PRIMECAP MANAGEMENT CO/CA/

View all activity View 13F on SEC

Data as of Q4 2025

Institutional investor tracked via SEC 13F filings. Portfolio snapshot as of 2025-12-31.SEC EDGAR Source

Assets Under Management

$132.1B

Total Positions

319

New This Quarter

Filing Period

2025-12-31

Portfolio Allocation

Top holdings by portfolio weight

LLY7.54%

MU5.36%

GOOGL3.58%

MSFT2.67%

KLAC2.65%

AZN2.57%

NVDA2.43%

BSX2.24%

AMGN2.21%

TSLA2.15%

Other23.38%

Position Outcomes

Best and worst performing positions by estimated return

Top Winners

KLAC29Q held

KLA CORP

Avg $80.81 · $3.3B est. P&L

Est. P&L

+1439.00%

CRDO15Q held

Credo Technology Group Holding Ltd

Avg $10.44 · $9.1M est. P&L

Est. P&L

+1288.40%

AXON29Q held

Axon Enterprise Inc

Avg $43.03 · $6.4M est. P&L

Est. P&L

+1229.56%

Top Losers

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View plans

Cost basis estimates based on full filing history using quarter-end prices. Actual transaction prices are not disclosed in 13F filings.

Top Holdings(Showing 25 of 319 — sorted by value)

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Activity:

Stock	Shares	Value	Weight	Price Trend	Avg Buy	Est. P&L	Held	Conviction
LLY Eli Lilly & Co	9.3M	$10B	7.5%	—	$103.84	+938.05%	29 qtrs	Decreased 0
MU Micron Technology Inc	24.8M	$7.1B	5.4%	—	$31.49	+829.19%	29 qtrs	Decreased 0
GOOGL Alphabet Inc	15.1M	$4.7B	3.6%	—	$96.25	+226.06%	29 qtrs	Decreased 0
MSFT Microsoft Corp	7.3M	$3.5B	2.7%	—	$95.17	+412.21%	29 qtrs	Decreased 0
KLAC KLA CORP	2.9M	$3.5B	2.6%	—	$80.81	+1439.00%	29 qtrs	Decreased 0
AZN AstraZeneca PLC	36.9M	$3.4B	2.6%	—	$63.64	+184.18%	29 qtrs	Decreased 0
NVDA NVIDIA Corp	17.2M	$3.2B	2.4%	—	$112.03	+67.39%	29 qtrs	Decreased 0
BSX Boston Scientific Corp	31.1M	$3B	2.2%	—	$35.49	+170.55%	29 qtrs	Decreased 0
AMGN Amgen Inc	8.9M	$2.9B	2.2%	—	$153.34	+112.88%	29 qtrs	Decreased 0
TSLA Tesla Inc	6.3M	$2.8B	2.2%	—	$214.88	+111.48%	29 qtrs	Decreased 0
AMZN Amazon.com Inc	12.3M	$2.8B	2.1%	—	$182.64	+27.31%	29 qtrs	Increased 62
INTC Intel Corp	76.1M	$2.8B	2.1%	—	$37.69	-1.03%	29 qtrs	Decreased 0
BABA ALIBABA GROUP HLDG LTD	19M	$2.8B	2.1%	—	$131.09	+12.41%	29 qtrs	Decreased 0
BIIB Biogen Inc	14.8M	$2.6B	2.0%	—	$291.55	-39.50%	29 qtrs	Decreased 0
FDX FedEx Corp	8.5M	$2.5B	1.9%	—	$145.69	+99.78%	29 qtrs	Decreased 0
SCHW Charles Schwab Corp/The	23.3M	$2.3B	1.8%	—	$81.11	+23.55%	29 qtrs	Increased 55
LUV Southwest Airlines Co	47.4M	$2B	1.5%	—	$42.18	-2.16%	29 qtrs	Decreased 0
GOOG Alphabet Inc	5.8M	$1.8B	1.4%	—	$95.04	+230.95%	29 qtrs	Decreased 0
UAL United Airlines Holdings Inc	16M	$1.8B	1.4%	—	$82.61	+34.99%	29 qtrs	Decreased 0
TXN Texas Instruments Inc	10.1M	$1.7B	1.3%	—	$76.40	+128.12%	29 qtrs	Decreased 0
ROST Ross Stores Inc	9.2M	$1.7B	1.3%	—	$78.90	+129.96%	29 qtrs	Decreased 0
FLEX Flex Ltd	26.7M	$1.6B	1.2%	—	$6.06	+917.77%	29 qtrs	Decreased 0
ONC BEONE MEDICINES LTD	5M	$1.5B	1.1%	—	$205.50	+48.28%	29 qtrs	Decreased 0
RJF Raymond James Financial Inc	9.3M	$1.5B	1.1%	—	$77.59	+108.80%	29 qtrs	Decreased 0
TJX TJX Cos Inc/The	9.7M	$1.5B	1.1%	—	$39.75	+289.71%	29 qtrs	Decreased 0
Showing 25 of 319 results.PROUpgrade to see all →

Accumulation Streaks

Positions with 2+ consecutive quarters of increases — persistent directional conviction.

Security

AMZNAmazon.com Inc

Q1 2024 → Q4 2025+7.9M shares+$2.2B

COPConocoPhillips

Q2 2024 → Q4 2025+8.8M shares+$734.2M

USFDUS Foods Holding Corp

Q3 2024 → Q4 2025+3.8M shares+$288.4M

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Data sourced from SEC EDGAR 13F filings. Not financial advice. Full disclaimer