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Livermore
Livermore
ZHEN

Calamos Advisors LLC

SEC CIK
0001316507
Latest filing
Jul 31, 2026

COST holding history

Costco Wholesale Corp in every 13F filed by Calamos Advisors LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

COST overviewAll 13F holders of COSTFull Q2 2026 holdings

Shares (Q2 2026)
80,404
Value
$75.2M
% of portfolio
0.3%
Quarters held
22
Since Q1 2021
Holdings of COST by Calamos Advisors LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202680,404$75.2M0.3%−10,602−11.6%ReducedHolders
Q1 202691,006$90.7M0.4%+2,913+3.3%AddedHolders
Q4 202588,093$76.0M0.3%−7,537−7.9%ReducedHolders
Q3 202595,630$88.5M0.4%−9,704−9.2%ReducedHolders
Q2 2025105,334$104.3M0.4%+470.0%AddedHolders
Q1 2025105,287$99.6M0.5%−2,301−2.1%ReducedHolders
Q4 2024107,588$98.6M0.5%−159−0.1%ReducedHolders
Q3 2024107,747$95.5M0.4%−1,001−0.9%ReducedHolders
Q2 2024108,748$92.4M0.4%−2,162−1.9%ReducedHolders
Q1 2024110,910$81.3M0.4%−1,359−1.2%ReducedHolders
Q4 2023112,269$74.1M0.4%−1,391−1.2%ReducedHolders
Q3 2023113,660$64.2M0.3%+3,876+3.5%AddedHolders
Q2 2023109,784$59.1M0.3%+65+0.1%AddedHolders
Q1 2023109,719$54.5M0.3%−8,094−6.9%ReducedHolders
Q4 2022117,813$53.8M0.3%−17,225−12.8%ReducedHolders
Q3 2022135,038$63.8M0.3%+420.0%AddedHolders
Q2 2022134,996$64.7M0.3%−20,977−13.4%ReducedHolders
Q1 2022155,973$89.8M0.3%+7,809+5.3%AddedHolders
Q4 2021148,164$84.1M0.3%+2,574+1.8%AddedHolders
Q3 2021145,590$65.4M0.3%+23,031+18.8%AddedHolders
Q2 2021122,559$48.5M0.2%+14,397+13.3%AddedHolders
Q1 2021108,162$38.1M0.2%––Holders

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