Insider holders · CIK 0001410172
Rubicon Technology, Inc. · RBCN
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| Jefferson GrammDirector | 1,230 | 258,256 | 259,486 | Mar 19, 2018 · 5:40 pm EDT | Form 4 |
| Raymond J SpencerDirector | 147,551 | — | 147,551 | Apr 4, 2017 · 6:04 pm EDT | Form 4 |
| Michael E MikolajczykDirector | 71,275 | — | 71,275 | Dec 4, 2018 · 5:34 pm EST | Form 4 |
| Timothy BrogPresident and CEO | 37,000 | — | 37,000 | Jun 13, 2017 · 12:55 pm EDT | Form 4 |
| Hany TamimChief Operating Officer | 36,333 | — | 36,333 | Jan 4, 2017 · 4:40 pm EST | Form 4 |
| Don N AquilanoDirector | 26,287 | — | 26,287 | Oct 3, 2017 · 5:39 pm EDT | Form 4 |
| William F WeissmanPresident and CEO | 14,136 | — | 14,136 | Jan 5, 2015 · 2:26 pm EST | Form 4 |
| Donald R CaldwellDirector | 13,900 | 0 | 13,900 | Nov 20, 2017 · 12:58 pm EST | Form 4 |
| Susan WestphalDirector | 4,038 | — | 4,038 | Mar 19, 2018 · 5:43 pm EDT | Form 4 |
| Mardel A GraffyChief Financial Officer | 284 | 815 | 1,099 | Nov 2, 2017 · 4:02 pm EDT | Form 4 |
| Inga A SlavutskyChief Financial Officer | 276 | — | 276 | Jul 9, 2018 · 4:16 pm EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.