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Primecap Management Co

Portfolio Profile

CIK: 0000763212 | PASADENA, CA

Investment Profile

Style

Growth

Turnover

Low

Orientation

Concentrated long-term
Investment Commentary

PRIMECAP Management employs an active, growth-oriented strategy with very low turnover, reflecting a long-term, conviction-driven philosophy. The portfolio is heavily concentrated, with the top 15 holdings representing 43.6% of assets, led by Eli Lilly at 6.7% and Micron Technology at 5.8%, indicating high confidence in select names across technology and healthcare. Sector allocation underscores a pronounced tilt toward Technology at 29.4% and Healthcare at 21.5%, together accounting for over half the fund, while no other sector exceeds 12%. This positioning reveals a disciplined focus on scalable, high-conviction bets in innovative industries, consistent with a patient, research-intensive approach that eschews short-term trading.

$169.1B
AUM
324
Positions
42.55%
Top 10 Conc.
61.57%
Top 25 Conc.

Top Holdings

#SecuritySharesValue% of Portfolio
1Micron Technology Inc(MU)19,217,236$22.2B13.12%
2ELI Lilly & Co(LLY)9,172,904$11.0B6.51%
3Intel Corp(INTC)75,250,958$10.5B6.21%
4KLA Corp(KLAC)20,536,730$6.2B3.66%

Sector Allocation

Latest filing, equity positions only

Technology40.05% · $67.7B
Healthcare20.29% · $34.3B
Industrials11.1% · $18.8B
Consumer Cyclical7.55% · $12.8B
Financial Services6.77% · $11.4B
Unclassified6.04% · $10.2B
Communication Services5.34% · $9.0B

AUM History

$118.5B | 331 pos.
$126.3B | 334 pos.
$134.1B | 335 pos.
$138.1B | 332 pos.
$136.0B | 336 pos.
$129.1B | 329 pos.
5
Alphabet Inc(GOOGL)
14,859,769
$5.3B
3.14%
6Flex LTD(FLEX)23,358,875$3.8B2.24%
7Astrazeneca PLC(AZN)18,095,178$3.4B2.03%
8Nvidia Corporation(NVDA)17,079,180$3.4B2.02%
9Biogen Inc(BIIB)15,154,606$3.3B1.94%
10Amazon COM Inc(AMZN)11,962,188$2.9B1.69%
Energy
1.24% · $2.1B
Consumer Defensive1.15% · $2.0B
Basic Materials0.38% · $637.7M
Real Estate0.07% · $110.8M
Utilities0.03% · $52.7M

Sector Rotation

Quarter-over-quarter weight changes

SectorPrev %Curr %Change
Technology29.37%40.05%+10.68%
Healthcare24.5%20.29%-4.21%
Consumer Cyclical10.12%7.55%-2.57%
Financial Services8.41%6.77%-1.64%
Industrials11.98%11.1%-0.88%
Communication Services6.15%5.34%-0.81%
Energy2.03%1.24%-0.79%
Unclassified5.26%6.04%+0.78%
Basic Materials0.76%0.38%-0.38%
Consumer Defensive1.33%1.15%-0.18%
Real Estate0.09%0.07%-0.02%
Utilities0.01%0.03%+0.02%

Cap Size Rotation

Quarter-over-quarter weight changes by market cap

Cap SizePrev %Curr %Change
Mega Cap39.34%45.74%+6.4%
Large Cap50.44%43.41%-7.03%
Unclassified5.26%6.04%+0.78%
Mid Cap4.34%4.22%-0.12%
Small Cap0.61%0.58%-0.03%
Micro Cap0.01%0.01%0%
$121.0B | 335 pos.
$126.2B | 333 pos.
$130.6B | 327 pos.
$132.1B | 319 pos.
$127.0B | 320 pos.
$169.1B | 324 pos.
Q3
23
Q4
23
Q1
24
Q2
24
Q3
24
Q4
24
Q1
25
Q2
25
Q3
25
Q4
25
Q1
26
Q2
26

Recent Activity

Quarter-over-quarter position changes

12
New
8
Closed
84
Increased
178
Decreased
50
Unchanged