Skip to main content
Livermore
Livermore
ZHEN

Primecap Management Co

SEC CIK
0000763212
Latest filing
Aug 14, 2026

GLW holding history

Corning Inc in every 13F filed by Primecap Management Co, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

GLW overviewAll 13F holders of GLWFull Q2 2026 holdings

Shares (Q2 2026)
4,131,872
Value
$1.06B
% of portfolio
0.6%
Quarters held
22
Since Q1 2021
Holdings of GLW by Primecap Management Co, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 20264,131,872$1.06B0.6%−2,900−0.1%ReducedHolders
Q1 20264,134,772$562.2M0.4%−3,400−0.1%ReducedHolders
Q4 20254,138,172$362.3M0.3%−462,200−10.0%ReducedHolders
Q3 20254,600,372$377.4M0.3%−384,000−7.7%ReducedHolders
Q2 20254,984,372$262.1M0.2%−3,267,400−39.6%ReducedHolders
Q1 20258,251,772$377.8M0.3%−73,900−0.9%ReducedHolders
Q4 20248,325,672$395.6M0.3%−232,847−2.7%ReducedHolders
Q3 20248,558,519$386.4M0.3%−3,5000.0%ReducedHolders
Q2 20248,562,019$332.6M0.2%−160,100−1.8%ReducedHolders
Q1 20248,722,119$287.5M0.2%+43,300+0.5%AddedHolders
Q4 20238,678,819$264.3M0.2%−85,900−1.0%ReducedHolders
Q3 20238,764,719$267.1M0.2%−49,400−0.6%ReducedHolders
Q2 20238,814,119$308.8M0.3%−95,800−1.1%ReducedHolders
Q1 20238,909,919$314.3M0.3%−204,000−2.2%ReducedHolders
Q4 20229,113,919$291.1M0.3%−122,600−1.3%ReducedHolders
Q3 20229,236,519$268.0M0.3%−113,700−1.2%ReducedHolders
Q2 20229,350,219$294.6M0.3%−506,100−5.1%ReducedHolders
Q1 20229,856,319$363.8M0.3%−159,800−1.6%ReducedHolders
Q4 202110,016,119$372.9M0.3%−606,400−5.7%ReducedHolders
Q3 202110,622,519$387.6M0.3%−391,468−3.6%ReducedHolders
Q2 202111,013,987$450.5M0.3%−745,238−6.3%ReducedHolders
Q1 202111,759,225$511.6M0.4%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.