Costco Wholesale Corporation
US ˙ NasdaqGS ˙ US22160K1051

SecurityCOST / Costco Wholesale Corporation
InstitutionCtc Llc
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Ctc Llc ownership in COST / Costco Wholesale Corporation

On May 21, 2026 - Ctc Llc filed a 13F-HR form disclosing ownership of 0 shares of Costco Wholesale Corporation (US:COST) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 5,307 shares of Costco Wholesale Corporation. The current value of the position is $0 USD.

Ctc Llc has a history of taking positions in derivatives of the underlying security (COST) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

COST / Costco Wholesale Corporation Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-21 2026-03-31 13F COSTCO WHSL CORP COM 22160K105 0 -100.00 0
2026-02-18 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 5,307 -1,001 -15.87 4,576 -21.62 0.0022
2025-12-15 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 6,308 -120 -1.87 5,839 -8.25 0.0029
2025-08-15 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 6,428 -6,317 -49.56 6,363 -47.21 0.0038
2025-05-16 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 12,745 -8,826 -40.92 12,054 -39.02 0.0085
2025-02-19 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 21,571 552 2.63 19,765 6.07 0.0121
2024-11-15 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 21,019 20,093 2,169.87 18,634 2,267.60 0.0108
2024-08-09 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 926 -40,588 -97.77 787 -97.41 0.0005
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 41,514 41,514 30,414 0.0157
2024-02-06 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 0 -129,509 -100.00 0 -100.00
2023-10-31 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 129,509 94,846 273.62 73,167 292.09 0.0422
2023-08-04 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 34,663 2,969 9.37 18,662 19.81 0.0097
2023-05-22 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 31,694 31,694 15,577 0.0092
2014-01-31 2013-12-31 13F COSTCO WHSL CORP COM 22160K105 0 -6,125 -100.00 0 -100.00
2013-10-24 2013-09-30 13F COSTCO WHSL CORP COM 22160K105 6,125 2,843 86.62 705 94.75 0.0178
2013-07-30 2013-06-30 13F COSTCO WHSL CORP COM 22160K105 3,282 3,282 362 0.0282
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-21 2026-03-31 13F COSTCO WHSL CORP COM Call 0 -100.00 0 n/a n/a n/a
2026-02-18 2025-12-31 13F COSTCO WHSL CORP COM Call 54 0.00 4,657 -6.84 n/a n/a n/a
2025-12-15 2025-09-30 13F COSTCO WHSL CORP COM Call 54 -99.00 4,998 -6.49 n/a n/a n/a
2025-08-15 2025-06-30 13F COSTCO WHSL CORP COM Call 5,400 -53.45 5,346 -51.28 n/a n/a n/a
2025-05-16 2025-03-31 13F COSTCO WHSL CORP COM Call 11,600 -71.22 10,971 -70.29 n/a n/a n/a
2025-02-19 2024-12-31 13F COSTCO WHSL CORP COM Call 40,300 8,776.65 36,926 -8.26 n/a n/a n/a
2024-11-15 2024-09-30 13F COSTCO WHSL CORP COM Call 454 -53.05 40,248 -51.03 n/a n/a n/a
2024-08-09 2024-06-30 13F COSTCO WHSL CORP COM Call 967 -42.41 82,194 -33.18 n/a n/a n/a
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM Call 1,679 -36.57 123,009 -29.60 n/a n/a n/a
2024-02-06 2023-12-31 13F COSTCO WHSL CORP COM Call 2,647 42.54 174,723 66.54 n/a n/a n/a
2023-10-31 2023-09-30 13F COSTCO WHSL CORP COM Call 1,857 -57.04 104,913 -54.92 n/a n/a n/a
2023-08-04 2023-06-30 13F COSTCO WHSL CORP COM Call 4,323 263.58 232,742 298.28 n/a n/a n/a
2023-05-22 2023-03-31 13F COSTCO WHSL CORP COM Call 1,189 21.45 58,437 132,709.09 n/a n/a n/a
2023-02-13 2022-12-31 13F COSTCO WHSL CORP COM Call 979 -5.32 45 -99.91 n/a n/a n/a
2022-10-11 2022-09-30 13F COSTCO WHSL CORP COM Call 1,034 -2.54 48,739 -3.94 n/a n/a n/a
2022-07-07 2022-06-30 13F COSTCO WHSL CORP COM Call 1,061 -8.77 50,740 -24.16 n/a n/a n/a
2022-05-09 2022-03-31 13F COSTCO WHSL CORP COM Call 1,163 66,904 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-21 2026-03-31 13F COSTCO WHSL CORP COM Put 0 -100.00 0 n/a n/a n/a
2026-02-18 2025-12-31 13F COSTCO WHSL CORP COM Put 126 0.00 10,865 -6.83 n/a n/a n/a
2025-12-15 2025-09-30 13F COSTCO WHSL CORP COM Put 126 -99.00 11,663 -6.50 n/a n/a n/a
2025-08-15 2025-06-30 13F COSTCO WHSL CORP COM Put 12,600 -57.14 12,473 -55.14 n/a n/a n/a
2025-05-16 2025-03-31 13F COSTCO WHSL CORP COM Put 29,400 -61.77 27,806 -60.54 n/a n/a n/a
2025-02-19 2024-12-31 13F COSTCO WHSL CORP COM Put 76,900 9,266.63 70,461 -3.19 n/a n/a n/a
2024-11-15 2024-09-30 13F COSTCO WHSL CORP COM Put 821 -33.68 72,783 -30.83 n/a n/a n/a
2024-08-09 2024-06-30 13F COSTCO WHSL CORP COM Put 1,238 -48.59 105,229 -40.35 n/a n/a n/a
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM Put 2,408 -7.06 176,417 3.15 n/a n/a n/a
2024-02-06 2023-12-31 13F COSTCO WHSL CORP COM Put 2,591 -26.93 171,027 -14.63 n/a n/a n/a
2023-10-31 2023-09-30 13F COSTCO WHSL CORP COM Put 3,546 -16.94 200,335 -12.84 n/a n/a n/a
2023-08-04 2023-06-30 13F COSTCO WHSL CORP COM Put 4,269 113.66 229,834 134.05 n/a n/a n/a
2023-05-22 2023-03-31 13F COSTCO WHSL CORP COM Put 1,998 143.36 98,198 265,297.30 n/a n/a n/a
2023-02-13 2022-12-31 13F COSTCO WHSL CORP COM Put 821 -42.02 37 -99.94 n/a n/a n/a
2022-10-11 2022-09-30 13F COSTCO WHSL CORP COM Put 1,416 17.12 66,783 15.47 n/a n/a n/a
2022-07-07 2022-06-30 13F COSTCO WHSL CORP COM Put 1,209 81.53 57,834 51.00 n/a n/a n/a
2022-05-09 2022-03-31 13F COSTCO WHSL CORP COM Put 666 38,300 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.