13F Filings/PRIMECAP MANAGEMENT CO/CA/

PRIMECAP MANAGEMENT CO/CA/

Institutional ManagerCIK0000763212LocationPASADENA, CA 91105, United States

Long U.S. equity positions disclosed to the SEC on Form 13F-HR.

Latest filingQ2 2026Quarter ended30 Jun 2026Filed14 Aug 2026
Firm profile · Form ADV
SEC adviser registration

PRIMECAP Management Company provides investment management services as an independent investment advisory firm established in 1983. The firm manages equity portfolios for various clients, including employee benefit and pension plans, endowments, foundations, and mutual funds for the Vanguard Group. PRIMECAP's goal is to provide superior long-term investment results and satisfy client objectives, viewing themselves as "stock pickers."Summarised from the firm’s Form ADV Part 2A brochure.

CRD
105516 · 801-19765
Portfolio Turnover
5%
Of book traded, QoQ
Positions
324
Long U.S. equities
Top 10 Concentration
43%
Of reported value
QoQ Change
$42.1B
Value change
Assets under management
Form ADV RAUM · client mix · 13F over time
Regulatory AUM
$139.3B
Form ADV, as of Mar 2026
● 100% discretionary ($139.3B)
By client type
Investment companies: $133.5B (95.8%) · 2 clients
Investment companies
$133.5B · 96%
Sovereign wealth funds: $2.8B (2.0%) · 1 clientsPooled investment vehicles: $1.3B (0.9%) · 1 clientsPension & profit-sharing plans: $1.2B (0.9%) · 5 clientsCharitable organizations: $612M (0.4%) · 4 clients
13F AUM over time
$169.1B
Q2 ’26 · 13F AUM
▲ 142%
53 quarters
Reported Holdings
Q2 2026 · upgrade to Pro for past quarters
↗
★ Position spotlightMUMICRON TECHNOLOGY INC · 13.1% of bookThis highlighted stock and its 1Y chart are public
Loading position history…
Security⇅Shares⇅Market Value▼Est. Cost⇅Last Px⇅Est. Return⇅% Portfolio⇅Δ Shares⇅Action⇅
MICRON TECHNOLOGY INC
MU· Information Technology
19.22MSH$22.2B~$1154.29$966.78▼16.2%13.1%▼ 12.1%Reduced
ELI LILLY & CO
LLY· Health Care
9.17MSH$11.0B~$1199.43$1255.40▲4.7%6.5%▼ 0.5%Reduced
INTEL CORP
INTC· Information Technology
75.25MSH$10.5B~$139.63$90.07▼35.5%6.2%▼ 0.7%Reduced
KLA CORP
KLAC· Information Technology
20.54MSH$6.2B~$301.71$183.99▼39.0%3.7%▲ 742.5%Added
ALPHABET INC
GOOGL· Communication Services
14.86MSH$5.3B~$357.37$344.82▼3.5%3.1%▼ 0.9%Reduced
FLEX LTD
23.36MSH$3.8B~$162.07——2.2%▼ 8.0%Reduced
ASTRAZENECA PLC
18.10MSH$3.4B~$189.62——2.0%▼ 0.7%Reduced
NVIDIA CORPORATION
NVDA· Information Technology
17.08MSH$3.4B~$200.09$214.72▲7.3%2.0%▼ 0.6%Reduced
BIOGEN INC
BIIB· Health Care
15.15MSH$3.3B~$216.06$216.78▲0.3%1.9%▲ 2.7%Added
AMAZON COM INC
AMZN· Consumer Discretionary
11.96MSH$2.9B~$238.34$258.63▲8.5%1.7%▼ 1.2%Reduced
MUMICRON TECHNOLOGY INCReduced
$22.2B· 13.1%· 19.22M SH· ▼ 12.1%· cost $1154.29· last $966.78· ▼16.2%
Information Technology · COM · SOLE
LLYELI LILLY & COReduced
$11.0B· 6.5%· 9.17M SH· ▼ 0.5%· cost $1199.43· last $1255.40· ▲4.7%
Health Care · COM · SOLE
INTCINTEL CORPReduced
$10.5B· 6.2%· 75.25M SH· ▼ 0.7%· cost $139.63· last $90.07· ▼35.5%
Information Technology · COM · SOLE
KLACKLA CORPAdded
$6.2B· 3.7%· 20.54M SH· ▲ 742.5%· cost $301.71· last $183.99· ▼39.0%
Information Technology · COM NEW · SOLE
GOOGLALPHABET INCReduced
$5.3B· 3.1%· 14.86M SH· ▼ 0.9%· cost $357.37· last $344.82· ▼3.5%
Communication Services · CAP STK CL A · SOLE
FLEX LTDReduced
$3.8B· 2.2%· 23.36M SH· ▼ 8.0%· cost $162.07
ORD · SOLE
ASTRAZENECA PLCReduced
$3.4B· 2.0%· 18.10M SH· ▼ 0.7%· cost $189.62
ORD · SOLE
NVDANVIDIA CORPORATIONReduced
$3.4B· 2.0%· 17.08M SH· ▼ 0.6%· cost $200.09· last $214.72· ▲7.3%
Information Technology · COM · SOLE
BIIBBIOGEN INCAdded
$3.3B· 1.9%· 15.15M SH· ▲ 2.7%· cost $216.06· last $216.78· ▲0.3%
Health Care · COM · SOLE
AMZNAMAZON COM INCReduced
$2.9B· 1.7%· 11.96M SH· ▼ 1.2%· cost $238.34· last $258.63· ▲8.5%
Consumer Discretionary · COM · SOLE
1–10 of 324
1 / 33
Sector Breakdown
Q2 2026
Information Technology39.0% · $66.0B
Health Care18.7% · $31.7B
Industrials11.5% · $19.4B
Consumer Discretionary8.1% · $13.8B
Unclassified7.2% · $12.2B
Financials6.6% · $11.1B
Communication Services6.0% · $10.2B
Other2.8% · $4.7B
← All 13F filings