Primecap Management Co

Return history

Last 4 years copying the filings

$100,000 would be $291,034

The same $100,000 in SPY would be $223,622.

Total return

+191%

Annualized (4Y CAGR)

+30.6%

vs SPY

+8.3 pts/yr

Moves a year

1182

Avg hold

2.1 years

Across 17 filings, buying each one the day it became public. Best quarter +24.4%, worst -9.4%.

All time

+121% since Nov 2021

Fund size $169B today

Sep 2022 to Sep 2026, at least 66% of the book priced each quarter. Not audited fund performance. What this covers

Each quarter is priced from the date its SEC filing became public, not the quarter it describes, and weighted by position size. A 13F shows long US stock holdings only, so shorts, cash, options, and anything bought and sold between two filings are not in this line.

New FDXF and exited CCL in Q2 2026.

$169.1B in this filing324 positions

Holdings as of Jun 30, 2026. Filed Aug 14, 2026.

1MUMicron Technology Inc13.12%
$22.2B - 19.2M shares-12.1%
2LLYEli Lilly & Co6.51%
$11.0B - 9.2M shares-0.5%
3INTCIntel Corp6.21%
$10.5B - 75.3M shares-0.7%

#	Stock				At Jun 30	Now
1	MUMicron Technology Inc	13.12%	$22.2B	-12.1%	$1154.29	$1082.28 -6.2%
2	LLYEli Lilly & Co	6.51%	$11.0B	-0.5%	$1199.43	$1183.46 -1.3%
3	INTCIntel Corp	6.21%	$10.5B	-0.7%	$139.63	$123.00 -11.9%

321 more on a paid plan

Unlock the full portfolio and quarterly changes.

Unlock all 321 holdings

What is missing

Top 10 concentration: 43%. This filing does not include cash, short positions, private investments, bonds, or many overseas holdings. Next filing due ~Nov 14, 2026.