Rubicon Technology, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Brog Timothy | — | Sale | 52,624 | $1.51 | $79,462 | 4,969 | Feb 22, 2023 |
| Bandera Partners LLC | — | Sale | 3,059 | $20.00 | $61,180 | 3,021 | Aug 19, 2022 |
| Brog Timothy | Chief Executive Officer | Sale | 58,315 | $20.00 | $1,166,300 | 57,593 | Aug 19, 2022 |
| MIKOLAJCZYK MICHAEL E | — | Sale | 31,851 | $20.00 | $637,020 | 31,456 | Aug 19, 2022 |
| Westphal Susan | — | Sale | 4,472 | $20.00 | $89,440 | 4,416 | Aug 19, 2022 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 1,010 | — | — | 63,307 | Jul 29, 2022 |
| Gramm Jefferson | — | Award / Grant | 1,010 | — | — | 5,454 | Jul 29, 2022 |
| Westphal Susan | — | Award / Grant | 1,010 | — | — | 8,888 | Jul 29, 2022 |
| Brog Timothy | Chief Executive Officer | Option Exercise | 12,500 | — | — | 122,254 | Jul 18, 2022 |
| Brog Timothy | Chief Executive Officer | Option Exercise | 12,500 | — | — | 116,100 | Jul 13, 2022 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 1,250 | — | — | 62,297 | Jun 23, 2021 |
| Westphal Susan | — | Award / Grant | 1,250 | — | — | 7,878 | Jun 23, 2021 |
| Gramm Jefferson | — | Award / Grant | 1,250 | — | — | 4,444 | Jun 23, 2021 |
| Brog Timothy | President and CEO | Tax Withholding | 14,950 | $10.81 | $161,610 | 103,600 | Apr 6, 2021 |
| Brog Timothy | President and CEO | Option Exercise | 17,280 | — | — | 92,280 | Oct 19, 2020 |
| Gramm Jefferson | — | Award / Grant | 1,199 | — | — | 3,194 | Jul 15, 2020 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 1,199 | — | — | 61,047 | Jul 15, 2020 |
| Westphal Susan | — | Award / Grant | 1,199 | — | — | 6,628 | Jul 15, 2020 |
| Brog Timothy | President and CEO | Tax Withholding | 21,000 | $9.09 | $190,890 | 75,000 | Sep 30, 2019 |
| Brog Timothy | Chief Executive Officer | Purchase | 2,051 | $8.08 | $16,572 | 47,000 | Jun 11, 2019 |
| MIKOLAJCZYK MICHAEL E | — | Disposition | 12,818 | $8.12 | $104,082 | 59,848 | Jun 10, 2019 |
| Brog Timothy | Chief Executive Officer | Purchase | 7,600 | $8.00 | $60,800 | 44,600 | Jun 7, 2019 |
| Gramm Jefferson | — | Award / Grant | 1,391 | — | — | 1,995 | May 29, 2019 |
| Westphal Susan | — | Award / Grant | 1,391 | — | — | 5,429 | May 29, 2019 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 1,391 | — | — | 72,666 | May 29, 2019 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 5,000 | $8.64 | $43,200 | 71,275 | Dec 3, 2018 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 9,329 | $8.68 | $80,976 | 51,060 | Nov 29, 2018 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 4,711 | $8.30 | $39,101 | 40,986 | Nov 28, 2018 |
| Slavutsky Inga A | Chief Financial Officer | Option Exercise | 219 | — | — | 357 | Jul 6, 2018 |
| Westphal Susan | — | Award / Grant | 626 | — | — | 4,038 | Mar 16, 2018 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 626 | — | — | 36,275 | Mar 16, 2018 |
| Gramm Jefferson | — | Award / Grant | 626 | — | — | 1,230 | Mar 16, 2018 |
| Westphal Susan | — | Award / Grant | 1,175 | — | — | 3,412 | Jan 2, 2018 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 1,269 | — | — | 35,649 | Jan 2, 2018 |
| Gramm Jefferson | — | Award / Grant | 604 | — | — | 604 | Jan 2, 2018 |
| CALDWELL DONALD R | — | Sale | 221,784 | $8.00 | $1,774,272 | — | Nov 16, 2017 |
| Graffy Mardel A | Chief Financial Officer | Tax Withholding | 130 | $7.61 | $989 | 284 | Nov 1, 2017 |
| Westphal Susan | — | Award / Grant | 1,106 | — | — | 2,237 | Sep 30, 2017 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 1,247 | — | — | 34,380 | Sep 30, 2017 |
| CALDWELL DONALD R | — | Award / Grant | 1,228 | — | — | 13,900 | Sep 30, 2017 |
| Aquilano Don N | — | Award / Grant | 1,914 | — | — | 26,287 | Sep 30, 2017 |
| Westphal Susan | — | Award / Grant | 964 | — | — | 1,131 | Jun 30, 2017 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 1,101 | — | — | 33,133 | Jun 30, 2017 |
| CALDWELL DONALD R | — | Award / Grant | 1,084 | — | — | 12,672 | Jun 30, 2017 |
| Aquilano Don N | — | Award / Grant | 1,689 | — | — | 24,373 | Jun 30, 2017 |
| Brog Timothy | President and CEO | Option Exercise | 15,000 | — | — | 42,759 | Jun 9, 2017 |
| Brog Timothy | President and CEO | Tax Withholding | 138,000 | $0.80 | $110,400 | 277,594 | Apr 6, 2017 |
| Spencer Raymond J | — | Award / Grant | 10,393 | — | — | 147,551 | Mar 31, 2017 |
| Westphal Susan | — | Award / Grant | 1,673 | — | — | 1,673 | Mar 31, 2017 |
| MIKOLAJCZYK MICHAEL E | — | Award / Grant | 11,720 | — | — | 320,327 | Mar 31, 2017 |