KT Corporation - Depositary Receipt (Common Stock)
US ˙ NYSE ˙ US48268K1016

SecurityKT / KT Corporation - Depositary Receipt (Common Stock)
InstitutionSimplex Trading, Llc
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Simplex Trading, Llc ownership in KT / KT Corporation - Depositary Receipt (Common Stock)

On February 11, 2026 - Simplex Trading, Llc filed a 13F-HR form disclosing ownership of 0 shares of KT Corporation - Depositary Receipt (Common Stock) (US:KT) valued at $0 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 12, 2025 disclosing 3 shares of KT Corporation - Depositary Receipt (Common Stock). The current value of the position is $0 USD.

Simplex Trading, Llc has a history of taking positions in derivatives of the underlying security (KT) 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.

KT / KT Corporation - Depositary Receipt (Common Stock) 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)
2026-02-11 2025-12-31 13F KT COM 48268K101 0 -3 -100.00 0 0.0000
2025-11-12 2025-09-30 13F KT COM 48268K101 3 -129 -97.73 0 0.0000
2025-08-05 2025-06-30 13F KT COM 48268K101 132 129 4,300.00 0 0.0000
2025-05-12 2025-03-31 13F KT COM 48268K101 3 3 0 0.0000
2023-02-02 2022-12-31 13F KT COM 48268K101 0 -1,167 -100.00 0 -100.00
2022-11-04 2022-09-30 13F KT COM 48268K101 1,167 1,133 3,332.35 14 0.0000
2022-08-03 2022-06-30 13F KT COM 48268K101 34 34 0 0.0000
2022-05-02 2022-03-31 13F KT COM 48268K101 0 -3,164 -100.00 0 -100.00
2022-02-23 2021-12-31 13F/A-1 KT COM 48268K101 3,164 -3,602 -53.24 39 -58.51 0.0000
2022-02-04 2021-12-31 13F KT COM 48268K101 6,766 0 94 0.0000
2021-10-28 2021-09-30 13F KT COM 48268K101 6,766 0 0.00 94 0.00 0.0001
2021-08-12 2021-06-30 13F KT COM 48268K101 6,766 6,766 94 0.0001
2021-04-26 2021-03-31 13F KT COM 48268K101 0 -470 -100.00 0 -100.00
2021-02-02 2020-12-31 13F KT COM 48268K101 470 -6,944 -93.66 5 -92.96 0.0000
2020-10-14 2020-09-30 13F KT COM 48268K101 7,414 7,414 1,477.45 71 1,320.00 0.0001
2020-02-05 2019-12-31 13F KT COM 48268K101 0 -499 -100.00 0 -100.00
2019-10-15 2019-09-30 13F KT COM 48268K101 499 354 244.14 5 400.00 0.0000
2019-07-26 2019-06-30 13F KT COM 48268K101 145 145 -70.94 1 -80.00 0.0000
2019-04-18 2019-03-31 13F KT COM 48268K101 0 -3,083 -100.00 0 -100.00
2019-01-16 2018-12-31 13F KT COM 48268K101 3,083 3,083 43 0.0001
2017-07-12 2017-06-30 13F KT COM 48268K101 0 -3,847 -100.00 0 -100.00
2017-04-21 2017-03-31 13F KT COM 48268K101 3,847 263 7.34 64 28.00 0.0028
2017-01-11 2016-12-31 13F KT COM 48268K101 3,584 3,584 50 0.0030
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
(%)
2026-05-14 2026-03-31 13F KT CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-11 2025-12-31 13F KT CALL Call 4,300 48.28 82 n/a n/a n/a
2025-11-12 2025-09-30 13F KT CALL Call 2,900 2,800.00 0 n/a n/a n/a
2025-08-05 2025-06-30 13F KT CALL Call 100 -50.00 0 n/a n/a n/a
2025-05-12 2025-03-31 13F KT CALL Call 200 -99.01 0 n/a n/a n/a
2025-02-11 2024-12-31 13F KT CALL Call 20,200 512.12 0 n/a n/a n/a
2024-11-08 2024-09-30 13F KT CALL Call 3,300 200.00 0 n/a n/a n/a
2024-07-25 2024-06-30 13F KT CALL Call 1,100 22.22 0 n/a n/a n/a
2024-04-25 2024-03-31 13F KT CALL Call 900 0 n/a n/a n/a
2024-02-02 2023-12-31 13F KT CALL Call 0 -100.00 0 n/a n/a n/a
2023-11-01 2023-09-30 13F KT CALL Call 400 -87.10 0 n/a n/a n/a
2023-08-04 2023-06-30 13F KT CALL Call 3,100 -27.91 0 n/a n/a n/a
2023-04-27 2023-03-31 13F KT CALL Call 4,300 86.96 0 n/a n/a n/a
2023-02-02 2022-12-31 13F KT CALL Call 2,300 -28.12 0 -100.00 n/a n/a n/a
2022-11-04 2022-09-30 13F KT CALL Call 3,200 28.00 39 14.71 n/a n/a n/a
2022-08-03 2022-06-30 13F KT CALL Call 2,500 56.25 34 54.55 n/a n/a n/a
2022-05-02 2022-03-31 13F KT CALL Call 1,600 128.57 22 175.00 n/a n/a n/a
2022-02-23 2021-12-31 13F/A KT CALL Call 700 -98.65 8 -98.90 n/a n/a n/a
2022-02-04 2021-12-31 13F KT CALL Call 52,000 728 n/a n/a n/a
2021-10-28 2021-09-30 13F KT CALL Call 52,000 0.00 728 0.41 n/a n/a n/a
2021-08-12 2021-06-30 13F KT CALL Call 52,000 2,587.34 725 -69.88 n/a n/a n/a
2021-04-26 2021-03-31 13F KT CALL Call 1,935 1,243.75 2,407 1,423.42 n/a n/a n/a
2021-02-02 2020-12-31 13F KT CALL Call 144 46.94 158 68.09 n/a n/a n/a
2020-10-14 2020-09-30 13F KT CALL Call 98 -4.85 94 -6.00 n/a n/a n/a
2020-07-13 2020-06-30 13F KT CALL Call 103 5,050.00 100 9,900.00 n/a n/a n/a
2020-04-29 2020-03-31 13F KT CALL Call 2 1 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
(%)
2026-05-14 2026-03-31 13F KT PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-11 2025-12-31 13F KT PUT Put 100 -50.00 2 n/a n/a n/a
2025-11-12 2025-09-30 13F KT PUT Put 200 0 n/a n/a n/a
2024-02-02 2023-12-31 13F KT PUT Put 0 -100.00 0 n/a n/a n/a
2023-11-01 2023-09-30 13F KT PUT Put 800 60.00 0 n/a n/a n/a
2023-08-04 2023-06-30 13F KT PUT Put 500 150.00 0 n/a n/a n/a
2023-04-27 2023-03-31 13F KT PUT Put 200 0.00 0 n/a n/a n/a
2023-02-02 2022-12-31 13F KT PUT Put 200 -88.24 0 -100.00 n/a n/a n/a
2022-11-04 2022-09-30 13F KT PUT Put 1,700 21.43 20 5.26 n/a n/a n/a
2022-08-03 2022-06-30 13F KT PUT Put 1,400 1,300.00 19 1,800.00 n/a n/a n/a
2022-05-02 2022-03-31 13F KT PUT Put 100 -92.86 1 -94.12 n/a n/a n/a
2022-02-23 2021-12-31 13F/A KT PUT Put 1,400 -95.35 17 -95.96 n/a n/a n/a
2022-02-04 2021-12-31 13F KT PUT Put 30,100 421 n/a n/a n/a
2021-10-28 2021-09-30 13F KT PUT Put 30,100 0.00 421 0.48 n/a n/a n/a
2021-08-12 2021-06-30 13F KT PUT Put 30,100 10,034.68 419 13.55 n/a n/a n/a
2021-04-26 2021-03-31 13F KT PUT Put 297 29,600.00 369 36,800.00 n/a n/a n/a
2021-02-02 2020-12-31 13F KT PUT Put 1 0.00 1 -99.73 n/a n/a n/a
2020-10-14 2020-09-30 13F KT PUT Put 1 0.00 0 -100.00 n/a n/a n/a
2020-07-13 2020-06-30 13F KT PUT Put 1 0.00 0 n/a n/a n/a
2020-04-29 2020-03-31 13F KT PUT Put 1 0.00 0 n/a n/a n/a
2020-02-05 2019-12-31 13F KT PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-10-15 2019-09-30 13F KT PUT Put 5 -16.67 5 -28.57 n/a n/a n/a
2019-07-26 2019-06-30 13F KT PUT Put 6 500.00 7 600.00 n/a n/a n/a
2019-04-18 2019-03-31 13F KT PUT Put 1 1 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.