SEC Form 4
International Business Machines Corporation (IBM) insider trading
In the 12 months to Oct 24, 2026, one IBM insider reported open-market sales of $5.8M across 1 filing; 3 insiders bought $417.2K.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $5.8M
- 1 filing · 1 insider
- Open-market purchases
- $417.2K
- 3 filings
Who traded IBM, and when
- Purchase
- Sale
IBM daily close from Oct 24, 2025 to Oct 23, 2026, between $205.77 and $329.23, last $253.56. 1 sale and 3 purchase filings by 4 insiders, marked at their filing dates. Robert David Thomas, Senior Vice President: sold $5.8M across 1 filing, first filed Aug 28, 2026, last Aug 28, 2026. David N. Farr, Director: bought $304.0K across 1 filing, first filed Jan 30, 2026, last Jan 30, 2026. Michael Miebach, Director: bought $101.3K across 1 filing, first filed Feb 25, 2026, last Feb 25, 2026. Michelle J. Howard, Director: bought $11.9K across 1 filing, first filed Feb 25, 2026, last Feb 25, 2026.
Largest mark · tap a row for others
Robert David Thomas · Senior Vice President
Sale $5,758,088
25,000 shares at $230.32 avg
Filed Aug 28, 2026 · traded Aug 26
Close on filing date $235.59
Robert David Thomas · Senior Vice President
Senior Vice President
$5.8M soldDavid N. Farr · Director
Director
$304.0K boughtMichael Miebach · Director
Director
$101.3K boughtMichelle J. Howard · Director
Director
$11.9K boughtHas the International Business Machines Corporation's CEO sold stock?
No. Arvind Krishna (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
4 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Robert David Thomas | Senior Vice President | $5.8M | — | 1 | — | |
| David N. Farr | Director | — | $304.0K | 1 | — | |
| Michael Miebach | Director | — | $101.3K | 1 | — | |
| Michelle J. Howard | Director | — | $11.9K | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Robert David Thomas Senior Vice President | Sale | 25,000 | $230.32 | $5.8M | 47,800 | |
traded | Michelle J. Howard Director | Purchase | 50 | $237.83 | $11.9K | 194 | |
traded | Michael Miebach Director | Purchase | 434 | $233.33 | $101.3K | 434 | |
traded | David N. Farr Director | Purchase | 1,000 | $304.00 | $304.0K | 9,258 |
GET /stocks/filings/vX/form-4?tickers=IBM&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"IBM"
],
"issuer_cik": "0000051143",
"owner_cik": "0002005007",
"accession_number": "0002005007-26-000005",
"form_type": "4",
"filing_date": "2026-08-28",
"period_of_report": "2026-08-26",
"issuer_name": "INTERNATIONAL BUSINESS MACHINES CORP",
"issuer_trading_symbol": "IBM",
"owner_name": "Thomas Robert David",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Senior Vice President",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-08-26",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 25000,
"transaction_price_per_share": 230.3235,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 47800.35,
"transaction_value": 5758087.5,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The price reported in Column 4 is weighted average price. These shares were sold in multiple transactions at prices ranging from $229.835 to $230.69, inclusive. The reporting person undertakes to provide to International Business Machines Corporation (IBM), any security holder of IBM, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4."
}
]
},
{
"tickers": [
"IBM"
],
"issuer_cik": "0000051143",
"owner_cik": "0001769389",
"accession_number": "0001769389-26-000002",
"form_type": "4",
"filing_date": "2026-02-25",
"period_of_report": "2026-02-25",
"issuer_name": "INTERNATIONAL BUSINESS MACHINES CORP",
"issuer_trading_symbol": "IBM",
"owner_name": "HOWARD MICHELLE J",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-02-25",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 50,
"transaction_price_per_share": 237.8293,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 194,
"transaction_value": 11891.465,
"not_subject_to_section_16": false,
"direct_or_indirect": "D"
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 73 records
- Option exercises27 records
- Tax withholding34 records
- Grants and awards7 records
- Gifts5 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for IBM every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.