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.
Key figures
- Insider buys
- 0
- Open market, last 90 days
- Insider sells
- 0
- Open market, last 90 days
- 13F holders
- 20
- Q3 2022, +2 vs. previous quarter
- 13F value
- $867.3K
- Reported value at the end of Q3 2022
- Superinvestors holding
- 0
- At the end of Q3 2022
Superinvestors holding RBCN, Q3 2022
No superinvestor reported holding RBCN at the end of Q3 2022.
Latest insider trades
Open-market purchases and sales by Rubicon Technology, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Feb 24, 2023 (view filing) | Feb 22 | 2 days | Brog TimothyDirector | SSale | −52.6K | $1.51 | −$79.5K | −91.4%4.97K after | |
| Aug 23, 2022 (view filing)4:23 PM ET | Aug 19 | 4 days | Gramm Jefferson and 2 othersDirector, 10% Owner, Other: See Footnote 1 | SSaleCommon Stock, $0.001 Par Value Per Share | −3.06K | $20.00 | −$61.2K | −50.3%3.02K after | |
| Aug 23, 2022 (view filing)4:23 PM ET | Aug 19 | 4 days | Gramm Jefferson and 2 othersDirector, 10% Owner, Other: See Footnote 1 | SSaleCommon Stock, $0.001 Par Value Per Share | −129.9K | $20.00 | −$2.60M | −50.3%128.3K after | |
| Aug 22, 2022 (view filing) | Aug 19 | 3 days | Brog TimothyChief Executive Officer | SSale | −58.3K | $20.00 | −$1.17M | −50.3%57.6K after | |
| Aug 22, 2022 (view filing) | Aug 19 | 3 days | Mikolajczyk Michael EDirector | SSale | −31.9K | $20.00 | −$637.0K | −50.3%31.5K after | |
| Aug 22, 2022 (view filing) | Aug 19 | 3 days | Westphal SusanDirector | SSale | −4.47K | $20.00 | −$89.4K | −50.3%4.42K after |
Top 10 13F holders, Q3 2022
The largest institutional positions in Rubicon Technology, Inc. at the end of Q3 2022; 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 |