Rubicon Technology, Inc. RBCN
4.76 USD 0.00 (+0.00%)
Nov 4, 2026, 3:53 PM EST
4.76 Day range 4.76
2.55 52-week range 6.70
- YTD
- +73.09%
- 1 year
- +12.53%
Ownership
Held by insiders 3.92%
Held by institutions 26.68%
Float held by institutions 27.77%
Institutions 24
Top institutional holders
| Holder | % held | Shares | Value | Reported |
|---|---|---|---|---|
| Bandera Partners LLC | 5.21% | 128,323 | 192.48K | Sep 29, 2022 |
| Renaissance Technologies, LLC | 3.68% | 90,671 | 136.01K | Sep 29, 2022 |
| CSS LLC | 1.89% | 46,654 | 69.98K | Sep 29, 2022 |
| Ameriprise Financial, Inc. | 1.43% | 35,339 | 53.01K | Sep 29, 2022 |
| Citadel Advisors Llc | 0.87% | 21,412 | 32.12K | Sep 29, 2022 |
| Blackrock Inc. | 0.82% | 20,137 | 30.20K | Sep 29, 2022 |
Top mutual fund holders
| Holder | % held | Shares | Value | Reported |
|---|---|---|---|---|
| Fidelity Extended Market Index Fund | 0.26% | 6,312 | 9.47K | Nov 29, 2022 |
| Fidelity Series Total Market Index Fund | 0.08% | 2,032 | 3.05K | Nov 29, 2022 |
| Fidelity Total Market Index Fund | 0.05% | 1,323 | 1.98K | Nov 29, 2022 |
| DFA U.S. Micro Cap Series | 0.04% | 997 | 1.50K | Oct 30, 2022 |
| DFA U.S. Core Equity 2 Portfolio | 0.03% | 713 | 1.07K | Oct 30, 2022 |
| DFA U.S. Core Equity 1 Portfolio | 0.02% | 568 | 852 | Oct 30, 2022 |
Insiders
| Insider | Relation | Latest transaction | Date | Shares held |
|---|---|---|---|---|
| AQUILANO DON N | Director | Stock Award(Grant) | Sep 28, 2017 | 26,287 |
| BROG TIMOTHY E | Chief Executive Officer | Sale | Aug 18, 2022 | 57,593 |
| CALDWELL DONALD R. CPA | Director | Sale | Nov 15, 2017 | 0 |
| GRAFFY MARDEL A | Chief Financial Officer | Conversion of Exercise of derivative security | Oct 31, 2017 | 1,099 |
| GRAMM JEFFERSON | Director and Beneficial Owner of more than 10% of a Class of Security | Sale | Aug 18, 2022 | 0 |
| MIKOLAJCZYK MICHAEL E | Director | Sale | Aug 18, 2022 | 31,456 |