GRI Bio, Inc. (GRI) Ownership
GRI ownership summary
as of October 17, 2026- Institutions
- 4.3% of shares outstanding
- Insiders
- 0.38% of shares outstanding
- Shares outstanding
- 2.2M
- Float
- 2.2M shares available to trade
- Short interest
- 3.18% 69K shares short
- Days to cover
- 0.13 short interest down 40.7% vs prior month
- Institutions 4.28%
- Insiders 0.38%
- Other investors 95.34%
GRI top institutional holders
13 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | HRT FINANCIAL LLC | 1.32% | 29K | $39,722 | +28,784 (0.0%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 0.98% | 21K | $29,488 | +21,368 (0.0%) | June 30, 2026 |
| 3 | Geode Capital Management, LLC | 0.63% | 14K | $19,139 | −4,569 (−24.8%) | June 30, 2026 |
| 4 | Citadel Advisors Llc | 0.61% | 13K | $18,459 | +13,376 (0.0%) | June 30, 2026 |
| 5 | Morgan Stanley - Brokerage Accounts | 0.40% | 8,737 | $12,057 | +8,737 (0.0%) | June 30, 2026 |
| 6 | UBS Group AG | 0.23% | 4,920 | $6,790 | −3,802 (−43.6%) | June 30, 2026 |
| 7 | Tower Research Capital LLC | 0.11% | 2,434 | $3,359 | +1,374 (+129.6%) | June 30, 2026 |
| 8 | Barclays PLC | <0.01% | 83 | $115 | +83 (0.0%) | June 30, 2026 |
| 9 | BlackRock Inc | <0.01% | 7 | $10 | — | June 30, 2026 |
| 10 | Caitong International Asset Management Co., Limited. | <0.01% | 2 | $3 | +2 (0.0%) | June 30, 2026 |
| 11 | Danske Bank A/S. | <0.01% | 2 | $3 | — | June 30, 2026 |
| 12 | SBI Securities Co Ltd | 0.00% | — | — | −4 (−100.0%) | June 30, 2026 |
| 13 | Bank of America Corp | 0.00% | — | — | −1 (−100.0%) | March 31, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 13, 7 holders added 74K shares and 4 cut 8,376.
GRI top mutual fund and ETF holders
2 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Fidelity Extended Market Index | 0.42% | 9,173 | $12,659 | — | August 31, 2026 |
| 2 | Fidelity Series Total Market Index | 0.04% | 872 | $1,203 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
GRI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns GRI
Institutional investors own 4.3% of GRI Bio's shares and insiders 0.38%. The largest holder is HRT FINANCIAL LLC with 1.32% of the shares (29K), as of June 30, 2026. Among the top 13 institutions, 7 added shares and 4 reduced their stake in the latest filings. Short interest is 3.18% of the float, or 0.13 days of average trading volume. The share count rose 55,200.0% since 2019.
Related: GRI analyst forecast, GRI key metrics. See the GRI stock overview for the latest quote and news.
GRI ownership FAQ
Who owns the most GRI Bio stock?
The largest shareholders of GRI Bio are HRT FINANCIAL LLC (1.32%), Vanguard Capital Management, LLC (0.98%), Geode Capital Management, LLC (0.63%), Citadel Advisors Llc (0.61%), Morgan Stanley - Brokerage Accounts (0.40%).
What percentage of GRI Bio is owned by institutions?
Institutions hold 4.3% of GRI Bio's shares outstanding; insiders hold 0.38%.
Which funds own GRI Bio?
The largest fund holders of GRI Bio are Fidelity Extended Market Index (0.42%), Fidelity Series Total Market Index (0.04%).
What is GRI Bio's short interest?
69K shares of GRI Bio were sold short, 3.18% of the float; at the average daily volume it would take 0.13 days to cover.
How many shares of GRI Bio are outstanding?
GRI Bio has 2.2M shares outstanding, of which 2.2M are in the public float.