International Business Machines Corporation
MX ˙ BMV ˙ US4592001014
SecurityMX:IBM / International Business Machines Corporation
InstitutionRhumbline Advisers
Latest Disclosed Ownership1,564,848 shares
Latest Disclosed Value $ 379,303,387
Rhumbline Advisers reports 1.41% decrease in ownership of IBM / International Business Machines Corporation

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 1,564,848 shares of International Business Machines Corporation (MX:IBM) valued at $379,303,387 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,587,155 shares of International Business Machines Corporation. This represents a change in shares of -1.41% 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 CORP COM COM 459200101 1,564,848 -22,307 -1.41 379,303 -19.32 0.3245
2026-02-13 2025-12-31 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,587,155 -34,527 -2.13 470,131 2.74 0.3801
2025-11-06 2025-09-30 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,621,682 -15,252 -0.93 457,574 -5.17 0.3675
2025-08-12 2025-06-30 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,636,934 -46,330 -2.75 482,535 15.28 0.4132
2025-05-29 2025-03-31 13F/A-1 INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,683,264 -26,578 -1.55 418,560 11.36 0.3915
2025-04-08 2025-03-31 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,683,264 -26,578 418,560 0.3915
2025-05-29 2024-12-31 13F/A-1 INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,709,842 -16,075 -0.93 375,874 -1.49 0.3362
2025-01-30 2024-12-31 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,709,842 -16,075 375,874 0.3362
2024-11-12 2024-09-30 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,725,917 -64,573 -3.61 381,566 23.22 0.3442
2024-08-01 2024-06-30 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,790,490 2,045 0.11 309,665 -9.33 0.2910
2024-05-09 2024-03-31 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,788,445 27,862 1.58 341,521 18.61 0.3280
2024-02-08 2023-12-31 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,760,583 -10,638 -0.60 287,943 15.87 0.3018
2023-11-09 2023-09-30 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,771,221 8,202 0.47 248,502 5.34 0.2885
2023-08-08 2023-06-30 13F INTERNATIONAL BUSINESS MACHS CORP COM COM 459200101 1,763,019 -17,850 -1.00 235,910 101,148.50 0.2642
2023-05-11 2023-03-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,780,869 43,978 2.53 233 -99.90 0.2880
2023-02-14 2022-12-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,736,891 62,106 3.71 244,711 22.98 0.3290
2022-11-10 2022-09-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,674,785 58,028 3.59 198,981 -12.83 0.2964
2022-08-11 2022-06-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,616,757 55,179 3.53 228,270 12.43 0.3331
2022-05-12 2022-03-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,561,578 9,654 0.62 203,036 -2.12 0.2613
2022-02-10 2021-12-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,551,924 9,929 0.64 207,430 -3.17 0.2542
2021-11-12 2021-09-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,541,995 -96,535 -5.89 214,229 -10.81 0.2899
2021-08-05 2021-06-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,638,530 -86,644 -5.02 240,192 4.48 0.3152
2021-05-06 2021-03-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,725,174 -23,493 -1.34 229,897 4.44 0.3123
2021-02-10 2020-12-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,748,667 29,719 1.73 220,122 5.25 0.3038
2020-11-12 2020-09-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,718,948 15,309 0.90 209,144 1.65 0.3277
2020-08-13 2020-06-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,703,639 79,730 4.91 205,748 14.22 0.3436
2020-05-06 2020-03-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,623,909 18,261 1.14 180,140 -16.30 0.3775
2020-02-05 2019-12-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,605,648 4,845 0.30 215,221 -7.55 0.3599
2019-10-23 2019-09-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,600,803 39,864 2.55 232,789 8.15 0.4254
2019-08-14 2019-06-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,560,939 -51,772 -3.21 215,253 -5.41 0.4041
2019-05-01 2019-03-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,612,711 -10,813 -0.67 227,554 23.30 0.4407
2019-01-31 2018-12-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,623,524 5,433 0.34 184,546 -24.57 0.4016
2018-11-07 2018-09-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,618,091 31,912 2.01 244,672 10.42 0.4726
2018-08-06 2018-06-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,586,179 62,831 4.12 221,589 -5.19 0.4469
2018-05-02 2018-03-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,523,348 -29,263 -1.88 233,727 -1.88 0.4882
2018-02-09 2017-12-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,552,611 17,235 1.12 238,202 6.94 0.4838
2017-11-06 2017-09-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,535,376 35,803 2.39 222,752 -3.44 0.4843
2017-08-02 2017-06-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,499,573 -15,320 -1.01 230,679 -12.56 0.5265
2017-05-02 2017-03-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,514,893 16,827 1.12 263,803 6.09 0.6162
2017-01-27 2016-12-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,498,066 37,307 2.55 248,664 7.16 0.6302
2016-11-08 2016-09-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,460,759 45,798 3.24 232,042 8.05 0.6394
2016-08-11 2016-06-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 1,414,961 43,342 3.16 214,763 3.38 0.6363
2016-05-02 2016-03-31 13F INTL BUSINESS MACHINES CORP COM 459200101 1,371,619 59,937 4.57 207,732 15.08 0.6446
2016-02-03 2015-12-31 13F INTL BUSINESS MACHINES CORP COM 459200101 1,311,682 -11,584 -0.88 180,514 -5.90 0.5809
2015-11-04 2015-09-30 13F INTL BUSINESS MACHINES CORP COM 459200101 1,323,266 7,277 0.55 191,834 -10.38 0.6526
2015-08-04 2015-06-30 13F INTL BUSINESS MACHINES CORP COM 459200101 1,315,989 -261,021 -16.55 214,059 -15.43 0.6823
2015-05-12 2015-03-31 13F INTL BUSINESS MACHINES CORP COM 459200101 1,577,010 -23,793 -1.49 253,110 -1.45 0.7301
2015-02-06 2014-12-31 13F INTL BUSINESS MACHINES CORP COM 459200101 1,600,803 -36,486 -2.23 256,833 -17.37 0.7461
2014-11-12 2014-09-30 13F INTL BUSINESS MACHINES CORP COM 459200101 1,637,289 -56,356 -3.33 310,807 1.24 0.9336
2014-08-06 2014-06-30 13F INTL BUSINESS MACHINES CORP COM 459200101 1,693,645 -124,349 -6.84 307,007 -12.27 0.9010
2014-05-06 2014-03-31 13F INTL BUSINESS MACHINES CORP COM 459200101 1,817,994 -67,484 -3.58 349,946 -1.05 1.0380
2014-02-03 2013-12-31 13F INTL BUSINESS MACHINES CORP COM 459200101 1,885,478 -105,233 -5.29 353,659 -4.06 1.0432
2013-11-05 2013-09-30 13F INTL BUSINESS MACHINES CORP COM 459200101 1,990,711 -55,564 -2.72 368,640 -5.73 1.1423
2013-08-07 2013-06-30 13F INTL BUSINESS MACHINES CORP COM 459200101 2,046,275 2,046,275 391,064 1.2566
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.