10% Owner Purchases
Purchases by beneficial owners holding 10% or more of a company's stock. These large shareholders have significant economic stakes and often deep industry expertise.
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Key Insights
24 companies show 10% owner buys activity. Summit Therapeutics Inc. (SMMT) leads with $102.9M in total transaction value from 2 unique insiders. The average transaction value per company is $5.9M. Data sourced from SEC EDGAR Form 4 filings.
Why This Matters
Beneficial owners holding 10%+ of a company's shares have significant economic exposure, meaning their transactions carry outsized financial consequences. These holders include activist investors, private equity firms, and founder-owners, each with distinct motivations. Their purchases can reflect conviction in the company's value and may precede catalytic events such as strategic changes, board reconstitution, or capital allocation shifts.
24 companies have purchases by 10%+ beneficial owners, with a combined value of $141.4M. The largest by value is at Summit Therapeutics Inc. (SMMT), where Zanganeh Mahkam purchased $102.9M worth of shares.
Beneficial owners holding 10%+ of a company's shares have significant economic exposure, making their transactions carry outsized financial consequences. These holders include activist investors, private equity firms, and founder-owners — each with distinct motivations and time horizons. Their purchases may reflect conviction in the company's intrinsic value and may coincide with or follow strategic changes, board reconstitution, or shareholder proposals.
Form 4 filings are required to be filed within 2 business days of a transaction. Some transactions may be part of pre-planned 10b5-1 trading plans. Insider trading data reflects SEC EDGAR public filings and may not capture the full context of each transaction.
- -Currently tracking 24 companies with ten percent owner trades activity
- -Total transaction value: $141.4M
- -Most recent filing: Jun 18
- -Top owner: Zanganeh Mahkam at Summit Therapeutics Inc.
This is a factual summary of SEC EDGAR filings and does not constitute investment advice.
24 Companies with Insider Activity
| # | Company | Top Insider | Transactions | Total Value | Insiders | Latest |
|---|---|---|---|---|---|---|
| 1 | SMMTSummit Therapeutics Inc. | Zanganeh Mahkam Co-Chief Executive Officer | 4 | $102.9M | 2 | Jun 12 |
| 2 | WGSGeneDx Holdings Corp. | Casdin Capital, LLC | 2 | $11.1M | 1 | Jun 5 |
| 3 | PARPAR TECHNOLOGY CORP | Voss Capital, LP | 18 | $5.1M | 1 | Jun 12 |
| 4 | COE51Talk Online Education Group | Huang Jack Jiajia Chief Executive Officer | 6 | $4.6M | 1 | Jun 15 |
| 5 | RYANRyan Specialty | RYAN PATRICK G Executive Chairman | 1 | $3.9M | 1 | Jun 5 |
| 6 | HLNEHamilton Lane | Rogers Hartley R. Executive Co-Chairman | 3 | $3.1M | 2 | Jun 11 |
| 7 | CRVOCervoMed Inc. | BOGER JOSHUA S | 1 | $3.0M | 1 | Jun 11 |
| 8 | HTOH2O America | ATLAS Infrastructure Partners (UK) Ltd. | 1 | $1.8M | 1 | May 29 |
| 9 | AATAmerican Assets Trust | RADY ERNEST S Executive Chairman | 7 | $1.5M | 1 | Jun 15 |
| 10 | ERIEErie Indemnity | Vorsheck Elizabeth A | 3 | $1.4M | 1 | Jun 2 |
| 11 | GPGIGPGI, Inc. | Knott Thomas R. See remarks | 1 | $995K | 1 | Jun 11 |
| 12 | DGICADONEGAL GROUP INC | DONEGAL MUTUAL INSURANCE CO | 6 | $943K | 1 | Jun 12 |
| 13 | NRDYNerdy Inc. | Cohn Charles K. Chief Executive Officer | 2 | $501K | 1 | Jun 15 |
| 14 | CMCLCaledonia Mining Corp Plc | Gapare Victor | 1 | $220K | 1 | Jun 11 |
| 15 | GSHDGoosehead Insurance, Inc. | Langston Patrick Ryan | 1 | $100K | 1 | May 29 |
| 16 | ESOAEnergy Services of America CORP | REYNOLDS DOUGLAS V President | 1 | $98K | 1 | Jun 18 |
| 17 | ADTXAditxt, Inc. | HRT FINANCIAL LP | 4 | $68K | 2 | Jun 12 |
| 18 | ACOGAlpha Cognition Inc. | Opaleye Management Inc. | 3 | $46K | 1 | Jun 15 |
| 19 | DLHCDLH Holdings Corp. | Mink Brook Asset Management LLC | 2 | $36K | 1 | Jun 17 |
| 20 | BNKKBONK, INC. | Rudy Mitchell Austin | 1 | $16K | 1 | Jun 10 |
| 21 | VGVenture Global, Inc. | Sabel Michael See Remarks | 1 | $16K | 1 | Jun 12 |
| 22 | NYCAmerican Strategic Investment Co. | SCHORSCH NICHOLAS S | 1 | $12K | 1 | Jun 15 |
| 23 | TPLTexas Pacific Land Corporation | HORIZON KINETICS ASSET MANAGEMENT LLC | 15 | $6K | 1 | Jun 18 |
| 24 | BACBank of America | BANK OF AMERICA CORP /DE/ | 3 | $0 | 1 | Jun 11 |
Understanding 10% Owner Trades
SEC regulations require anyone holding 10% or more of a company's shares to report transactions via Form 4. These large holders include activist investors, private equity firms, and founder-owners. Their purchases can signal both conviction in the company and potential catalysts such as strategic changes or value-unlocking events.
All insider trading data is sourced from SEC EDGAR Form 4 filings, which are public domain documents. Transaction classification (purchase vs. sale) follows SEC reporting standards. Some transactions may be delayed due to SEC filing timelines.
Related Screeners
Frequently Asked Questions
What is an insider trading screener?
An insider trading screener filters stocks based on corporate insider buying and selling activity. Corporate insiders (officers, directors, and 10%+ shareholders) must report their transactions to the SEC via Form 4 filings. This screener aggregates that data to help you identify patterns like cluster buying, CEO purchases, and large transactions.
Where does Billiver get insider trading data?
All insider trading data comes from SEC EDGAR Form 4 filings, which are public domain documents. When a corporate insider buys or sells company stock, they must file a Form 4 with the SEC within two business days. Billiver processes these filings daily to provide up-to-date screener results.
What is the difference between insider buying and insider selling?
Insider buying is generally considered a stronger signal than insider selling. Insiders buy for one reason: they expect the stock to go up. However, insiders sell for many non-negative reasons including diversification, tax planning, home purchases, or exercising expiring options. Academic research consistently finds insider purchases are more predictive of future returns than sales.
What are insider cluster buys?
A cluster buy occurs when 3 or more unique insiders at the same company purchase shares within a 30-day period. Research by Jaffe (1974) and subsequent studies found that cluster buying is more predictive of abnormal returns (approximately 2.1%) than individual insider purchases. The screener excludes pre-planned 10b5-1 transactions to focus on discretionary buying decisions.
Are 10b5-1 plan transactions included?
For purchase-related screeners (latest purchases, CEO buys, cluster buys, etc.), pre-planned 10b5-1 transactions are excluded. These are automated trading plans set up in advance and do not reflect real-time insider sentiment. Sale screeners include all transactions since most insider sales are routine.