Rubicon Technology, Inc.
RBCNDelisted Dec 23, 2022- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0001410172
Rubicon Technology, Inc. was delisted on Dec 23, 2022; its insiders filed their last Form 4 on Feb 24, 2023; 20 institutions reported holding it in 13F filings for Q3 2022, worth $867.3K in total; no superinvestor held it.
13F holders, Q3 2022
Institutional positions in Rubicon Technology, Inc. as of Sep 30, 2022. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
RBCN is no longer listed, so this page shows Q3 2022. 13F filings for later quarters list far fewer holders.
- Institutional holders
- 20
- +2 vs. Q2 2022
- Shares held
- 405.0K
- −97.4K (−19.4%) vs. Q2 2022
- Total value
- $867.3K
- −$3.75M (−81.2%) vs. Q2 2022
- New holders
- 7
- 1 more added
- Sold out
- 5
- 7 more reduced
Compare with Q2 2022: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting RBCN on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 0 | $0 |
| Q1 2026 | 0 | $0 |
| Q4 2025 | 0 | $0 |
| Q3 2025 | 0 | $0 |
| Q2 2025 | 0 | $0 |
| Q1 2025 | 0 | $0 |
| Q4 2024 | 0 | $0 |
| Q3 2024 | 0 | $0 |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 1 | $126 |
| Q4 2023 | 1 | $117 |
| Q3 2023 | 1 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 4 | $256.5K |
| Q3 2022 | 20 | $867.3K |
| Q2 2022 | 18 | $4.62M |
| Q1 2022 | 17 | $4.81M |
| Q4 2021 | 20 | $4.78M |
| Q3 2021 | 18 | $5.58M |
| Q2 2021 | 20 | $5.52M |
| Q1 2021 | 21 | $6.45M |
Institutions, Q3 2022
Shares, value and share of portfolio for each institution holding Rubicon Technology, Inc.; share changes are against Q2 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Bandera Partners LLC | 128,323 | $275.0K | 0.12% | −129,933−50.3% | Reduced |
| Renaissance Technologies LLC | 90,671 | $194.0K | 0.00% | −4,008−4.2% | Reduced |
| CSS LLC | 46,654 | $100.0K | 0.01% | +46,654 | New |
| Ameriprise Financial Inc | 35,339 | $76.0K | 0.00% | +35,339 | New |
| Ellsworth Advisors, LLC | 25,127 | $54.0K | 0.02% | +25,127 | New |
| Citadel Advisors LLC | 21,412 | $46.0K | 0.00% | +21,412 | New |
| BlackRock Inc. | 20,137 | $43.0K | 0.00% | −20,905−50.9% | Reduced |
| Millennium Management LLC | 10,529 | $23.0K | 0.00% | +10,529 | New |
| Geode Capital Management, LLC | 10,419 | $22.0K | 0.00% | −1,424−12.0% | Reduced |
| Advisor Group Holdings, Inc. | 6,979 | $15.0K | 0.00% | −4,341−38.3% | Reduced |
| Tower Research Capital LLC (TRC) | 5,237 | $11.0K | 0.00% | +4,712+897.5% | Added |
| Morgan Stanley | 3,147 | $7.00K | 0.00% | +3,147 | New |
| AlphaMark Advisors, LLC | 500 | $1.00K | 0.00% | 00.0% | Unchanged |
| Leonteq Securities AG | 147 | $315 | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 57 | $0 | 0.00% | −623−91.6% | Reduced |
| Rockefeller Capital Management L.P. | 220 | $0 | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 11 | $0 | 0.00% | −4−26.7% | Reduced |
| Credit Suisse AG | 26 | $0 | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 1 | $0 | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 82 | $0 | 0.00% | +82 | New |
| Vanguard Group Inc | 0 | $0 | 0.00% | −72,664−100.0% | Sold out |
| Marquette Asset Management, LLC | 0 | $0 | 0.00% | −9,921−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −363−100.0% | Sold out |
| JPMorgan Chase & Co | 0 | $0 | 0.00% | −141−100.0% | Sold out |
| West Bancorporation Inc | 0 | $0 | 0.00% | −100−100.0% | Sold out |