International Business Machines Corporation
MX ˙ BMV ˙ US4592001014
SecurityMX:IBM / International Business Machines Corporation
InstitutionBlume Capital Management, Inc.
Latest Disclosed Ownership475 shares
Latest Disclosed Value $ 115,136
Blume Capital Management, Inc. reports 20.83% decrease in ownership of IBM / International Business Machines Corporation

On May 1, 2026 - Blume Capital Management, Inc. filed a 13F-HR form disclosing ownership of 475 shares of International Business Machines Corporation (MX:IBM) valued at $115,136 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 600 shares of International Business Machines Corporation. This represents a change in shares of -20.83% during the quarter.

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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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)
2026-05-01 2026-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 475 -125 -20.83 115 -35.03 0.0196
2026-02-05 2025-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 600 0 0.00 178 4.73 0.0323
2025-11-06 2025-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 600 -27 -4.31 169 -8.15 0.0322
2025-07-30 2025-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 627 18 2.96 185 21.85 0.0372
2025-05-06 2025-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 609 9 1.50 151 15.27 0.0339
2025-02-10 2024-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 600 0 0.00 132 -0.76 0.0295
2024-10-29 2024-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 600 0 0.00 133 28.16 0.0297
2024-08-05 2024-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 600 0 0.00 104 -9.65 0.0250
2024-05-02 2024-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 600 -240 -28.57 115 -16.79 0.0277
2024-05-02 2023-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 840 0 0.00 137 17.09 0.0359
2024-02-07 2023-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 840 0 137 0.0359
2024-05-02 2023-09-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 840 0 0.00 118 4.46 0.0349
2023-11-03 2023-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 840 0 118 0.0349
2024-05-02 2023-06-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 840 0 0.00 112 1.82 0.0329
2023-08-10 2023-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 840 0 112 0.0329
2024-05-02 2023-03-31 13F/A-1 IBM COM 459200101 840 0 0.00 110 -6.78 0.0349
2023-05-08 2023-03-31 13F IBM COM 459200101 840 0 110 0.0349
2023-02-08 2022-12-31 13F IBM COM 459200101 840 0 0.00 118 18.00 0.0400
2022-11-15 2022-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 840 0 0.00 100 -15.97 0.0377
2022-08-11 2022-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 840 0 0.00 119 9.17 0.0470
2022-05-12 2022-03-31 13F IBM COM 459200101 840 0 0.00 109 -2.68 0.0359
2022-02-07 2021-12-31 13F IBM COM 459200101 840 0 0.00 112 -4.27 0.0370
2021-11-12 2021-09-30 13F IBM COM 459200101 840 0 0.00 117 -4.88 0.0428
2021-08-10 2021-06-30 13F IBM COM 459200101 840 0 0.00 123 9.82 0.0450
2021-05-10 2021-03-31 13F IBM COM 459200101 840 0 0.00 112 5.66 0.0441
2021-02-09 2020-12-31 13F IBM COM 459200101 840 0 0.00 106 3.92 0.0453
2020-11-12 2020-09-30 13F IBM COM 459200101 840 0 0.00 102 0.99 0.0517
2020-08-06 2020-06-30 13F IBM COM 459200101 840 0 0.00 101 8.60 0.0560
2020-05-07 2020-03-31 13F IBM COM 459200101 840 0 0.00 93 -16.96 0.0596
2020-02-05 2019-12-31 13F IBM COM 459200101 840 0 0.00 112 -8.20 0.0548
2019-11-12 2019-09-30 13F IBM COM 459200101 840 0 0.00 122 5.17 0.0609
2019-07-29 2019-06-30 13F IBM COM 459200101 840 0 0.00 116 -2.52 0.0587
2019-05-06 2019-03-31 13F IBM COM 459200101 840 0 0.00 119 25.26 0.0625
2019-02-05 2018-12-31 13F IBM COM 459200101 840 0 0.00 95 -25.20 0.0542
2018-11-02 2018-09-30 13F IBM COM 459200101 840 0 0.00 127 8.55 0.0664
2018-08-02 2018-06-30 13F IBM COM 459200101 840 -125 -12.95 117 -20.95 0.0638
2018-05-04 2018-03-31 13F IBM COM 459200101 965 25 2.66 148 2.78 0.0823
2018-02-09 2017-12-31 13F IBM COM 459200101 940 0 0.00 144 5.88 0.0737
2018-02-14 2017-09-30 13F/A-1 IBM COM 459200101 940 0 0.00 136 -6.21 0.0719
2017-11-13 2017-09-30 13F IBM COM 459200101 940 0 136
2017-08-08 2017-06-30 13F IBM COM 459200101 940 0 0.00 145 -11.59 0.0823
2017-05-12 2017-03-31 13F IBM COM 459200101 940 -105 -10.05 164 -5.20 0.0949
2017-01-30 2016-12-31 13F IBM COM 459200101 1,045 155 17.42 173 22.70 0.1040
2016-11-07 2016-09-30 13F IBM COM 459200101 890 0 0.00 141 4.44 0.0864
2016-08-11 2016-06-30 13F/A-1 IBM COM 459200101 890 165 22.76 135 22.73 0.0891
2016-08-04 2016-06-30 13F IBM COM 459200101 350 135
2016-05-12 2016-03-31 13F IBM COM 459200101 725 -175 -19.44 110 -11.29 0.0760
2016-05-26 2015-12-31 13F/A-1 IBM COM 459200101 900 0 0.00 124 -4.62 0.0877
2016-02-08 2015-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 900 124
2015-11-05 2015-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 900 -250 -21.74 130 -30.48 0.1054
2015-08-11 2015-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,150 0 0.00 187 1.08 0.1415
2015-05-05 2015-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,150 100 9.52 185 10.12 0.1283
2015-02-10 2014-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,050 350 50.00 168 26.32 0.1184
2014-11-12 2014-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 700 -75 -9.68 133 -5.00 0.1035
2014-07-29 2014-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 775 -44 -5.37 140 -11.39 0.1099
2014-05-13 2014-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 819 -74 -8.29 158 -5.95 0.1254
2014-02-14 2013-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 893 893 168 0.1390
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.