International Business Machines Corporation
MX ˙ BMV ˙ US4592001014
SecurityMX:IBM / International Business Machines Corporation
InstitutionCastle Rock Wealth Management, LLC
Latest Disclosed Ownership17,878 shares
Latest Disclosed Value $ 4,436,590
Castle Rock Wealth Management, LLC reports 15.90% increase in ownership of IBM / International Business Machines Corporation

On April 8, 2026 - Castle Rock Wealth Management, LLC filed a 13F-HR form disclosing ownership of 17,878 shares of International Business Machines Corporation (MX:IBM) valued at $4,436,590 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 15,426 shares of International Business Machines Corporation. This represents a change in shares of 15.90% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-08 2026-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 17,878 2,452 15.90 4,437 0.84 0.9605
2026-02-05 2025-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 15,426 386 2.57 4,400 2.42 0.9513
2025-10-16 2025-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 15,040 582 4.03 4,295 3.79 0.9495
2025-07-23 2025-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 14,458 3,264 29.16 4,138 48.90 0.9670
2025-04-09 2025-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 11,194 -2,581 -18.74 2,780 -22.78 0.7506
2025-03-05 2024-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 13,775 841 6.50 3,599 22.83 0.8572
2024-10-09 2024-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 12,934 7,421 134.61 2,931 203.63 0.6993
2024-07-12 2024-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 5,513 -197 -3.45 965 2.88 0.2410
2024-05-13 2024-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 5,710 89 1.58 938 4.80 0.2562
2024-01-09 2023-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 5,621 286 5.36 895 18.23 0.2713
2023-10-11 2023-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 5,335 206 4.02 758 10.03 0.2543
2023-07-11 2023-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 5,129 585 12.87 689 25.09 0.2352
2023-05-12 2023-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 4,544 -237 -4.96 551 -14.33 0.1967
2023-01-31 2022-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 4,781 0 0.00 643 14.03 0.2872
2022-10-14 2022-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 4,781 -400 -7.72 563 -22.77 0.2837
2022-07-13 2022-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 5,181 5,181 729 0.3719
2019-08-08 2019-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 0 -800 -100.00 0 -100.00
2019-05-15 2019-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 800 800 112,880 2.3680
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.