PRIMECAP MANAGEMENT CO/CA/

CIK 0000763212 · Q1 2026

13F Equity AUM

$127.0B

-3.9% QoQ

Positions

320

+1 QoQ

AUM Rank

#122

Top 1%

Skill Alpha (FF)

+3.0%/yr^ns

No Clear Edge

Rank #908 · Top 11%

vs S&P +1.0%/yr (unadj.)

Quarters Tracked

~13 years

Portfolio Concentration

Top 5: 21.6%Top 10: 33.5%Top 20: 50.3%

LLY6.7%

MU5.8%

GOOGL3.4%

AZN2.8%

KLAC2.8%

INTC2.6%

AMGN2.5%

NVDA2.4%

FDX2.3%

BIIB2.1%

Others (310)66.5%

HHI (Herfindahl-Hirschman Index) measures portfolio concentration. Low (<1500) = diversified, Moderate (1500-2500), High (>2500) = concentrated bets.

Sector Allocation

Technology31.0%

Healthcare25.6%

Industrials11.7%

Consumer Cyclical10.7%

Financial Services8.3%

Communication Services7.2%

Energy2.1%

Other3.3%

Portfolio weight by GICS sector based on latest 13F filing. Sectors below 2% are grouped as “Other.”

Position Sizing

Positions: 320Median: 0.07%Avg: 0.31%

0–0.5%

274(26.4%)

0.5–1%

18(14.0%)

1–3%

25(43.8%)

3–5%

1(3.4%)

5%+

2(12.5%)

Count of positions per weight bucket — (%) = combined portfolio weight

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Portfolio Overlap

Shared: 320Unique: 0vs 20 funds

4.4%Low

320

Fund positions

7,299

Consensus CUSIPs

Jaccard similarity of this fund’s portfolio vs the consensus of top 20 funds by AUM. Low (<15%) = contrarian, Moderate (15-40%), High (>40%) = follows the crowd.

Most Similar Funds

Top 9 benchmark funds with highest portfolio overlap (Jaccard similarity)

BlackRock, Inc.

MORGAN STANLEY

BANK OF AMERICA CORP /DE/

6.6%

GEODE CAPITAL MANAGEMENT, LLC

STATE STREET CORP

9.1%

VANGUARD CAPITAL MANAGEMENT LLC

8.9%

JPMORGAN CHASE & CO

6.2%

FMR LLC

10.3%

VANGUARD PORTFOLIO MANAGEMENT LLC

10.4%

Jaccard similarity per fund: shared CUSIPs / (fund A + fund B − shared). Higher values indicate more similar portfolios.

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Position Changes This Quarter

New9Increased75Decreased179Exited8

New Positions

AZN2.8%

+18.2M

WM0.1%

+278K

LHX0.0%

+143K

PVLA0.0%

+195K

FITB0.0%

+196K

SNDK0.0%

+400

XEL0.0%

+67K

ITT0.0%

+9K

WMG0.0%

+17K

Increased

ERIC0.3%

+10.9M(+41%)

GTLB0.1%

+6.1M(+530%)

7HP0.3%

+3.8M(+22%)

PYPL0.4%

+1.9M(+23%)

BSX1.6%

+1.4M(+5%)

INDI0.1%

+1.3M(+4%)

ADBE0.9%

+1.1M(+29%)

CARR0.2%

+921K(+32%)

XMTR0.2%

+813K(+14%)

BA0.1%

+787K(+8646%)

Decreased

MU5.8%

-2,920,732(-12%)

HPE0.3%

-1,983,637(-10%)

QCOM0.1%

-1,632,497(-70%)

NFE0.0%

-1,520,800(-74%)

RIG0.0%

-1,411,680(-35%)

FLEX1.3%

-1,318,643(-5%)

NWL0.0%

-1,183,553(-14%)

WFC0.5%

-637,170(-8%)

FIS0.0%

-628,800(-74%)

CSX0.1%

-557,100(-25%)

Exited

-36,915,261

-125,160

-30,500

-119,750

-142,915

-65,556

-2,600

-34,300

Quarter-over-quarter changes compared to prior 13F filing. New = first appearance; Exited = no longer held.

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Holdings

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