International Business Machines Corporation
MX ˙ BMV ˙ US4592001014
SecurityMX:IBM / International Business Machines Corporation
InstitutionBoston Private Wealth Llc
Latest Disclosed Ownership28,018 shares
Latest Disclosed Value $ 6,791,200
Boston Private Wealth Llc ownership in IBM / International Business Machines Corporation

On April 17, 2026 - Boston Private Wealth Llc filed a 13F-HR form disclosing ownership of 28,018 shares of International Business Machines Corporation (MX:IBM) valued at $6,791,200 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 37,250 shares of International Business Machines Corporation. This represents a change in shares of -24.78% during the quarter.

Boston Private Wealth Llc has a history of taking positions in derivatives of the underlying security (IBM) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:IBM / International Business Machines Corporation Historical Put/Call Ratio
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)
2026-04-17 2026-03-31 13F INTERNATIONAL BUS MACH CORP COM 459200101 28,018 -9,232 -24.78 6,791 -38.45 0.4474
2026-02-04 2025-12-31 13F INTERNATIONAL BUS MACH CORP COM 459200101 37,250 -4,228 -10.19 11,034 -5.73 0.6505
2025-11-06 2025-09-30 13F INTERNATIONAL BUS MACH CORP COM 459200101 41,478 -7,290 -14.95 11,703 -18.59 0.6298
2025-08-14 2025-06-30 13F INTERNATIONAL BUS MACH CORP COM 459200101 48,768 48,768 14,376 0.7702
2025-05-14 2025-03-31 13F INTERNATIONAL BUS MACH CORP COM 459200101 0 -113,887 -100.00 0 -100.00
2025-02-05 2024-12-31 13F INTERNATIONAL BUS MACH CORP COM 459200101 113,887 113,887 25,036 0.4678
2024-10-18 2024-09-30 13F INTERNATIONAL BUS MACH CORP COM 459200101 0 -125,402 -100.00 0 -100.00
2024-08-06 2024-06-30 13F INTERNATIONAL BUS MACH CORP COM 459200101 125,402 -7,213 -5.44 21,688 -14.36 0.5368
2024-05-15 2024-03-31 13F INTERNATIONAL BUS MACH CORP COM 459200101 132,615 -10,802 -7.53 25,324 7.97 0.5646
2024-01-30 2023-12-31 13F INTERNATIONAL BUS MACH CORP COM 459200101 143,417 -34,186 -19.25 23,456 -5.87 0.5706
2023-10-23 2023-09-30 13F INTERNATIONAL BUS MACH CORP COM 459200101 177,603 -15,880 -8.21 24,918 -3.75 0.5472
2023-07-24 2023-06-30 13F INTERNATIONAL BUS MACH CORP COM 459200101 193,483 -37,361 -16.18 25,890 -14.45 0.4679
2023-05-12 2023-03-31 13F INTERNATIONAL BUS MACH CORP COM 459200101 230,844 4,324 1.91 30,261 -5.18 0.4229
2023-02-10 2022-12-31 13F Intl Business Machines COM 459200101 226,520 -2,860 -1.25 31,914 17.11 0.4308
2022-11-09 2022-09-30 13F Intl Business Machines COM 459200101 229,380 -3,670 -1.57 27,252 -17.18 0.3980
2022-08-16 2022-06-30 13F Intl Business Machines COM 459200101 233,050 -8,390 -3.47 32,905 4.82 0.5061
2022-05-13 2022-03-31 13F Intl Business Machines COM 459200101 241,440 6,510 2.77 31,392 -0.03 0.4204
2022-02-15 2021-12-31 13F Intl Business Machines COM 459200101 234,930 -3,141 -1.32 31,400 -5.07 0.5149
2021-11-09 2021-09-30 13F Intl Business Machines COM 459200101 238,071 8,343 3.63 33,076 -1.78 0.4249
2021-08-13 2021-06-30 13F Intl Business Machines COM 459200101 229,728 27,745 13.74 33,676 25.12 0.4270
2021-05-11 2021-03-31 13F Intl Business Machines COM 459200101 201,983 5,461 2.78 26,916 8.80 0.3749
2021-02-10 2020-12-31 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 196,522 2,002 1.03 24,738 4.53 0.3631
2020-11-10 2020-09-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 194,520 21,995 12.75 23,667 13.59 0.3903
2020-08-05 2020-06-30 13F INTERNATIONAL BUSINESS MACHS C COM 459200101 172,525 132,826 334.58 20,836 373.12 0.3872
2020-05-11 2020-03-31 13F IBM COM 459200101 39,699 -3,125 -7.30 4,404 -23.28 0.1069
2020-02-13 2019-12-31 13F IBM COM 459200101 42,824 -2,687 -5.90 5,740 -13.27 0.1045
2019-11-01 2019-09-30 13F IBM COM 459200101 45,511 -7,129 -13.54 6,618 -8.83 0.1317
2019-07-10 2019-06-30 13F IBM COM 459200101 52,640 -3,881 -6.87 7,259 -8.98 0.2438
2019-05-14 2019-03-31 13F IBM COM 459200101 56,521 -1,767 -3.03 7,975 20.36 0.3150
2019-02-14 2018-12-31 13F IBM COM 459200101 58,288 -8,518 -12.75 6,626 -34.41 0.2827
2018-11-13 2018-09-30 13F IBM COM 459200101 66,806 -2,588 -3.73 10,102 4.21 0.3573
2018-08-14 2018-06-30 13F IBM COM 459200101 69,394 -1,924 -2.70 9,694 -11.41 0.3717
2018-05-11 2018-03-31 13F IBM COM 459200101 71,318 -4,576 -6.03 10,942 -6.02 0.4197
2018-02-13 2017-12-31 13F IBM COM 459200101 75,894 -2,534 -3.23 11,643 2.32 0.4380
2017-11-13 2017-09-30 13F IBM COM 459200101 78,428 -13,545 -14.73 11,379 -19.57 0.4376
2017-08-04 2017-06-30 13F IBM COM 459200101 91,973 -33,192 -26.52 14,148 -35.09 0.5551
2017-05-11 2017-03-31 13F IBM COM 459200101 125,165 -4,201 -3.25 21,797 1.51 0.8682
2017-02-15 2016-12-31 13F IBM COM 459200101 129,366 -4,559 -3.40 21,473 0.94 0.8885
2016-11-15 2016-09-30 13F/A-1 IBM COM 459200101 133,925 -3,011 -2.20 21,274 2.36 0.8652
2016-11-14 2016-09-30 13F IBM COM 459200101 136,936 0 20,784 0.8479
2016-08-01 2016-06-30 13F IBM COM 459200101 136,936 12,875 10.38 20,784 10.62 0.8479
2016-05-13 2016-03-31 13F IBM COM 459200101 124,061 -5,456 -4.21 18,789 5.41 0.7650
2016-02-12 2015-12-31 13F IBM COM 459200101 129,517 -7,553 -5.51 17,824 -10.30 0.7031
2015-11-12 2015-09-30 13F IBM COM 459200101 137,070 -19,695 -12.56 19,871 -22.07 0.7702
2015-08-13 2015-06-30 13F IBM COM 459200101 156,765 -2,600 -1.63 25,500 -0.30 0.8439
2015-05-12 2015-03-31 13F IBM COM 459200101 159,365 -2,942 -1.81 25,578 -1.78 0.8258
2015-02-10 2014-12-31 13F IBM COM 459200101 162,307 162,307 26,041 0.8421
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2015-11-12 2015-09-30 13F IBM COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-08-13 2015-06-30 13F IBM COM Call 8,000 1,301 n/a n/a n/a
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.