Graham Corporation
Ownership
Ownership Structure
Who owns Graham Corporation (GHM)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 95.2% of the shares are freely tradable; institutional investors hold 80.2%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Brandes Investment Partners & Co | 9.20 | 1,079,699 | -7.8 | 06/30/2026 |
| BlackRock Inc | 6.53 | 766,677 | -1.3 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.87 | 453,812 | +0.0 | 03/31/2026 |
| Royce & Associates, LP | 3.82 | 448,758 | -5.0 | 03/31/2026 |
| Arnhold & S. Bleichroeder Advisers, LLC | 3.31 | 388,226 | +80.1 | 06/30/2026 |
| William Blair Investment Management, LLC | 3.11 | 364,800 | +16.1 | 06/30/2026 |
| Driehaus Capital Management LLC | 2.92 | 342,908 | -3.4 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| First Trust RBA Amer Indl RenaisTM ETF | 4.69 | 550,073 | +0.1 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.01 | 352,696 | +1.2 | 07/31/2026 |
| iShares Russell 2000 ETF | 2.33 | 273,635 | -0.6 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Gregorio Mauro | Director | 2,136 | 178,570 $ | Sep 2, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 2, 2026 | Gregorio Mauro | Director | Other | 936 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.