코스트코 도매공사
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionGts Securities Llc
Latest Disclosed Ownership3,082 shares
Latest Disclosed Value $ 3,070,997
Gts Securities Llc ownership in COST / Costco Wholesale Corporation

On May 14, 2026 - Gts Securities Llc filed a 13F-HR form disclosing ownership of 3,082 shares of Costco Wholesale Corporation (MX:COST) valued at $3,070,997 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 4,276 shares of Costco Wholesale Corporation. This represents a change in shares of -27.92% during the quarter.

Gts Securities 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.

MX: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)
2026-05-14 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 3,082 -1,194 -27.92 3,071 -16.73 0.1086
2026-02-13 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 4,276 -5,908 -58.01 3,687 -60.88 0.1258
2025-11-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 10,184 7,985 363.12 9,427 333.18 0.3620
2025-08-08 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 2,199 -3,760 -63.10 2,177 -61.38 0.0971
2025-05-15 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 5,959 198 3.44 5,636 6.76 0.2439
2025-02-18 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 5,761 4,252 281.78 5,279 294.76 0.2571
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 1,509 -10,648 -87.59 1,338 -87.06 0.0029
2024-08-14 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 12,157 -1,402 -10.34 10,333 4.03 0.0220
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 13,559 -25,815 -65.56 9,934 -61.78 0.0182
2024-02-15 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 39,374 6,138 18.47 25,990 38.41 0.0443
2023-11-15 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 33,236 -8,776 -20.89 18,777 -16.98 0.0337
2023-08-16 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 42,012 42,012 22,618 0.7146
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
(%)
2025-02-18 2024-12-31 13F COSTCO WHSL CORP COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM Call 149,900 4.83 132,889 9.33 n/a n/a n/a
2024-08-14 2024-06-30 13F COSTCO WHSL CORP COM Call 143,000 -24.46 121,549 -12.36 n/a n/a n/a
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM Call 189,300 -27.42 138,687 -19.44 n/a n/a n/a
2024-02-15 2023-12-31 13F COSTCO WHSL CORP COM Call 260,800 10.37 172,149 28.95 n/a n/a n/a
2023-11-15 2023-09-30 13F COSTCO WHSL CORP COM Call 236,300 133,500 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
(%)
2025-02-18 2024-12-31 13F COSTCO WHSL CORP COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM Put 110,700 -26.10 98,138 -22.93 n/a n/a n/a
2024-08-14 2024-06-30 13F COSTCO WHSL CORP COM Put 149,800 -34.41 127,329 -23.91 n/a n/a n/a
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM Put 228,400 -6.09 167,333 4.24 n/a n/a n/a
2024-02-15 2023-12-31 13F COSTCO WHSL CORP COM Put 243,200 36.63 160,531 59.63 n/a n/a n/a
2023-11-15 2023-09-30 13F COSTCO WHSL CORP COM Put 178,000 100,563 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.