SK Telecom Co., Ltd. - Depositary Receipt (Common Stock)
US ˙ NYSE ˙ US78440P3064

SecuritySKM / SK Telecom Co., Ltd. - Depositary Receipt (Common Stock)
InstitutionCitigroup Inc
Latest Disclosed Ownership27,197 shares
Latest Disclosed Value $ 796,600
Citigroup Inc ownership in SKM / SK Telecom Co., Ltd. - Depositary Receipt (Common Stock)

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 27,197 shares of SK Telecom Co., Ltd. - Depositary Receipt (Common Stock) (US:SKM) valued at $796,600 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 12,399 shares of SK Telecom Co., Ltd. - Depositary Receipt (Common Stock). This represents a change in shares of 119.35% during the quarter. The current value of the position is $1,224,953 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (SKM) in the form of stock options. The firm currently holds call 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.

SKM / SK Telecom Co., Ltd. - 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)
2026-05-11 2026-03-31 13F SK TELECOM SPONSORED ADR 78440P306 27,197 14,798 119.35 797 213.39 0.0002
2026-02-13 2025-12-31 13F SK TELECOM SPONSORED ADR 78440P306 12,399 -1,152,806 -98.94 255 -98.99 0.0001
2025-11-10 2025-09-30 13F SK TELECOM SPONSORED ADR 78440P306 1,165,205 -10,949 -0.93 25,168 -8.36 0.0112
2025-08-11 2025-06-30 13F SK TELECOM SPONSORED ADR 78440P306 1,176,154 -26,676 -2.22 27,463 7.39 0.0135
2025-05-12 2025-03-31 13F SK TELECOM SPONSORED ADR 78440P306 1,202,830 429,434 55.53 25,572 57.15 0.0131
2025-02-12 2024-12-31 13F SK TELECOM SPONSORED ADR 78440P306 773,396 -38,454 -4.74 16,272 -15.68 0.0097
2024-11-12 2024-09-30 13F SK TELECOM SPONSORED ADR 78440P306 811,850 2,737 0.34 19,298 13.95 0.0112
2024-08-12 2024-06-30 13F SK TELECOM SPONSORED ADR 78440P306 809,113 -47,859 -5.58 16,935 -8.35 0.0108
2024-05-10 2024-03-31 13F SK TELECOM SPONSORED ADR 78440P306 856,972 7,977 0.94 18,476 1.70 0.0121
2024-02-09 2023-12-31 13F SK TELECOM SPONSORED ADR 78440P306 848,995 116,253 15.87 18,168 15.54 0.0128
2023-12-06 2023-09-30 13F/A-1 SK TELECOM SPONSORED ADR 78440P306 732,742 196,660 36.68 15,725 50.35 0.0118
2023-11-09 2023-09-30 13F SK TELECOM SPONSORED ADR 78440P306 732,742 196,660 15,725 0.0117
2023-08-10 2023-06-30 13F SK TELECOM SPONSORED ADR 78440P306 536,082 432,491 417.50 10,459 392.37 0.0069
2023-05-11 2023-03-31 13F SK TELECOM SPONSORED ADR 78440P306 103,591 59,726 136.16 2,125 135.22 0.0015
2023-02-09 2022-12-31 13F SK TELECOM SPONSORED ADR 78440P306 43,865 30,497 228.13 903 251.36 0.0007
2022-11-10 2022-09-30 13F SK TELECOM SPONSORED ADR 78440P306 13,368 174 1.32 257 -12.88 0.0002
2022-08-10 2022-06-30 13F SK TELECOM SPONSORED ADR 78440P306 13,194 -668 -4.82 295 -16.90 0.0002
2022-05-12 2022-03-31 13F SK TELECOM SPONSORED ADR 78440P306 13,862 -5,003 -26.52 355 -29.42 0.0002
2022-02-10 2021-12-31 13F SK TELECOM SPONSORED ADR 78440P306 18,865 -5,265 -21.82 503 -30.81 0.0003
2021-11-10 2021-09-30 13F SK TELECOM SPONSORED ADR 78440P108 24,130 -66,365 -73.34 727 -74.42 0.0004
2021-08-10 2021-06-30 13F SK TELECOM SPONSORED ADR 78440P108 90,495 16,631 22.52 2,842 41.25 0.0017
2021-05-13 2021-03-31 13F SK TELECOM SPONSORED ADR 78440P108 73,864 21,170 40.18 2,012 55.85 0.0013
2021-02-11 2020-12-31 13F SK TELECOM SPONSORED ADR 78440P108 52,694 3,310 6.70 1,291 16.52 0.0008
2020-11-12 2020-09-30 13F SK TELECOM SPONSORED ADR 78440P108 49,384 14,641 42.14 1,108 65.13 0.0007
2020-08-12 2020-06-30 13F SK TELECOM SPONSORED ADR 78440P108 34,743 22,543 184.78 671 238.89 0.0005
2020-05-12 2020-03-31 13F SK TELECOM SPONSORED ADR 78440P108 12,200 6,656 120.06 198 54.69 0.0002
2020-02-12 2019-12-31 13F SK TELECOM SPONSORED ADR 78440P108 5,544 2,228 67.19 128 72.97 0.0001
2019-11-08 2019-09-30 13F SK TELECOM SPONSORED ADR 78440P108 3,316 -18,336 -84.69 74 -86.17 0.0001
2019-08-12 2019-06-30 13F SK TELECOM SPONSORED ADR 78440P108 21,652 -13,883 -39.07 535 -38.51 0.0004
2019-05-13 2019-03-31 13F SK TELECOM SPONSORED ADR 78440P108 35,535 7,622 27.31 870 16.31 0.0008
2019-02-12 2018-12-31 13F SK TELECOM SPONSORED ADR 78440P108 27,913 -1,652 -5.59 748 -9.22 0.0008
2018-11-13 2018-09-30 13F SK TELECOM SPONSORED ADR 78440P108 29,565 3,274 12.45 824 34.42 0.0007
2018-08-10 2018-06-30 13F SK TELECOM SPONSORED ADR 78440P108 26,291 -1,920 -6.81 613 -11.03 0.0006
2018-05-11 2018-03-31 13F SK TELECOM SPONSORED ADR 78440P108 28,211 13,621 93.36 689 69.29 0.0006
2018-02-12 2017-12-31 13F SK TELECOM SPONSORED ADR 78440P108 14,590 -39,028 -72.79 407 -69.12 0.0003
2017-11-13 2017-09-30 13F SK TELECOM SPONSORED ADR 78440P108 53,618 13,516 33.70 1,318 28.09 0.0011
2017-08-11 2017-06-30 13F SK TELECOM SPONSORED ADR 78440P108 40,102 21,368 114.06 1,029 118.01 0.0009
2017-05-12 2017-03-31 13F SK TELECOM SPONSORED ADR 78440P108 18,734 -2,224 -10.61 472 7.76 0.0004
2017-02-10 2016-12-31 13F SK TELECOM SPONSORED ADR 78440P108 20,958 3,169 17.81 438 8.96 0.0004
2016-11-10 2016-09-30 13F SK TELECOM SPONSORED ADR 78440P108 17,789 -1,697 -8.71 402 -1.23 0.0004
2016-08-12 2016-06-30 13F SK TELECOM SPONSORED ADR 78440P108 19,486 -21,220 -52.13 407 -50.43 0.0004
2016-05-13 2016-03-31 13F SK TELECOM SPONSORED ADR 78440P108 40,706 -902 -2.17 821 -2.03 0.0009
2016-02-12 2015-12-31 13F SK TELECOM SPONSORED ADR 78440P108 41,608 3,408 8.92 838 -10.09 0.0008
2015-11-13 2015-09-30 13F SK TELECOM SPONSORED ADR 78440P108 38,200 -1,145 -2.91 932 -4.51 0.0009
2015-08-13 2015-06-30 13F SK TELECOM SPONSORED ADR 78440P108 39,345 7,277 22.69 976 11.93 0.0009
2015-05-14 2015-03-31 13F SK TELECOM SPONSORED ADR 78440P108 32,068 -2,682 -7.72 872 -7.14 0.0008
2015-02-17 2014-12-31 13F SK TELECOM SPONSORED ADR 78440P108 34,750 -4,812 -12.16 939 -21.75 0.0008
2014-11-14 2014-09-30 13F SK TELECOM SPONSORED ADR 78440P108 39,562 6,098 18.22 1,200 38.25 0.0010
2014-08-14 2014-06-30 13F SK TELECOM SPONSORED ADR 78440P108 33,464 -929 -2.70 868 11.86 0.0008
2014-05-15 2014-03-31 13F SK TELECOM SPONSORED ADR 78440P108 34,393 26,580 340.20 776 302.07 0.0008
2014-02-14 2013-12-31 13F SK TELECOM SPONSORED ADR 78440P108 7,813 -2,313 -22.84 193 -15.72 0.0002
2013-11-14 2013-09-30 13F SK TELECOM SPONSORED ADR 78440P108 10,126 -50,117 -83.19 229 -81.29 0.0002
2013-08-14 2013-06-30 13F SK TELECOM SPONSORED ADR 78440P108 60,243 60,243 1,224 0.0012
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
(%)
2017-11-13 2017-09-30 13F SK TELECOM SPONSORED ADR Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-08-11 2017-06-30 13F SK TELECOM SPONSORED ADR Call 100,000 2,567 n/a n/a n/a
2016-02-12 2015-12-31 13F SK TELECOM SPONSORED ADR Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-11-13 2015-09-30 13F SK TELECOM SPONSORED ADR Call 10,100 246 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.