International Business Machines Corporation
MX ˙ BMV ˙ US4592001014
SecurityMX:IBM / International Business Machines Corporation
InstitutionShelton Capital Management
Latest Disclosed Ownership50,908 shares
Latest Disclosed Value $ 12,339,526
Shelton Capital Management ownership in IBM / International Business Machines Corporation

On May 15, 2026 - Shelton Capital Management filed a 13F-HR form disclosing ownership of 50,908 shares of International Business Machines Corporation (MX:IBM) valued at $12,339,526 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 50,794 shares of International Business Machines Corporation. This represents a change in shares of 0.22% during the quarter.

Shelton Capital Management has a history of taking positions in derivatives of the underlying security (IBM) in the form of stock options.

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:IBM / International Business Machines 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)
2026-05-15 2026-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 50,908 114 0.22 12,340 -17.99 0.2699
2026-02-17 2025-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 50,794 9,800 23.91 15,046 30.08 0.2970
2025-11-14 2025-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 40,994 -13,542 -24.83 11,567 -28.05 0.2477
2025-08-13 2025-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 54,536 6,193 12.81 16,076 33.74 0.3698
2025-05-15 2025-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 48,343 -12,899 -21.06 12,021 -10.71 0.2864
2025-02-13 2024-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 61,242 -98 -0.16 13,463 -0.73 0.3351
2024-11-14 2024-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 61,340 -37,003 -37.63 13,561 -20.27 0.3481
2024-08-13 2024-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 98,343 10,202 11.57 17,008 1.05 0.4618
2024-05-15 2024-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 88,141 -7,899 -8.22 16,831 7.16 0.4779
2024-02-14 2023-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 96,040 43,434 82.56 15,707 112.83 0.4972
2023-11-14 2023-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 52,606 3,898 8.00 7,381 13.24 0.2704
2023-08-10 2023-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 48,708 40,500 493.42 6,518 506.23 0.2340
2023-05-11 2023-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 8,208 -51,892 -86.34 1,076 -87.30 0.0448
2023-02-13 2022-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 60,100 -8,227 -12.04 8,467 4.30 0.8868
2022-11-14 2022-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 68,327 -6,415 -8.58 8,118 -23.07 0.3860
2022-08-11 2022-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 74,742 -200 -0.27 10,553 8.30 0.4746
2022-05-12 2022-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 74,942 0 0.00 9,744 -2.73 0.3598
2022-02-11 2021-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 74,942 7,990 11.93 10,017 7.69 0.3545
2021-11-15 2021-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 66,952 9,615 16.77 9,302 10.67 0.3634
2021-08-12 2021-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 57,337 -65,337 -53.26 8,405 -48.59 0.3172
2021-05-14 2021-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 122,674 81,354 196.89 16,348 214.32 0.5690
2021-02-16 2020-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 41,320 2,189 5.59 5,201 9.24 0.2337
2020-11-09 2020-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 39,131 6,000 18.11 4,761 19.00 0.1971
2020-08-12 2020-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 33,131 4,436 15.46 4,001 25.70 0.2204
2020-05-13 2020-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 28,695 1,920 7.17 3,183 -11.31 0.2307
2020-02-11 2019-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 26,775 158 0.59 3,589 -7.28 0.1983
2019-11-13 2019-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 26,617 -17,060 -39.06 3,871 -35.73 0.2285
2019-08-14 2019-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 43,677 37,514 608.70 6,023 -86.21 0.3470
2019-05-10 2019-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 6,163 -38,275 -86.13 43,677 764.72 0.1723
2019-01-31 2018-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 44,438 1,195 2.76 5,051 -22.76 0.3436
2018-11-14 2018-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 43,243 14,940 52.79 6,539 65.38 0.3729
2018-08-10 2018-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 28,303 -1,494 -5.01 3,954 -13.52 0.2459
2018-05-15 2018-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 29,797 -253 -0.84 4,572 -0.82 0.2999
2018-02-06 2017-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 30,050 -12,775 -29.83 4,610 -25.80 0.2960
2017-11-28 2017-09-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 42,825 -17,036 -28.46 6,213 -32.53 0.4194
2017-11-14 2017-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 42,825 -17,036 6,213
2017-08-14 2017-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 59,861 16,140 36.92 9,208 20.94 0.6506
2017-11-28 2017-03-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 43,721 8,800 25.20 7,614 31.34 0.5273
2017-05-15 2017-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 38,843 3,922 6,764
2017-11-28 2016-12-31 13F/A-2 INTERNATIONAL BUSINESS MACHS COM 459200101 34,921 1,022 3.01 5,797 7.65 0.4414
2017-02-16 2016-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 34,921 0 5,797 0.5089
2017-02-13 2016-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 34,921 5,797
2017-12-06 2016-09-30 13F/A-2 INTERNATIONAL BUSINESS MACHS COM 459200101 33,899 -2,340 -6.46 5,385 -2.09 0.4494
2017-12-04 2016-09-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 34,921 1,022 5,797 0.3694
2016-11-14 2016-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 33,899 -2,340 5,385
2016-08-01 2016-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 36,239 -1,796 -4.72 5,500 -4.51 0.4846
2016-05-13 2016-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 38,035 -4,507 -10.59 5,760 -1.62 0.5214
2016-02-01 2015-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 42,542 275 0.65 5,855 -4.44 0.5661
2015-11-02 2015-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 42,267 2,600 6.55 6,127 -5.04 0.6744
2015-08-11 2015-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 39,667 -6,116 -13.36 6,452 -12.19 0.6674
2015-05-12 2015-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 45,783 -16 -0.03 7,348 0.00 0.7939
2015-02-10 2014-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 45,799 16,759 57.71 7,348 33.28 0.8558
2014-10-15 2014-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 29,040 4,897 20.28 5,513 25.98 0.7410
2014-07-25 2014-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 24,143 1,069 4.63 4,376 -1.49 0.6110
2014-04-14 2014-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 23,074 2,300 11.07 4,442 13.99 0.6512
2014-01-22 2013-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 20,774 -1,300 -5.89 3,897 -4.67 0.5893
2013-10-16 2013-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 22,074 1,310 6.31 4,088 3.02 0.6839
2013-07-10 2013-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 20,764 20,764 3,968 0.7239
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
(%)
2016-05-13 2016-03-31 13F INTERNATIONAL BUSINESS MACHS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2016-02-01 2015-12-31 13F INTERNATIONAL BUSINESS MACHS COM Put 4,300 0.00 592 -4.98 n/a n/a n/a
2015-11-02 2015-09-30 13F INTERNATIONAL BUSINESS MACHS COM Put 4,300 -50.00 623 -55.47 n/a n/a n/a
2015-08-11 2015-06-30 13F INTERNATIONAL BUSINESS MACHS COM Put 8,600 -32.81 1,399 -31.89 n/a n/a n/a
2015-05-12 2015-03-31 13F INTERNATIONAL BUSINESS MACHS COM Put 12,800 2,054 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.