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Calamos Advisors LLC

Position in COST — Costco Wholesale Corp /New

CIK 1316507 NAPERVILLE, IL

Position in COST

as of Jun 30, 2026 · filed Jul 31, 2026
Position Value
$75,215,529
-$15,465,579 QoQ
Shares Held
80,404
-11.6% QoQ
Ownership
0.018%
of shares outstanding
% of Portfolio
0.43%
of 13F equity value
Holder Rank
#309
of 4,178 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in COST Over Time

Shares Held

Position Value (USD)

Derivatives in COST

reported options exposure · as of Jun 30, 2026
CallValue
$1,309,658
CallShares
1,400
PutValue
$0
PutShares
0

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Discount Stores

Consumer Defensive · as of Jun 30, 2026

Calamos Advisors LLC holds $300,787,472 across 6 Discount Stores names. COST ranks #2 (25.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
2 COST
Costco Wholesale Corp /New
This page
80,404 $75,215,529

All Filings in COST

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33 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $75,215,529 80,404
2026-06-30 $1,309,658 1,400
2026-03-31 $1,594,288 1,600
2026-03-31 $90,681,108 91,006
2025-12-31 $1,810,914 2,100
2025-12-31 $75,966,117 88,093
2025-09-30 $1,851,260 2,000
2025-09-30 $88,517,996 95,630
2025-06-30 $104,274,339 105,334
2025-06-30 $989,940 1,000
2025-03-31 $472,890 500
2025-03-31 $99,578,338 105,287
2024-12-31 $98,579,656 107,588
2024-09-30 $95,519,870 107,747
2024-06-30 $92,434,712 108,748
2024-03-31 $81,255,993 110,910
2023-12-31 $74,106,521 112,269
2023-09-30 $64,213,353 113,660
2023-06-30 $59,105,509 109,784
2023-03-31 $54,516,079 109,719
2022-12-31 $365,200 800
2022-12-31 $53,781,634 117,813
2022-09-30 $63,774,396 135,038
2022-06-30 $64,700,882 134,996
2022-03-31 $89,817,052 155,973
2021-12-31 $84,112,702 148,164
2021-09-30 $65,420,866 145,590
2021-06-30 $48,492,919 122,559
2021-03-31 $38,124,941 108,162
2020-12-31 $39,893,843 105,881
2020-09-30 $40,693,650 114,630
2020-06-30 $29,136,055 96,092
2020-03-31 $30,679,702 107,599