International Business Machines Corporation
MX ˙ BMV ˙ US4592001014
SecurityMX:IBM / International Business Machines Corporation
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership476,911 shares
Latest Disclosed Value $ 115,598,454
Robeco Institutional Asset Management B.V. reports 18.89% decrease in ownership of IBM / International Business Machines Corporation

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 476,911 shares of International Business Machines Corporation (MX:IBM) valued at $115,598,454 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 587,948 shares of International Business Machines Corporation. This represents a change in shares of -18.89% 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)
2026-04-21 2026-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 476,911 -111,037 -18.89 115,598 -33.62 0.1648
2026-01-23 2025-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 587,948 72,082 13.97 174,156 19.65 0.2480
2025-10-22 2025-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 515,866 -228,570 -30.70 145,557 -33.67 0.2109
2025-07-18 2025-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 744,436 18,671 2.57 219,445 21.60 0.3548
2025-04-23 2025-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 725,765 -52,081 -6.70 180,469 5.54 0.3506
2025-01-23 2024-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 777,846 -234,499 -23.16 170,994 -23.60 0.3241
2024-10-29 2024-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,012,345 65,972 6.97 223,809 36.74 0.4446
2024-07-23 2024-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 946,373 -184,885 -16.34 163,675 -24.23 0.3522
2024-04-24 2024-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,131,258 10,612 0.95 216,025 17.87 0.4694
2024-02-14 2023-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 1,120,646 38,094 3.52 183,282 20.67 0.4443
2024-02-08 2023-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 567,476 -515,076 1,121 0.2099
2023-10-24 2023-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,082,552 97,982 9.95 151,882 15.28 0.4059
2023-07-24 2023-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 984,570 -179,506 -15.42 131,745 -13.67 0.3454
2023-05-04 2023-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 1,164,076 267,883 29.89 152,599 20.86 0.4160
2023-02-07 2022-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 896,193 -39,583 -4.23 126,265 13.57 0.3639
2022-12-01 2022-09-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 935,776 76,059 8.85 111,181 -8.40 0.3593
2022-10-27 2022-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 935,776 76,059 111,181 0.3545
2022-12-01 2022-06-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 859,717 -23,860 -2.70 121,382 5.66 0.3771
2022-07-27 2022-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 859,717 -23,860 121,382 0.3719
2022-12-01 2022-03-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 883,577 -6,364 -0.72 114,882 -3.42 0.2706
2022-04-26 2022-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 883,577 -6,364 114,882 0.2674
2022-12-01 2021-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 889,941 -54,867 -5.81 118,947 -9.38 0.2532
2022-01-31 2021-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 889,941 -54,867 118,947 0.2500
2022-12-01 2021-09-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 944,808 31,094 3.40 131,262 -2.00 0.2910
2021-10-20 2021-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 944,808 31,094 131,262 0.2873
2022-12-01 2021-06-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 913,714 106,088 13.14 133,943 24.45 0.2969
2021-07-28 2021-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 913,714 106,088 133,943 0.2929
2022-12-01 2021-03-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 807,626 -24,265 -2.92 107,624 2.78 0.2652
2021-04-23 2021-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 807,626 -24,265 107,624 0.2615
2022-12-01 2020-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 831,891 62,228 8.09 104,718 11.83 0.2752
2021-01-28 2020-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 831,891 62,228 104,718 0.2718
2021-01-19 2020-09-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 769,663 57,596 8.09 93,643 8.89 0.2894
2020-10-29 2020-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 769,663 57,596 93,643 289,200.0610
2021-01-19 2020-06-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 712,067 -77,793 -9.85 85,998 -1.85 0.2921
2020-07-20 2020-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 712,067 -77,793 85,998 291,806.5533
2021-01-19 2020-03-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 789,860 -12,214 -1.52 87,620 -18.50 0.3515
2020-04-30 2020-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 789,860 -12,214 87,620 351,200.7201
2021-01-19 2019-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 802,074 76,956 10.61 107,510 1.96 0.3442
2020-02-06 2019-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 802,074 76,956 107,510 343,862.4676
2021-01-19 2019-09-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 725,118 34,719 5.03 105,445 10.75 0.3723
2019-10-17 2019-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 725,118 34,719 105,445 371,736.9895
2021-01-19 2019-06-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 690,399 14,945 2.21 95,210 -0.10 0.3362
2019-07-19 2019-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 690,399 14,945 95,210 335,735.3639
2021-01-19 2019-03-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 675,454 68,218 11.23 95,308 38.19 0.3505
2019-05-02 2019-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 675,454 68,218 95,308 349,937.0717
2021-01-19 2018-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 607,236 9,715 1.63 68,969 -23.66 0.3097
2019-02-08 2018-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 607,236 9,715 68,969 309,150.1247
2021-01-19 2018-09-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 597,521 56,599 10.46 90,350 19.56 0.3578
2018-10-25 2018-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 597,521 56,599 90,350
2021-01-19 2018-06-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 540,922 150,270 38.47 75,566 26.07 0.3442
2018-08-03 2018-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 540,922 150,270 75,566
2021-01-19 2018-03-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 390,652 94,275 31.81 59,941 31.81 0.2813
2018-05-07 2018-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 390,652 94,275 59,941 280,316.0176
2021-01-19 2017-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 296,377 119,323 67.39 45,475 77.04 0.2357
2018-01-25 2017-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 296,377 119,323 45,475
2021-01-19 2017-09-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 177,054 -6,093 -3.33 25,686 -8.83 0.1595
2017-10-17 2017-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 177,054 -6,093 25,686 159,133.7809
2021-01-19 2017-06-30 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 183,147 33,848 22.67 28,175 8.37 0.1815
2017-08-07 2017-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 183,147 33,848 28,175 183,441.9412
2021-01-19 2017-03-31 13F/A-1 INTERNATIONAL BUSINESS MACHS COM 459200101 149,299 75,910 103.44 25,999 113.39 0.1731
2017-05-15 2017-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 149,299 75,910 25,999 172,683.7879
2017-02-09 2016-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 73,389 -30,367 -29.27 12,184 -26.07 0.0953
2016-11-07 2016-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 103,756 32,098 44.79 16,481 51.52 0.1218
2016-07-22 2016-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 71,658 5,843 8.88 10,877 9.12 0.0825
2016-05-16 2016-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 65,815 -5,521 -7.74 9,968 1.53 0.0800
2016-02-08 2015-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 71,336 2,435 3.53 9,818 -1.70 0.0840
2015-11-12 2015-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 68,901 1,105 1.63 9,988 -9.43 0.0761
2015-08-17 2015-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 67,796 9,007 15.32 11,028 16.88 0.0837
2015-04-24 2015-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 58,789 -1,687 -2.79 9,435 -2.76 0.0709
2015-02-12 2014-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 60,476 -67,348 -52.69 9,703 -60.01 0.0696
2014-11-10 2014-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 127,824 -666 -0.52 24,265 4.19 0.1733
2014-08-13 2014-06-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 128,490 12,334 10.62 23,290 4.16 0.1667
2014-05-07 2014-03-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 116,156 7,069 6.48 22,359 9.27 0.1715
2014-02-04 2013-12-31 13F INTERNATIONAL BUSINESS MACHS COM 459200101 109,087 13,726 14.39 20,463 15.89 0.1700
2013-11-12 2013-09-30 13F INTERNATIONAL BUSINESS MACHS COM 459200101 95,361 1,915 2.05 17,658 -1.13 0.1715
2013-08-27 2013-06-30 13F International Business Machine COM 459200101 93,446 93,446 17,859 0.1807
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.