International Business Machines Corporation
MX ˙ BMV ˙ US4592001014
SecurityMX:IBM / International Business Machines Corporation
InstitutionNational Pension Service
Latest Disclosed Ownership2,285,117 shares
Latest Disclosed Value $ 553,889,510
National Pension Service reports 0.77% increase in ownership of IBM / International Business Machines Corporation

On May 12, 2026 - National Pension Service filed a 13F-HR form disclosing ownership of 2,285,117 shares of International Business Machines Corporation (MX:IBM) valued at $553,889,510 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 2,267,663 shares of International Business Machines Corporation. This represents a change in shares of 0.77% 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)
2026-05-12 2026-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 2,285,117 17,454 0.77 553,890 -17.54 0.4206
2026-02-10 2025-12-31 13F INTERNATIONAL BUSINESS MACHS COM INTERNATIONAL BUSINESS MACHS COM 459200101 2,267,663 26,550 1.18 671,704 6.22 0.4973
2025-11-04 2025-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 2,241,113 63,087 2.90 632,352 -1.51 0.4911
2025-08-08 2025-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 2,178,026 -65,516 -2.92 642,039 15.09 0.5543
2025-05-13 2025-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 2,243,542 114,397 5.37 557,879 19.19 0.5362
2025-02-05 2024-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 2,129,145 145,931 7.36 468,050 6.75 0.4429
2024-10-30 2024-09-30 13F INTERNATIONALBUSINESSMACHS COM 459200101 1,983,214 241,652 13.88 438,449 45.57 0.4228
2024-08-13 2024-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,741,562 45,730 2.70 301,203 -6.99 0.3461
2024-05-14 2024-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,695,832 30,446 1.83 323,836 18.89 0.3886
2024-02-07 2023-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,665,386 36,403 2.23 272,374 16.73 0.3793
2023-11-15 2023-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,628,983 26,134 1.63 233,336 8.59 0.3734
2023-08-16 2023-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,602,849 180,053 12.65 214,878 16.87 0.3466
2023-05-12 2023-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,422,796 22,513 1.61 183,854 -6.81 0.3348
2023-02-24 2022-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 1,400,283 26,518 1.93 197,286 18.07 0.3881
2023-02-21 2022-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,400,283 26,518 197 0.3881
2023-02-24 2022-09-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 1,373,765 31,783 2.37 167,091 -11.81 0.3487
2022-11-18 2022-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,373,765 31,783 167,091 0.3487
2022-08-17 2022-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,341,982 96,824 7.78 189,474 17.04 0.3906
2022-05-13 2022-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,245,158 -11,224 -0.89 161,895 -3.59 0.2955
2022-02-15 2021-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,256,382 10,056 0.81 167,928 -3.02 0.2930
2021-11-18 2021-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,246,326 -6,997 -0.56 173,152 -5.75 0.3297
2021-08-17 2021-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,253,323 20,124 1.63 183,725 11.80 0.3490
2021-05-14 2021-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,233,199 68,273 5.86 164,336 12.07 0.3438
2021-02-19 2020-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,164,926 43,174 3.85 146,641 7.39 0.3343
2020-11-13 2020-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,121,752 0 0.00 136,551 0.79 0.3587
2020-08-11 2020-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,121,752 52,748 4.93 135,474 14.24 0.3869
2020-05-27 2020-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,069,004 12,744 1.21 118,585 -16.24 0.4014
2020-02-21 2019-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,056,260 43,284 4.27 141,581 -3.89 0.3884
2019-11-15 2019-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,012,976 47,680 4.94 147,307 10.66 0.4661
2019-08-14 2019-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 965,296 55,603 6.11 133,114 3.71 0.4449
2019-05-15 2019-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 909,693 33,535 3.83 128,358 7.34 0.4938
2019-02-15 2018-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 876,158 51,254 6.21 119,578 -4.13 0.4933
2018-11-15 2018-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 824,904 8,548 1.05 124,734 9.11 0.5078
2018-08-14 2018-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 816,356 77,038 10.42 114,322 0.78 0.5173
2018-04-13 2018-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 739,318 -4,996 -0.67 113,434 -0.66 0.5623
2018-01-17 2017-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 744,314 29,192 4.08 114,193 9.63 0.5701
2017-10-16 2017-09-30 13F IBM COM 459200101 715,122 28,745 4.19 104,165 -1.54 0.5732
2017-07-13 2017-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 686,377 64,416 10.36 105,791 -2.17 0.6301
2017-04-11 2017-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 621,961 17,352 2.87 108,134 7.75 0.7239
2017-01-18 2016-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 604,609 36,464 6.42 100,359 11.20 0.6865
2016-10-14 2016-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 568,145 45,724 8.75 90,250 13.82 0.7233
2016-08-11 2016-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 522,421 50,422 10.68 79,293 10.92 0.7039
2016-05-16 2016-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 471,999 19,207 4.24 71,484 14.72 0.7160
2016-02-12 2015-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 452,792 27,782 6.54 62,313 1.13 0.6544
2015-10-15 2015-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 425,010 59,839 16.39 61,614 3.73 0.7790
2015-07-15 2015-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 365,171 51,806 16.53 59,398 18.10 0.7705
2015-04-15 2015-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 313,365 43,211 15.99 50,295 16.04 0.7267
2015-01-13 2014-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 270,154 -48,262 -15.16 43,344 -28.29 0.7315
2014-11-07 2014-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 318,416 318,416 60,445 0.9598
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.