IBM Corp IBM
Ownership & positioning
Who holds it, who is betting against it, and where the big money is moving
Short-sale volume as % of daily volume
Large-order net flow, last 20 sessions
Net of large-order buying minus selling, in USD. Over this window: +$18.28M (13 inflow days, 7 outflow days).
Net flow by order size, last 20 sessions
Super/Big orders approximate institutional-size trades; Mid/Small approximate retail-size trades. Net buy minus sell value in each bucket, summed over the window.
The five largest holders on file together own 26.6% of shares outstanding.
Largest holders
By investor type
Reported short interest has fallen from 2.36% to 2.11% of float over the last 6 biweekly reports (31 Jul 2026 to 15 Oct 2026).
Recent institutional activity
| Holder | Type | Period | Share change | New stake |
|---|---|---|---|---|
| Assenagon Asset Management S.A. | Mutual Fund | 2026/Q3 | +571,332 | 0.1% |
| Wellington Management Group | Mutual Fund | 2026/Q3 | +6,283,395 | 0.7% |
| BNY Mellon Asset Management | Mutual Fund | 2026/Q3 | +2,006,794 | 1.0% |
| FMR | Mutual Fund | 2026/Q3 | +1,540,876 | 0.5% |
| State Street Global Advisors | Mutual Fund | 2026/Q3 | +1,450,562 | 5.9% |
| Marshall Wace LLP | Hedge Fund | 2026/Q3 | +1,414,891 | 0.2% |
| National Bank Investments Inc. | Mutual Fund | 2026/Q3 | +1,152,754 | 0.2% |
| AQR Capital Management | Hedge Fund | 2026/Q3 | +774,601 | 0.3% |
| Wells Fargo & Company | Public Company | 2026/Q3 | +741,103 | 0.5% |
| Vanguard Portfolio Management, LLC | Mutual Fund | 2026/Q3 | +687,429 | 3.0% |
| Strategic Advisers LLC | Mutual Fund | 2026/Q3 | +646,582 | 0.3% |
| Susquehanna International Group, LLP | Private Company | 2026/Q3 | +587,935 | 0.1% |
| Vanguard Capital Management, LLC | Mutual Fund | 2026/Q3 | +553,843 | 7.1% |
| Alyeska Investment Group, L.P. | Hedge Fund | 2026/Q3 | +449,621 | 0.0% |
| Dimensional Fund Advisors | Mutual Fund | 2026/Q3 | +446,759 | 0.6% |
Institutional buy/sell activity by reporting period, largest moves first.
Insider transactions
| Date | Insider | Title | Transaction | Shares | Price | Held after |
|---|---|---|---|---|---|---|
| 29 Sep 2026 | David Farr | Independent Director | Other Derivative Acquisition | +268 | – | 23,782 |
| 29 Sep 2026 | Alfred Zollar | Independent Director | Other Derivative Acquisition | +415 | – | 10,427 |
| 29 Sep 2026 | Peter Voser | Independent Director | Other Derivative Acquisition | +455 | – | 33,290 |
| 29 Sep 2026 | Andrew Liveris | Independent Director | Other Derivative Acquisition | +444 | – | 45,262 |
| 29 Sep 2026 | Alex Gorsky | Lead Independent Director | Other Derivative Acquisition | +489 | – | 35,343 |
| 29 Sep 2026 | Frederick McNabb | Independent Director | Other Derivative Acquisition | +415 | – | 17,053 |
| 29 Sep 2026 | Marianne Brown | Independent Director | Other Derivative Acquisition | +415 | – | 4,460 |
| 29 Sep 2026 | Michael Miebach | Independent Director | Other Derivative Acquisition | +415 | – | 4,724 |
| 29 Sep 2026 | Ramon Laguarta | Independent Director | Other Derivative Acquisition | +415 | – | 869 |
| 29 Sep 2026 | Thomas Buberl | Independent Director | Other Derivative Acquisition | +444 | – | 15,256 |
| 29 Sep 2026 | Martha Pollack | Independent Director | Other Derivative Acquisition | +268 | – | 17,899 |
| 29 Sep 2026 | Michelle Howard | Independent Director | Other Derivative Acquisition | +291 | – | 17,050 |
| 26 Aug 2026 | Arvind Krishna | Chief Executive Officer | Derivative Acquisition Under Emp | +8,375 | – | 28,447 |
| 25 Aug 2026 | Robert Thomas | Senior VP of IBM Software & Chief Commercial Officer | Open Market Disposition | -25,000 | $230.32 | 65,800 |
| 30 Jun 2026 | Anne Robinson | Chief Legal Officer | Derivative Exercise and Sale | -4,035 | $286.73 | 13,648 |
| 30 Jun 2026 | Anne Robinson | Chief Legal Officer | Derivative Exercise and Retained | +3,260 | – | 13,648 |
| 29 Jun 2026 | David Farr | Independent Director | Other Derivative Acquisition | +209 | – | 23,346 |
| 29 Jun 2026 | Alfred Zollar | Independent Director | Other Derivative Acquisition | +325 | – | 9,940 |
| 29 Jun 2026 | Peter Voser | Independent Director | Other Derivative Acquisition | +356 | – | 32,600 |
| 29 Jun 2026 | Andrew Liveris | Independent Director | Other Derivative Acquisition | +347 | – | 44,497 |
From Form 4/Form 144 filings. Negative share counts are disposals (sales, gifts, or shares withheld for taxes); positive are acquisitions.
Short interest, by report
| Report date | Shares short | % of float | Days to cover |
|---|---|---|---|
| 15 Oct 2026 | 19,911,577 | 2.1% | 3.6 |
| 30 Sep 2026 | 24,164,783 | 2.6% | 4.1 |
| 15 Sep 2026 | 22,444,940 | 2.4% | 4.6 |
| 31 Aug 2026 | 22,016,017 | 2.3% | 4.5 |
| 14 Aug 2026 | 22,050,277 | 2.3% | 3.8 |
| 31 Jul 2026 | 22,269,760 | 2.4% | 1.8 |
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