International Business Machines Corporation
MX ˙ BMV ˙ US4592001014
SecurityMX:IBM / International Business Machines Corporation
InstitutionRound Rock Advisors, LLC
Latest Disclosed Ownership11,207 shares
Latest Disclosed Value $ 2,716,573
Round Rock Advisors, LLC reports 16.51% decrease in ownership of IBM / International Business Machines Corporation

On May 15, 2026 - Round Rock Advisors, LLC filed a 13F-HR form disclosing ownership of 11,207 shares of International Business Machines Corporation (MX:IBM) valued at $2,716,573 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on April 7, 2026 disclosing 13,423 shares of International Business Machines Corporation. This represents a change in shares of -16.51% 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)
2026-05-15 2026-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 11,207 -2,216 -16.51 2,717 -31.67 0.4157
2026-04-07 2025-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 13,423 -2,375 -15.03 3,976 -10.81 0.5981
2026-01-27 2025-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 13,423 -2,375 3,976 0.5978
2025-11-14 2025-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 15,798 383 2.48 4,458 -1.89 0.7062
2025-08-06 2025-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 15,415 420 2.80 4,544 21.86 0.7838
2025-04-30 2025-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 14,995 662 4.62 3,729 18.35 0.6915
2025-01-24 2024-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 14,333 711 5.22 3,151 4.62 0.6463
2024-11-04 2024-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 13,622 678 5.24 3,012 34.54 0.7039
2024-08-02 2024-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 12,944 -381 -2.86 2,239 -12.03 0.5451
2024-04-24 2024-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 13,325 124 0.94 2,545 17.83 0.6096
2024-01-29 2023-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 13,201 141 1.08 2,159 17.85 0.5436
2023-10-16 2023-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 13,060 82 0.63 1,832 5.53 0.6952
2023-07-20 2023-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 12,978 88 0.68 1,737 2.78 0.6275
2023-05-02 2023-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 12,890 -6 -0.05 1,690 -6.99 0.6480
2023-01-19 2022-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 12,896 870 7.23 1,817 27.08 0.7439
2022-10-20 2022-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 12,026 8,025 200.57 1,429 152.92 0.6472
2022-07-22 2022-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 4,001 0 0.00 565 8.65 0.2545
2022-04-28 2022-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 4,001 1,682 72.53 520 67.74 0.2109
2022-01-20 2021-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 2,319 708 43.95 310 38.39 0.1374
2021-10-25 2021-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,611 0 0.00 224 -5.08 0.1657
2021-08-05 2021-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,611 -181 -10.10 236 -1.26 0.1721
2021-04-26 2021-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,792 2 0.11 239 6.22 0.1900
2021-02-19 2020-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,790 1,790 225 0.2060
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.