Alto Ingredients Inc
Ownership
Ownership Structure
Who owns Alto Ingredients Inc (ALTO)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 89.3% of the shares are freely tradable; institutional investors hold 59.9%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Marshall Wace Asset Management Ltd | 4.30 | 3,337,356 | +189.2 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.10 | 3,180,211 | +0.0 | 03/31/2026 |
| Arrowstreet Capital Limited Partnership | 2.31 | 1,790,263 | +67.9 | 03/31/2026 |
| Hillsdale Investment Management Inc. | 2.20 | 1,703,703 | +70.3 | 06/30/2026 |
| Renaissance Technologies Corp | 2.16 | 1,673,657 | +9.8 | 03/31/2026 |
| BlackRock Inc | 1.67 | 1,298,085 | +10.1 | 03/31/2026 |
| Jane Street Group LLC | 1.67 | 1,291,477 | +64.6 | 03/31/2026 |
| Two Sigma Investments LLC | 1.55 | 1,198,890 | -40.3 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.88 | 2,230,593 | +0.0 | 08/31/2026 |
| iShares Russell 2000 ETF | 2.47 | 1,919,609 | -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 |
|---|---|---|---|---|---|
| Nathan Gilbert E | Director | 866,393 | 3,205,654 $ | Sep 14, 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 14, 2026 | Nathan Gilbert E | Director | Buy | 10,000 | 3.93 | 39,299 |
| Aug 11, 2026 | Nathan Gilbert E | Director | Buy | 50,000 | 4.15 | 207,500 |
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 28, 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.