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Asset manager

Primecap Management Co

13F for the quarter to June 30, 2026, filed August 14, 2026 · SEC CIK 763212

Reported value
$169.1bn
97% in companies we cover
Positions we cover
311
Largest MU 13.1%
Copy, a year
+16.7%
S&P 500 +14.1%
Copy Sharpe ratio
0.81
S&P 500 0.78

How copying its 13F would have done

$10.0k$20.0k$40.0k$80.0k 2013201520172019202120232025 $77.0k$57.0k
CopyS&P 500 $10,000 copying Primecap Management Co's filed holdings in companies we cover from August 16, 2013, buying on the first trading day after each 13F was filed and holding until the next, against the S&P 500 (total return). Marked weekly, log scale. Before costs and taxes; misses trading within each quarter and anything 13F does not show (shorts, cash, bonds, non-US holdings).

Biggest drop −34.1% (S&P 500 −31.8%); beta 1.10; alpha +1.5% a year (t = 0.82); last 12 months +25.8% against +12.1%.

Reported value by quarter

Primecap Management Co: 13F reported value Total value of all positions in each quarter's 13F, as filed (values before 2023 were filed in thousands of dollars and are converted).
$0 $50T $100T $150T Reported value, 2013-06-30: $69.9B Reported value, 2013-09-30: $76B Reported value, 2013-12-31: $83.2B Reported value, 2014-03-31: $88.4B Reported value, 2014-06-30: $91.3B Reported value, 2014-09-30: $93.5B Reported value, 2014-12-31: $98.7B Reported value, 2015-03-31: $102.4B Reported value, 2015-06-30: $101.7B Reported value, 2015-09-30: $90.1B Reported value, 2015-12-31: $97.8B Reported value, 2016-03-31: $96.4B Reported value, 2016-06-30: $93.9B Reported value, 2016-09-30: $100.2B Reported value, 2016-12-31: $101.6B Reported value, 2017-03-31: $110.2B Reported value, 2017-06-30: $116.4B Reported value, 2017-09-30: $120.8B Reported value, 2017-12-31: $130.3B Reported value, 2018-03-31: $133.3B Reported value, 2018-06-30: $134.9B Reported value, 2018-09-30: $148.1B Reported value, 2018-12-31: $123.4B Reported value, 2019-03-31: $135.9B Reported value, 2019-06-30: $135.2B Reported value, 2019-09-30: $125B Reported value, 2019-12-31: $137.9B Reported value, 2020-03-31: $102B Reported value, 2020-06-30: $116.5B Reported value, 2020-09-30: $121.2B Reported value, 2020-12-31: $134.5B Reported value, 2021-03-31: $143.4B Reported value, 2021-06-30: $148.8B Reported value, 2021-09-30: $141.7B Reported value, 2021-12-31: $144.5B Reported value, 2022-03-31: $132.6B Reported value, 2022-06-30: $111.9B Reported value, 2022-09-30: $103.3B Reported value, 2022-12-31: $109.2T Reported value, 2023-03-31: $114.7B Reported value, 2023-06-30: $119.7B Reported value, 2023-09-30: $118.5B Reported value, 2023-12-31: $126.3B Reported value, 2024-03-31: $134.1B Reported value, 2024-06-30: $138.1B Reported value, 2024-09-30: $136B Reported value, 2024-12-31: $129.1B Reported value, 2025-03-31: $121B Reported value, 2025-06-30: $126.2B Reported value, 2025-09-30: $130.6B Reported value, 2025-12-31: $132.1B Reported value, 2026-03-31: $127B Reported value, 2026-06-30: $169.1B 2013-06-30 2016-03-31 2018-12-31 2021-09-30 2026-06-30 $169.1B
View chart data
Period Reported value
2013-06-30 $69.9B
2013-09-30 $76B
2013-12-31 $83.2B
2014-03-31 $88.4B
2014-06-30 $91.3B
2014-09-30 $93.5B
2014-12-31 $98.7B
2015-03-31 $102.4B
2015-06-30 $101.7B
2015-09-30 $90.1B
2015-12-31 $97.8B
2016-03-31 $96.4B
2016-06-30 $93.9B
2016-09-30 $100.2B
2016-12-31 $101.6B
2017-03-31 $110.2B
2017-06-30 $116.4B
2017-09-30 $120.8B
2017-12-31 $130.3B
2018-03-31 $133.3B
2018-06-30 $134.9B
2018-09-30 $148.1B
2018-12-31 $123.4B
2019-03-31 $135.9B
2019-06-30 $135.2B
2019-09-30 $125B
2019-12-31 $137.9B
2020-03-31 $102B
2020-06-30 $116.5B
2020-09-30 $121.2B
2020-12-31 $134.5B
2021-03-31 $143.4B
2021-06-30 $148.8B
2021-09-30 $141.7B
2021-12-31 $144.5B
2022-03-31 $132.6B
2022-06-30 $111.9B
2022-09-30 $103.3B
2022-12-31 $109.2T
2023-03-31 $114.7B
2023-06-30 $119.7B
2023-09-30 $118.5B
2023-12-31 $126.3B
2024-03-31 $134.1B
2024-06-30 $138.1B
2024-09-30 $136B
2024-12-31 $129.1B
2025-03-31 $121B
2025-06-30 $126.2B
2025-09-30 $130.6B
2025-12-31 $132.1B
2026-03-31 $127B
2026-06-30 $169.1B

Holdings and moves

CompanyShare of portfolioValueSharesChange in shares
MUMicron Technology13.12%$22.2bn19.22M−12.1% Reduced
LLYLilly (Eli)6.51%$11.0bn9.17M−0.5% Reduced
INTCIntel6.21%$10.5bn75.25M−0.7% Reduced
KLACKLA Corporation3.66%$6.2bn20.54M+742.5% Added
GOOGLAlphabet Inc. (Class A)3.14%$5.3bn14.86M−0.9% Reduced
FLEXFlex Ltd.2.24%$3.8bn23.36M−8.0% Reduced
AZNAstrazeneca PLC2.03%$3.4bn18.10M−0.7% Reduced
NVDANVIDIA Corporation2.02%$3.4bn17.08M−0.6% Reduced
BIIBBiogen1.94%$3.3bn15.15M+2.7% Added
AMZNAmazon1.69%$2.9bn11.96M−1.2% Reduced
MSFTMicrosoft Corporation1.57%$2.7bn7.14M−1.7% Reduced
TSLATesla, Inc.1.52%$2.6bn6.10M−0.4%
FDXFedEx1.51%$2.6bn8.16M−1.8% Reduced
TXNTexas Instruments1.50%$2.5bn8.51M−11.8% Reduced
LUVSouthwest Airlines1.48%$2.5bn48.80M+3.7% Added
AMGNAmgen1.45%$2.4bn6.76M−23.9% Reduced
SCHWCharles Schwab Corporation1.37%$2.3bn25.12M+7.2% Added
UALUnited Airlines Holdings1.32%$2.2bn16.46M+4.5% Added
BSXBoston Scientific1.27%$2.2bn50.52M+55.3% Added
ROSTRoss Stores1.15%$1.9bn9.10M−0.7% Reduced
BABAAlibaba Group Holding Ltd1.06%$1.8bn18.61M−0.6% Reduced
DALDelta Air Lines0.97%$1.6bn17.52M−0.2%
VVisa Inc.0.87%$1.5bn4.27M+5.1% Added
BMYBristol Myers Squibb0.85%$1.4bn24.92M−0.2%
TJXTJX Companies0.85%$1.4bn9.48M−1.2% Reduced
ONCBeone Medicines Ltd.0.84%$1.4bn5.01M+0.7% Added
RJFRaymond James Financial0.83%$1.4bn9.24M−1.1% Reduced
NTAPNetApp0.82%$1.4bn9.02M−0.5%
GSKGSK plc0.78%$1.3bn25.18M−0.1%
AALAmerican Airlines Group Inc.0.76%$1.3bn70.73M+44.4% Added
BIDUBaidu, Inc.0.74%$1.3bn11.01M−0.4%
ADIAnalog Devices0.73%$1.2bn3.13M−0.2%
JBLJabil0.72%$1.2bn3.17M−3.5% Reduced
COPConocoPhillips0.71%$1.2bn11.59M+0.1%
ELANElanco Animal Health Inc0.66%$1.1bn45.45M−0.9% Reduced
JPMJPMorgan Chase0.66%$1.1bn3.38M−0.6% Reduced
ADBEAdobe Inc.0.63%$1.1bn5.23M+10.5% Added
NTRSNorthern Trust0.63%$1.1bn6.10M−6.8% Reduced
GLWCorning Inc.0.62%$1.1bn4.13M−0.1%
TMOThermo Fisher Scientific0.59%$993.8m1.98M0.0%
CATCaterpillar Inc.0.55%$928.3m871.7K−0.1%
MRVLMarvell Technology0.49%$821.6m2.76M−7.3% Reduced
BMRNBiomarin Pharmaceutical Inc0.48%$812.0m14.19M0.0%
NXTNextpower Inc.0.47%$796.9m6.69M−1.1% Reduced
ORCLOracle Corporation0.47%$789.4m5.39M−5.1% Reduced
HPEHewlett Packard Enterprise0.46%$773.2m17.14M−0.5% Reduced
AMATApplied Materials0.45%$754.0m1.04M−11.2% Reduced
IEXIDEX Corporation0.44%$749.0m3.30M−0.1%
ASMLAsml Holding NV0.41%$699.4m351.6K−0.4%
DISThe Walt Disney Company0.40%$675.8m7.02M+12.6% Added
RCLRoyal Caribbean Group0.40%$669.8m2.11M−10.1% Reduced
XMTRXometry, Inc.0.38%$640.5m6.64M+2.2% Added
ILMNIllumina, Inc.0.36%$618.0m3.51M+70.0% Added
ACMAecom0.36%$613.3m8.79M+1.6% Added
FDXFFedEx Freight0.36%$611.3m4.05MNew
AMDAdvanced Micro Devices0.36%$608.6m1.05M−0.2%
JJacobs Solutions0.34%$575.3m4.57M+1.1% Added
CSCOCisco0.34%$568.3m4.84M0.0%
ENTGEntegris Inc0.33%$562.1m3.13M−0.6% Reduced
WFCWells Fargo0.33%$554.7m6.71M−13.1% Reduced
TDGTransDigm Group0.32%$546.4m410.2K0.0%
HPQHP Inc.0.32%$546.0m24.89M+15.9% Added
AAPLApple Inc.0.30%$509.5m1.76M0.0%
ERICEricsson LM Telephone Co0.27%$464.0m41.61M+11.0% Added
LINLinde plc0.27%$460.3m886.9K−0.2%
DLTRDollar Tree0.27%$455.8m3.77M+1.1% Added
FICOFair Isaac0.26%$433.5m362.8K+25.5% Added
GKOSGlaukos Corp0.25%$425.0m3.04M−9.8% Reduced
PYPLPayPal0.25%$422.1m9.78M−2.5% Reduced
CMECME Group0.25%$420.6m1.90M+4.7% Added
MATMattel Inc0.24%$409.5m29.51M−0.6% Reduced
USFDUS Foods Holding Corp.0.24%$407.0m3.98M+0.9% Added
SNPSSynopsys Inc0.24%$399.4m895.4K+8.9% Added
METAMeta Platforms0.24%$399.0m708.3K−8.5% Reduced
MKTXMarketaxess Holdings Inc0.23%$397.8m3.50M+4.7% Added
CWCurtiss Wright Corp0.23%$390.1m514.8K−4.1% Reduced
BAHBooz Allen Hamilton Holding Corp0.23%$388.1m6.40M+32.5% Added
CVXChevron Corporation0.22%$378.8m2.29M−0.3%
BNYBNY Mellon0.22%$376.5m2.60M+2.7% Added
DHRDanaher Corporation0.21%$359.8m1.89M+21.3% Added
ALBAlbemarle Corporation0.21%$358.1m2.65M−0.5%
MRSHMarsh McLennan0.21%$357.5m2.15M+199.0% Added
RYTMRhythm Pharmaceuticals, Inc.0.21%$351.8m3.17M−7.3% Reduced
BNTXBiontech SE0.21%$351.0m3.77M−0.6% Reduced
PANWPalo Alto Networks0.21%$347.8m1.02M−1.4% Reduced
LIVNLivanova PLC0.20%$342.8m4.17M−0.9% Reduced
NFLXNetflix0.20%$342.0m4.79M+8.6% Added
MAMastercard0.20%$336.2m654.7K+12.5% Added
WDCWestern Digital0.20%$329.9m516.4K−10.5% Reduced
ZBHZimmer Biomet0.19%$328.6m3.82M−2.3% Reduced
CCitigroup0.19%$326.6m2.33M−2.4% Reduced
NSCNorfolk Southern0.19%$324.9m1.03M0.0%
SYYSysco0.18%$313.5m3.75M+1.3% Added
EWEdwards Lifesciences0.18%$308.3m3.41M−0.4%
PFGCPerformance Food Group Co0.18%$305.1m2.73M+0.8% Added
INTUIntuit0.17%$289.7m1.11M+3.6% Added
MDBMongodb, Inc.0.17%$284.2m846.0K+0.4%
CARRCarrier Global0.17%$283.6m3.87M+0.7% Added
AVGOBroadcom0.17%$278.3m736.8K−0.9% Reduced
FORMFormfactor Inc0.16%$270.3m1.69M−5.5% Reduced
BURLBurlington Stores, Inc.0.16%$266.4m841.0K+6.1% Added
AMTMAmentum Holdings, Inc.0.15%$253.9m12.29M+1.7% Added
CVSCVS Health0.15%$246.8m2.39M−0.4%
SPCXSpace Exploration Technologies Corp0.14%$240.5m1.41MNew
TERTeradyne0.14%$235.1m485.8K−11.8% Reduced
GTLBGitlab Inc.0.14%$234.6m7.68M+5.3% Added
UPSUnited Parcel Service0.14%$230.7m2.15M0.0%
KMXCarmax Inc0.14%$230.5m4.36M0.0%
BABoeing0.13%$225.1m1.04M+30.7% Added
PGRProgressive Corporation0.13%$219.2m1.00M−0.2%
SYKStryker Corporation0.13%$213.4m677.9K+28.7% Added
UNPUnion Pacific Corporation0.13%$211.0m775.7K−5.8% Reduced
EBAYeBay Inc.0.12%$209.4m1.87M−0.2%
OKTAOkta, Inc.0.12%$206.9m1.52M−11.4% Reduced
KEYSKeysight Technologies0.12%$206.2m589.0K−0.3%
EOGEOG Resources0.12%$205.2m1.58M−1.1% Reduced
TRMBTrimble Inc.0.12%$200.4m3.92M−0.1%
AMEAmetek0.12%$199.2m823.2K0.0%
OLEDUniversal Display Corp \pa\0.11%$190.1m2.20M+0.4%
FLUTFlutter Entertainment plc0.11%$182.5m1.79M0.0%
STXSeagate Technology0.11%$182.2m188.8K−18.0% Reduced
AAgilent Technologies0.10%$176.3m1.33M−0.5%
BACBank of America0.10%$175.7m3.08M+11.6% Added
ALKAlaska AIR Group, Inc.0.10%$168.5m3.23M−0.7% Reduced
XPEVXpeng Inc.0.10%$165.7m12.52M−1.7% Reduced
SPOTSpotify Technology S.a.0.10%$165.3m360.1K+8.3% Added
DELLDell Technologies0.10%$164.7m381.7K+1.9% Added
XNCRXencor Inc0.10%$163.9m10.18M−1.5% Reduced
CCLCarnival Corporation0.09%$153.2m5.36MNew
CIENCiena0.09%$151.1m308.1K−29.7% Reduced
JBHTJ.B. Hunt0.09%$149.8m517.7K0.0%
PMPhilip Morris International0.09%$149.1m824.0K−4.7% Reduced
GRALGrail, Inc.0.09%$148.8m2.18M+18.2% Added
NTNXNutanix, Inc.0.09%$148.7m2.92M+3.2% Added
QQnity Electronics, Inc.0.09%$148.0m906.1K−6.6% Reduced
OTISOtis Worldwide0.09%$147.2m2.06M−1.8% Reduced
INDIIndie Semiconductor, Inc.0.08%$142.0m31.62M+1.8% Added
WHRWhirlpool Corp0.08%$141.8m3.60M−4.0% Reduced
GDGeneral Dynamics0.08%$137.6m388.4K−0.1%
LYVLive Nation Entertainment0.08%$133.2m727.2K−0.1%
ALKSAlkermes plc.0.08%$132.5m2.53M−0.4%
EVREvercore Inc.0.08%$128.4m376.1K+6.3% Added
ROKRockwell Automation0.07%$125.9m254.4K−0.1%
WSCWillscot Holdings Corp0.07%$122.8m4.25M−0.5% Reduced
XPOXPO, Inc.0.07%$116.7m568.3K0.0%
ADSKAutodesk, Inc.0.07%$116.7m600.1K−0.5%
ACLSAxcelis Technologies Inc0.07%$115.6m610.5K−7.3% Reduced
IMCRImmunocore Holdings plc0.07%$115.5m3.64M−1.5% Reduced
TXTTextron0.07%$111.7m1.22M−2.5% Reduced
ZMZoom Communications, Inc.0.06%$107.6m1.25M−0.1%
CompanyBought (value)Shares
KLACKLA Corporation$5.5bn18.10M
BSXBoston Scientific$767.9m17.99M
FDXFFedEx Freight$611.3m4.05M
AALAmerican Airlines Group Inc.$392.9m21.74M
ILMNIllumina, Inc.$254.5m1.45M
SPCXSpace Exploration Technologies Corp$240.5m1.41M
MRSHMarsh McLennan$237.9m1.43M
SCHWCharles Schwab Corporation$154.9m1.68M
CCLCarnival Corporation$153.2m5.36M
ADBEAdobe Inc.$101.7m496.3K
UALUnited Airlines Holdings$96.7m711.0K
BAHBooz Allen Hamilton Holding Corp$95.1m1.57M
LUVSouthwest Airlines$88.9m1.73M
FICOFair Isaac$88.2m73.8K
BIIBBiogen$85.8m397.0K

Change in shares on the previous quarter's 13F, valued at this quarter's reported price.

CompanySold (value)Shares
MUMicron Technology−$3.1bn−2.66M
AMGNAmgen−$766.7m−2.12M
TXNTexas Instruments−$339.7m−1.14M
FLEXFlex Ltd.−$328.1m−2.02M
GSGoldman Sachs−$154.2m−152.5K
AMATApplied Materials−$94.9m−131.2K
QCOMQualcomm−$86.2m−466.3K
WFCWells Fargo−$83.6m−1.01M
NTRSNorthern Trust−$77.9m−448.3K
RCLRoyal Caribbean Group−$75.4m−237.5K
INTCIntel−$71.4m−511.0K
MRVLMarvell Technology−$64.6m−216.7K
CIENCiena−$63.8m−130.0K
LLYLilly (Eli)−$60.6m−50.5K
DOWDow Inc.−$57.5m−2.10M

Change in shares on the previous quarter's 13F, valued at this quarter's reported price.

CompanyValue last quarterShares
FITBFifth Third Bancorp$9.1m196.3K
HCATHealth Catalyst, Inc.$432,331340.4K
MDTMedtronic$211,4272.4K
  • Technology43.4%
  • Health Care21.0%
  • Industrials11.8%
  • Consumer Discretionary8.4%
  • Financials7.0%
  • Communication Services5.1%
  • Energy1.3%
  • Consumer Staples1.1%
  • Materials0.7%
  • Real Estate0.1%
  • Utilities0.0%

Share of the value held in companies we cover, by sector.

PeriodCopy, a yearS&P 500SharpeS&P 500Biggest dropBeta
Whole backtestAugust 16, 2013 to November 2, 2026+16.7%+14.1%0.810.78−34.1%1.10
2018 onwardsJanuary 5, 2018 to November 2, 2026+14.3%+13.9%0.610.66−34.1%1.09
Last three yearsNovember 3, 2023 to November 2, 2026+25.2%+21.8%1.121.16−19.1%1.11
Last yearNovember 7, 2025 to November 2, 2026+26.4%+14.2%1.220.84−10.3%1.16

From SEC Form 13F data sets. A 13F lists long positions in US-listed shares at the quarter's end, filed up to 45 days later; it does not show shorts, cash, bonds, non-US holdings or trades within the quarter. Positions in companies outside our coverage are not listed here. Research, not investment advice.