, Inc.$2.52B2.0%+9.5%10.5 yr
BABAAlibaba Group Holding Li$2.35B1.8%-3.5%10.5 yr
TSLATesla, Inc.$2.28B1.8%+43.4%10.5 yr
SCHWThe Charles Schwab Corpo$2.20B1.7%+21.5%10.5 yr

Portfolio composition (YoY)

Industry mix
Semiconductors18.1%+4.9pp$22.96B
Drug Manufacturers - General17.3%-0.8pp$21.97B
Internet Content & Information6.2%+1.1pp$7.85B
Specialty Retail4.0%+0.7pp$5.14B
Airlines, Airports & Air Services4.0%-0.1pp$5.10B
Software - Infrastructure3.6%-1.2pp$4.54B
Financial - Capital Markets3.5%+0.8pp$4.46B
Hardware, Equipment & Parts3.0%+0.7pp$3.78B
Apparel - Retail3.0%+0.6pp$3.78B
Medical - Devices2.9%-1.4pp$3.62B
Country
US87.2%+0.4pp
GB4.8%+3.4pp
CN3.0%-0.4pp
SG1.4%+0.3pp
CH1.0%-0.2pp
JP1.0%-1.0pp
NL0.4%+0.1pp
SE0.3%+0.0pp
Top 5: 21.5% · Top 10: 33.5% · Top 25: 56.3%

Winners

TickerPrev $PnLYoY %
MU$3.24B+9.36B289.6%
KLAC$3.32B+3.89B118.2%
INTC$1.75B+1.65B94.3%
LLY$12.21B+1.48B12.2%
GOOG$1.70B+1.43B84.3%

Losers

TickerPrev $PnLYoY %
BSX$3.68B-1.39B-37.8%
V$1.36B-0.18B-13.1%
BABA$2.73B-0.09B-3.5%
MSFT$3.41B-0.02B-0.6%

Top buys this quarter · 15

AZN AstraZeneca PLCnew+$3.59B
ADBE Adobe Inc.+$1.15B
BA The Boeing Company+$157M
GTLB GitLab Inc.+$133M
ERIC Telefonaktiebolaget LM Ericsso+$121M
BSX Boston Scientific Corporation+$2.04B
PYPL PayPal Holdings, Inc.+$453M
HPQ HP Inc.+$73M
WM Waste Management, Inc.new+$64M
CARR Carrier Global Corporation+$52M

Top sells this quarter · 15

MU Micron Technology, Inc.$7.08B
KLAC KLA Corporation$3.49B
QCOM QUALCOMM Incorporated$210M
SNDK Sandisk Corporation$180M
FLEX Flex Ltd.$1.61B
TXN Texas Instruments Incorporated$1.75B
FDX FedEx Corporation$2.46B
TSLA Tesla, Inc.$71M
IQV IQVIA Holdings Inc.$63M
STX Seagate Technology Holdings pl$60M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$127.01B320+30.02%+17.59%+12.43%-2.61B
2025-12-31$132.11B319+28.66%+17.72%+10.94%-10.49B
2025-09-30$130.57B327+16.38%+17.52%-1.14%-9.41B
2025-06-30$126.19B333+6.28%+14.94%-8.66%-6.12B
2025-03-31$120.96B335+0.84%+8.30%-7.47%-4.40B
2024-12-31$129.12B329+13.10%+24.89%-11.79%-5.24B
2024-09-30$136.01B336+26.22%+36.04%-9.82%-3.92B
2024-06-30$138.13B332+23.87%+24.49%-0.62%-1.03B
2024-03-31$134.08B335+30.36%+29.62%+0.73%-3.47B
2023-12-31$126.31B334+27.33%+26.18%+1.15%-4.29B
2023-09-30$118.47B331+26.33%+21.57%+4.76%-0.52B
2023-06-30$119.68B328+19.91%+19.42%+0.48%-5.58B
2023-03-31$114.68B331-4.74%-7.82%+3.08%-1.50B
2022-12-31$109.23B334+9.38%+7.56%+1.82%-3.80B
2022-09-30$103.34B335-5.63%-4.93%-0.70%-2.23B
2022-06-30$111.87B341-13.23%-16.11%+2.88%-3.17B