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 filingQ1 2026Quarter ended31 Mar 2026Filed11 May 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
320
Long U.S. equities
Top 10 Concentration
33%
Of reported value
QoQ Change
$-5.1B
Value change
Assets under management
Form ADV RAUM · client mix · 13F over time
Regulatory AUM
$134.5B
Form ADV, as of Jul 2024
● 100% discretionary ($134.5B)
By client type
Investment companies: $125.2B (93.1%) · 2 clients
Investment companies
$125.2B · 93%
Pension & profit-sharing plans: $4.3B (3.2%) · 11 clientsSovereign wealth funds: $2.0B (1.5%) · 1 clientsPooled investment vehicles: $1.9B (1.4%) · 2 clientsCharitable organizations: $1.2B (0.9%) · 7 clients
13F AUM over time
$127.0B
Q1 ’26 · 13F AUM
▲ 82%
52 quarters
Sector Breakdown
Latest filing
Information Technology28.0% · $35.5B
Health Care22.4% · $28.5B
Industrials12.4% · $15.8B
Consumer Discretionary10.9% · $13.9B
Financials8.2% · $10.4B
Communication Services7.1% · $9.0B
Unclassified6.8% · $8.7B
Other4.1% · $5.2B
Reported Holdings
Q1 2026 · sign up free for past quarters
↗
★ Position spotlightLLYELI LILLY & CO · 6.7% of book
🔒
See how this position changed across every quarter
Multi-quarter 13F position history — shares held, buys & sells, and price over time — is a Pro feature. The latest snapshot below stays free.
Security⇅Shares⇅Market Value▼Est. Cost⇅Last Px⇅Est. Return⇅% Portfolio⇅Δ Shares⇅Action⇅
ELI LILLY & CO
LLY· Health Care
9.22MSH$8.5B~$919.77$1208.12▲31.4%6.7%▼ 0.5%Reduced
MICRON TECHNOLOGY INC
MU· Information Technology
21.87MSH$7.4B~$337.84$1132.33▲235.2%5.8%▼ 11.8%Reduced
ALPHABET INC
GOOGL· Communication Services
14.99MSH$4.3B~$287.56$337.39▲17.3%3.4%▼ 0.9%Reduced
ASTRAZENECA PLC
18.21MSH$3.6B~$197.22——2.8%NewNew
KLA CORP
KLAC· Information Technology
2.44MSH$3.6B~$1472.41$248.64▼83.1%2.8%▼ 15.2%Reduced
INTEL CORP
INTC· Information Technology
75.76MSH$3.3B~$44.13$128.32▲190.8%2.6%▼ 0.5%Reduced
AMGEN INC
AMGN· Health Care
8.87MSH$3.1B~$351.85$358.33▲1.8%2.5%▼ 0.3%Reduced
NVIDIA CORPORATION
NVDA· Information Technology
17.19MSH$3.0B~$174.40$192.53▲10.4%2.4%▼ 0.2%Reduced
FEDEX CORP
FDX· Industrials
8.30MSH$3.0B~$356.18$318.53▼10.6%2.3%▼ 2.5%Reduced
BIOGEN INC
BIIB· Health Care
14.76MSH$2.7B~$183.33$216.03▲17.8%2.1%▼ 0.0%Reduced
MICROSOFT CORP
MSFT· Information Technology
7.26MSH$2.7B~$370.17$372.97▲0.8%2.1%▼ 0.3%Reduced
AMAZON COM INC
AMZN· Consumer Discretionary
12.11MSH$2.5B~$208.27$232.69▲11.7%2.0%▼ 1.2%Reduced
ALIBABA GROUP HLDG LTD
BABA· Consumer Discretionary
18.72MSH$2.3B~$125.46$94.81▼24.4%1.8%▼ 1.3%Reduced
TESLA INC
TSLA· Consumer Discretionary
6.13MSH$2.3B~$371.75$379.71▲2.1%1.8%▼ 3.0%Reduced
SCHWAB CHARLES CORP
SCHW· Financials
23.44MSH$2.2B~$93.98$90.67▼3.5%1.7%▲ 0.7%Added
BOSTON SCIENTIFIC CORP
BSX· Health Care
32.53MSH$2.0B~$62.75$44.23▼29.5%1.6%▲ 4.6%Added
ROSS STORES INC
ROST· Consumer Discretionary
9.17MSH$2.0B~$216.63$213.26▼1.6%1.6%▼ 0.4%Reduced
TEXAS INSTRS INC
TXN· Information Technology
9.65MSH$1.9B~$194.14$285.43▲47.0%1.5%▼ 4.3%Reduced
SOUTHWEST AIRLS CO
LUV· Industrials
47.07MSH$1.8B~$37.57$51.91▲38.2%1.4%▼ 0.7%Reduced
FLEXTRONICS INTL LTD
25.38MSH$1.7B~$65.46——1.3%▼ 4.9%Reduced
LLYELI LILLY & COReduced
$8.5B· 6.7%· 9.22M SH· ▼ 0.5%· cost $919.77· last $1208.12· ▲31.4%
Health Care · COM · SOLE
MUMICRON TECHNOLOGY INCReduced
$7.4B· 5.8%· 21.87M SH· ▼ 11.8%· cost $337.84· last $1132.33· ▲235.2%
Information Technology · COM · SOLE
GOOGLALPHABET INCReduced
$4.3B· 3.4%· 14.99M SH· ▼ 0.9%· cost $287.56· last $337.39· ▲17.3%
Communication Services · CAP STK CL A · SOLE
ASTRAZENECA PLCNew
$3.6B· 2.8%· 18.21M SH· New· cost $197.22
ORD · SOLE
KLACKLA CORPReduced
$3.6B· 2.8%· 2.44M SH· ▼ 15.2%· cost $1472.41· last $248.64· ▼83.1%
Information Technology · COM NEW · SOLE
INTCINTEL CORPReduced
$3.3B· 2.6%· 75.76M SH· ▼ 0.5%· cost $44.13· last $128.32· ▲190.8%
Information Technology · COM · SOLE
AMGNAMGEN INCReduced
$3.1B· 2.5%· 8.87M SH· ▼ 0.3%· cost $351.85· last $358.33· ▲1.8%
Health Care · COM · SOLE
NVDANVIDIA CORPORATIONReduced
$3.0B· 2.4%· 17.19M SH· ▼ 0.2%· cost $174.40· last $192.53· ▲10.4%
Information Technology · COM · SOLE
FDXFEDEX CORPReduced
$3.0B· 2.3%· 8.30M SH· ▼ 2.5%· cost $356.18· last $318.53· ▼10.6%
Industrials · COM · SOLE
BIIBBIOGEN INCReduced
$2.7B· 2.1%· 14.76M SH· ▼ 0.0%· cost $183.33· last $216.03· ▲17.8%
Health Care · COM · SOLE
MSFTMICROSOFT CORPReduced
$2.7B· 2.1%· 7.26M SH· ▼ 0.3%· cost $370.17· last $372.97· ▲0.8%
Information Technology · COM · SOLE
AMZNAMAZON COM INCReduced
$2.5B· 2.0%· 12.11M SH· ▼ 1.2%· cost $208.27· last $232.69· ▲11.7%
Consumer Discretionary · COM · SOLE
BABAALIBABA GROUP HLDG LTDReduced
$2.3B· 1.8%· 18.72M SH· ▼ 1.3%· cost $125.46· last $94.81· ▼24.4%
Consumer Discretionary · SPONSORED ADS · SOLE
TSLATESLA INCReduced
$2.3B· 1.8%· 6.13M SH· ▼ 3.0%· cost $371.75· last $379.71· ▲2.1%
Consumer Discretionary · COM · SOLE
SCHWSCHWAB CHARLES CORPAdded
$2.2B· 1.7%· 23.44M SH· ▲ 0.7%· cost $93.98· last $90.67· ▼3.5%
Financials · COM · SOLE
BSXBOSTON SCIENTIFIC CORPAdded
$2.0B· 1.6%· 32.53M SH· ▲ 4.6%· cost $62.75· last $44.23· ▼29.5%
Health Care · COM · SOLE
ROSTROSS STORES INCReduced
$2.0B· 1.6%· 9.17M SH· ▼ 0.4%· cost $216.63· last $213.26· ▼1.6%
Consumer Discretionary · COM · SOLE
TXNTEXAS INSTRS INCReduced
$1.9B· 1.5%· 9.65M SH· ▼ 4.3%· cost $194.14· last $285.43· ▲47.0%
Information Technology · COM · SOLE
LUVSOUTHWEST AIRLS COReduced
$1.8B· 1.4%· 47.07M SH· ▼ 0.7%· cost $37.57· last $51.91· ▲38.2%
Industrials · COM · SOLE
FLEXTRONICS INTL LTDReduced
$1.7B· 1.3%· 25.38M SH· ▼ 4.9%· cost $65.46
ORD · SOLE
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