What stocks does PRIMECAP Management own?

As of Q2 2026, PRIMECAP Management reported 324 positions with a combined 13F value of $169.1B. Its largest stock positions are MU ($22.2B), LLY ($11.0B) and INTC ($10.5B).

How often does PRIMECAP Management update its portfolio?

PRIMECAP Management files a 13F with the SEC every quarter, due 45 days after quarter end. The latest covers Q2 2026 and was filed Aug 14, 2026. The next one is due by Nov 16, 2026.

What does PRIMECAP Management's 13F leave out?

A 13F lists long positions in US-listed stocks and some options held on the last day of a quarter. It leaves out short positions, most bonds, holdings not listed in the US and anything bought or sold since the quarter ended.

Where does PRIMECAP Management's portfolio data come from?

From the 13F filings PRIMECAP Management makes to the SEC, available on EDGAR. Each quarter shows how positions changed from the one before.

Smart money

Primecap Management Co

Return history

Last 4 years · filing-date model

$100,000 to $267,194

$100,000 in SPY: $221,601.

Total return

+167%

Annualized (4Y CAGR)

+27.9%

vs SPY

+5.8 pts/yr

Moves a year

1182

Avg hold

2.1 years

17 filings · quarters -9.4% to +24.4%

All time

+112% since Nov 12, 2021

Fund size $169B today

Oct 17, 2022 to Oct 16, 2026 · min. 66% quarterly priced · Disclosed book, unaudited · Method

Position-weighted returns use each SEC filing date. Options use underlying-stock proxies, not option premiums; put proxies can lose more than 100%. Cash, shorts, non-13F holdings and trades between filings are excluded.

New FDXF and exited CCL in Q2 2026.

$169.1B in this filing324 positions

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

Share change vs Mar 31

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%
4KLACKla Corp3.66%
$6.2B - 20.5M shares+742.5%
5GOOGLAlphabet Inc3.14%
$5.3B - 14.9M shares-0.9%
6Flex LTD2.24%
$3.8B - 23.4M shares-8.0%
7AZNAstrazeneca PLC2.03%
$3.4B - 18.1M shares-0.7%
8NVDANvidia Corporation2.02%
$3.4B - 17.1M shares-0.6%

#	Stock				At Jun 30	Now
1	MUMicron Technology Inc	13.12%	$22.2B	-12.1%	$1154.29	$931.24 -19.3%
2	LLYEli Lilly & Co	6.51%	$11.0B	-0.5%	$1199.43	$1251.61 +4.4%
3	INTCIntel Corp	6.21%	$10.5B	-0.7%	$139.63	$95.37 -31.7%
4	KLACKla Corp	3.66%	$6.2B	+742.5%	$301.71	$174.46 -42.2%
5	GOOGLAlphabet Inc	3.14%	$5.3B	-0.9%	$357.37	$349.22 -2.3%
6	Flex LTD	2.24%	$3.8B	-8.0%	$162.07	-
7	AZNAstrazeneca PLC	2.03%	$3.4B	-0.7%	$189.62	$162.03 -14.6%
8	NVDANvidia Corporation	2.02%	$3.4B	-0.6%	$200.09	$217.23 +8.6%

316 more on a paid plan

Unlock the full portfolio and quarterly changes.

Unlock all 316 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 16, 2026.

Common questions

What stocks does PRIMECAP Management own?: As of Q2 2026, PRIMECAP Management reported 324 positions with a combined 13F value of $169.1B. Its largest stock positions are MU ($22.2B), LLY ($11.0B) and INTC ($10.5B).
How often does PRIMECAP Management update its portfolio?: PRIMECAP Management files a 13F with the SEC every quarter, due 45 days after quarter end. The latest covers Q2 2026 and was filed Aug 14, 2026. The next one is due by Nov 16, 2026.
What does PRIMECAP Management's 13F leave out?: A 13F lists long positions in US-listed stocks and some options held on the last day of a quarter. It leaves out short positions, most bonds, holdings not listed in the US and anything bought or sold since the quarter ended.
Where does PRIMECAP Management's portfolio data come from?: From the 13F filings PRIMECAP Management makes to the SEC, available on EDGAR. Each quarter shows how positions changed from the one before.

Smart money

Primecap Management Co

Return history

Last 4 years · filing-date model

$100,000 to $267,194

$100,000 in SPY: $221,601.

Total return

+167%

Annualized (4Y CAGR)

+27.9%

vs SPY

+5.8 pts/yr

Moves a year

1182

Avg hold

2.1 years

17 filings · quarters -9.4% to +24.4%

All time

+112% since Nov 12, 2021

Fund size $169B today

Oct 17, 2022 to Oct 16, 2026 · min. 66% quarterly priced · Disclosed book, unaudited · Method

New FDXF and exited CCL in Q2 2026.

$169.1B in this filing324 positions

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

Share change vs Mar 31

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%
4KLACKla Corp3.66%
$6.2B - 20.5M shares+742.5%
5GOOGLAlphabet Inc3.14%
$5.3B - 14.9M shares-0.9%
6Flex LTD2.24%
$3.8B - 23.4M shares-8.0%
7AZNAstrazeneca PLC2.03%
$3.4B - 18.1M shares-0.7%
8NVDANvidia Corporation2.02%
$3.4B - 17.1M shares-0.6%

#	Stock				At Jun 30	Now
1	MUMicron Technology Inc	13.12%	$22.2B	-12.1%	$1154.29	$931.24 -19.3%
2	LLYEli Lilly & Co	6.51%	$11.0B	-0.5%	$1199.43	$1251.61 +4.4%
3	INTCIntel Corp	6.21%	$10.5B	-0.7%	$139.63	$95.37 -31.7%
4	KLACKla Corp	3.66%	$6.2B	+742.5%	$301.71	$174.46 -42.2%
5	GOOGLAlphabet Inc	3.14%	$5.3B	-0.9%	$357.37	$349.22 -2.3%
6	Flex LTD	2.24%	$3.8B	-8.0%	$162.07	-
7	AZNAstrazeneca PLC	2.03%	$3.4B	-0.7%	$189.62	$162.03 -14.6%
8	NVDANvidia Corporation	2.02%	$3.4B	-0.6%	$200.09	$217.23 +8.6%

316 more on a paid plan

Unlock the full portfolio and quarterly changes.

Unlock all 316 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 16, 2026.

Common questions

What stocks does PRIMECAP Management own?: As of Q2 2026, PRIMECAP Management reported 324 positions with a combined 13F value of $169.1B. Its largest stock positions are MU ($22.2B), LLY ($11.0B) and INTC ($10.5B).
How often does PRIMECAP Management update its portfolio?: PRIMECAP Management files a 13F with the SEC every quarter, due 45 days after quarter end. The latest covers Q2 2026 and was filed Aug 14, 2026. The next one is due by Nov 16, 2026.
What does PRIMECAP Management's 13F leave out?: A 13F lists long positions in US-listed stocks and some options held on the last day of a quarter. It leaves out short positions, most bonds, holdings not listed in the US and anything bought or sold since the quarter ended.
Where does PRIMECAP Management's portfolio data come from?: From the 13F filings PRIMECAP Management makes to the SEC, available on EDGAR. Each quarter shows how positions changed from the one before.

Primecap Management Co

Last 4 years · filing-date model

New FDXF and exited CCL in Q2 2026.

Disclosed changes

Common questions

Primecap Management Co

Last 4 years · filing-date model

New FDXF and exited CCL in Q2 2026.

Disclosed changes

Common questions