RBCN — RUBICON TECHNOLOGY INC
RBCN (RUBICON TECHNOLOGY INC) is tracked on HoldingsHub across five years of quarterly 13F filings. 11 funds have reported positions historically, with the sum of their latest reported stakes valued at $964.00K. No fund in our coverage reported a position in the latest filing period, which typically means the stock has fallen out of the tracked funds' portfolios rather than that it cannot be bought.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
Q3 2022 — 7 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Renaissance Technologies history | 90.67K | $194.00K | 0.00% | Reduce |
| Citadel Advisors history | 21.41K | $46.00K | 0.00% | New |
| Millennium Management history | 10.53K | $23.00K | 0.00% | New |
| Geode Capital Management history | 10.42K | $22.00K | 0.00% | Reduce |
| Morgan Stanley history | 3.15K | $7.00K | 0.00% | New |
| UBS Group AG history | 57 | $0 | — | Reduce |
| Wells Fargo & Co history | 11 | $0 | — | Reduce |
Q2 2022 — 7 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Renaissance Technologies history | 94.68K | $870.00K | 0.00% | Reduce |
| Vanguard Group history | 72.66K | $668.00K | 0.00% | Reduce |
| Geode Capital Management history | 11.84K | $108.00K | 0.00% | Add |
| UBS Group AG history | 680 | $6.00K | 0.00% | Add |
| Citigroup Inc history | 363 | $3.00K | 0.00% | New |
| JPMorgan Chase & Co history | 141 | $1.00K | 0.00% | Reduce |
| Wells Fargo & Co history | 15 | $0 | — | Add |
Q1 2022 — 7 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Renaissance Technologies history | 96.78K | $898.00K | 0.00% | Reduce |
| Vanguard Group history | 74.30K | $690.00K | 0.00% | Reduce |
| Geode Capital Management history | 11.57K | $104.00K | 0.00% | Hold |
| Morgan Stanley history | 348 | $3.00K | 0.00% | Reduce |
| JPMorgan Chase & Co history | 326 | $3.00K | 0.00% | Hold |
| UBS Group AG history | 107 | $1.00K | 0.00% | Hold |
| Wells Fargo & Co history | 14 | $0 | — | Hold |
Q4 2021 — 8 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Renaissance Technologies history | 99.48K | $892.00K | 0.00% | Reduce |
| Vanguard Group history | 80.84K | $725.00K | 0.00% | Reduce |
| Geode Capital Management history | 11.57K | $103.00K | 0.00% | Hold |
| Morgan Stanley history | 750 | $7.00K | 0.00% | Reduce |
| JPMorgan Chase & Co history | 326 | $3.00K | 0.00% | Hold |
| UBS Group AG history | 107 | $1.00K | 0.00% | Hold |
| Bank of America Corp history | 3 | $0 | — | Reduce |
| Wells Fargo & Co history | 14 | $0 | — | Hold |
Q3 2021 — 8 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Renaissance Technologies history | 103.58K | $1.05M | 0.00% | New |
| Vanguard Group history | 96.75K | $976.00K | 0.00% | Hold |
| Geode Capital Management history | 11.57K | $117.00K | 0.00% | New |
| Morgan Stanley history | 757 | $8.00K | 0.00% | New |
| JPMorgan Chase & Co history | 326 | $3.00K | 0.00% | New |
| Bank of America Corp history | 85 | $1.00K | 0.00% | New |
| UBS Group AG history | 107 | $1.00K | 0.00% | New |
| Wells Fargo & Co history | 14 | $0 | — | New |
Q2 2021 — 1 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Vanguard Group history | 96.75K | $919.00K | 0.00% | Hold |
New Positions (latest)
No fund opened a new position this quarter.
Fully Exited (vs previous quarter)
No tracked fund fully exited this quarter.
Fund Position History — shares by quarter (top 11 funds)
| Fund | Q3 2022 | Q2 2022 | Q1 2022 | Q4 2021 | Q3 2021 | Q2 2021 | Q1 2021 |
|---|---|---|---|---|---|---|---|
| Renaissance Technologies | 90.67K | 94.68K | 96.78K | 99.48K | 103.58K | — | — |
| Citadel Advisors | 21.41K | — | — | — | — | — | — |
| Millennium Management | 10.53K | — | — | — | — | — | — |
| Geode Capital Management | 10.42K | 11.84K | 11.57K | 11.57K | 11.57K | — | — |
| Morgan Stanley | 3.15K | — | 348 | 750 | 757 | — | — |
| JPMorgan Chase & Co | — | 141 | 326 | 326 | 326 | — | — |
| Bank of America Corp | — | — | — | 3 | 85 | — | — |
| Citigroup Inc | — | 363 | — | — | — | — | — |
| UBS Group AG | 57 | 680 | 107 | 107 | 107 | — | — |
| Vanguard Group | — | 72.66K | 74.30K | 80.84K | 96.75K | 96.75K | 96.75K |
| Wells Fargo & Co | 11 | 15 | 14 | 14 | 14 | — | — |