Rubicon Technology, Inc. (RBCN)

Latest Insider Confidence Score

2025Q4

50.0
Bearish

Company insider confidence (by quarter)

2007Q4 2025Q4

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Cross Atlantic Capital Partners, Inc. 10% Owner 4,717,851 Jan 3, 2014
Cross Atlantic Technology Fund II Lp 10% Owner 2,217,851 Mar 25, 2014
Xatf Management II Lp 10% Owner 2,217,851 Mar 25, 2014
Cross Atlantic Capital Partners II Inc 10% Owner 2,217,851 Mar 25, 2014
Co Investment 2000 Fund Lp 10% Owner 2,217,851 Mar 25, 2014

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Feb 22, 2023 Feb 24, 2023 Brog Timothy Director Sell 22.5 -52,624 -91.37% $79.5K
Aug 29, 2022 Eidinger John Director Neutral 52.5 - 0.00% -
Aug 29, 2022 Seirer Darren Clay Director Neutral 52.5 - 0.00% -
Aug 24, 2022 JANEL CORP 10% Owner Neutral 52.5 - 0.00% -
Aug 19, 2022 Aug 23, 2022 Gramm Jefferson Director Sell 17.5 -132,992 -50.31% $2.7M
Aug 19, 2022 Aug 22, 2022 Brog Timothy CEO Sell 17.5 -58,315 -50.31% $1.2M
Aug 19, 2022 Aug 22, 2022 MIKOLAJCZYK MICHAEL E Director Sell 20.0 -31,851 -50.31% $637K
Aug 19, 2022 Aug 22, 2022 Westphal Susan Director Sell 22.5 -4,472 -50.32% $89.4K
Jul 29, 2022 Aug 1, 2022 Gramm Jefferson Director Neutral 60.0 +1,010 0.38% -
Jul 29, 2022 Aug 1, 2022 MIKOLAJCZYK MICHAEL E Director Neutral 77.5 +1,010 1.62% -
Jul 29, 2022 Aug 1, 2022 Westphal Susan Director Neutral 90.0 +1,010 12.82% -
Jul 18, 2022 Jul 19, 2022 Brog Timothy CEO Sell 42.5 -6,346 -5.19% $101.9K
Jul 13, 2022 Jul 15, 2022 Brog Timothy CEO Sell 42.5 -6,346 -5.47% $100.5K
Dec 28, 2021 Dec 29, 2021 Brog Timothy CEO Neutral 52.5 - 0.00% -
Jun 23, 2021 Jun 28, 2021 MIKOLAJCZYK MICHAEL E Director Neutral 77.5 +1,250 2.05% -
Jun 23, 2021 Jun 28, 2021 Westphal Susan Director Neutral 90.0 +1,250 18.86% -
Jun 23, 2021 Jun 28, 2021 Gramm Jefferson Director Neutral 60.0 +1,250 0.48% -
Apr 6, 2021 Apr 7, 2021 Brog Timothy CEO Sell 95.0 +16,600 19.08% $161.6K
Mar 22, 2021 Lusardi Kevin Timothy CFO Neutral 52.5 - 0.00% -
Oct 19, 2020 Oct 20, 2020 Brog Timothy CEO Sell 46.3 -5,280 -5.72% $44.9K
Jul 15, 2020 Sep 15, 2020 Gramm Jefferson Director Neutral 60.0 +1,199 0.46% -
Jul 15, 2020 Sep 15, 2020 MIKOLAJCZYK MICHAEL E Director Neutral 77.5 +1,199 2.00% -
Jul 15, 2020 Sep 15, 2020 Westphal Susan Director Neutral 90.0 +1,199 22.09% -
Sep 14, 2020 Bandera Partners LLC 10% Owner Neutral 52.5 - 0.00% -
Nov 19, 2019 Rich Mathew Jason CFO Neutral 52.5 - 0.00% -
Sep 30, 2019 Oct 2, 2019 Brog Timothy CEO Sell 42.5 -21,000 -21.88% $190.9K
Jun 11, 2019 Jun 12, 2019 Brog Timothy CEO Buy 83.8 +2,051 4.56% $16.6K
Jun 10, 2019 Jun 10, 2019 MIKOLAJCZYK MICHAEL E Director Sell 22.5 -12,818 -17.64% $104.1K
Jun 6, 2019 Jun 10, 2019 Brog Timothy CEO Buy 95.0 +7,949 21.48% $63.6K
May 29, 2019 Jun 4, 2019 Gramm Jefferson Director Neutral 67.5 +1,391 0.54% -
May 29, 2019 Jun 3, 2019 Westphal Susan Director Neutral 90.0 +1,391 34.45% -
May 29, 2019 Jun 3, 2019 MIKOLAJCZYK MICHAEL E Director Neutral 77.5 +1,391 1.95% -
Dec 3, 2018 Dec 4, 2018 MIKOLAJCZYK MICHAEL E Director Neutral 90.0 +20,215 39.59% -
Nov 29, 2018 Nov 30, 2018 MIKOLAJCZYK MICHAEL E Director Neutral 90.0 +9,687 23.41% -
Nov 27, 2018 Nov 28, 2018 MIKOLAJCZYK MICHAEL E Director Neutral 90.0 +5,098 14.05% -
Jul 6, 2018 Jul 9, 2018 Slavutsky Inga A CFO Sell 47.5 -81 -22.69% $639.1
Jun 6, 2018 Slavutsky Inga A CFO Neutral 52.5 - 0.00% -
May 10, 2018 May 14, 2018 Westphal Susan Director Neutral 52.5 - 0.00% -
May 10, 2018 May 14, 2018 MIKOLAJCZYK MICHAEL E Director Neutral 52.5 - 0.00% -
May 10, 2018 May 14, 2018 Gramm Jefferson Director Neutral 52.5 - 0.00% -
Mar 16, 2018 Mar 19, 2018 Westphal Susan Director Neutral 90.0 +626 18.35% -
Mar 16, 2018 Mar 19, 2018 MIKOLAJCZYK MICHAEL E Director Neutral 77.5 +626 1.76% -
Mar 16, 2018 Mar 19, 2018 Gramm Jefferson Director Neutral 60.0 +626 0.24% -
Jan 3, 2018 Jan 4, 2018 Graffy Mardel A CFO Neutral 52.5 - 0.00% -
Jan 2, 2018 Jan 4, 2018 Westphal Susan Director Neutral 90.0 +1,175 52.53% -
Jan 2, 2018 Jan 4, 2018 MIKOLAJCZYK MICHAEL E Director Neutral 82.5 +1,269 3.69% -
Jan 2, 2018 Jan 4, 2018 Gramm Jefferson Director Neutral 60.0 +604 0.23% -
Jan 1, 2018 Jan 2, 2018 Brog Timothy CEO Neutral 52.5 - 0.00% -
Nov 16, 2017 Nov 20, 2017 CALDWELL DONALD R Director Sell 17.5 -221,784 -94.10% $1.8M
Nov 17, 2017 Gramm Jefferson Director Neutral 52.5 - 0.00% -
Nov 1, 2017 Nov 2, 2017 Graffy Mardel A CFO Sell 47.5 -130 -10.58% $989.3
Sep 30, 2017 Oct 3, 2017 Westphal Susan Director Neutral 90.0 +1,106 97.79% -
Sep 30, 2017 Oct 3, 2017 MIKOLAJCZYK MICHAEL E Director Neutral 82.5 +1,247 3.76% -
Sep 30, 2017 Oct 3, 2017 CALDWELL DONALD R Director Neutral 67.5 +1,228 0.52% -
Sep 30, 2017 Oct 3, 2017 Aquilano Don N Director Neutral 85.0 +1,914 7.85% -
Jun 30, 2017 Jul 5, 2017 Westphal Susan Director Neutral 90.0 +964 577.25% -
Jun 30, 2017 Jul 5, 2017 MIKOLAJCZYK MICHAEL E Director Neutral 82.5 +1,101 3.44% -
Jun 30, 2017 Jul 5, 2017 CALDWELL DONALD R Director Neutral 60.0 +1,084 0.46% -
Jun 30, 2017 Jul 5, 2017 Aquilano Don N Director Neutral 85.0 +1,689 7.45% -
Jun 9, 2017 Jun 13, 2017 Brog Timothy CEO Sell 42.5 -5,759 -13.47% $54.8K
May 12, 2017 May 15, 2017 Brog Timothy CEO Neutral 52.5 - 0.00% -
Apr 6, 2017 Apr 10, 2017 Brog Timothy CEO Sell 42.5 -138,000 -33.21% $110.4K
Mar 31, 2017 Apr 4, 2017 Spencer Raymond J Director Neutral 85.0 +10,393 7.58% -
Mar 31, 2017 Apr 4, 2017 Westphal Susan Director Neutral 90.0 +1,673 100.00% -
Mar 31, 2017 Apr 4, 2017 MIKOLAJCZYK MICHAEL E Director Neutral 82.5 +11,720 3.80% -
Mar 31, 2017 Apr 4, 2017 CALDWELL DONALD R Director Neutral 60.0 +10,831 0.47% -
Mar 31, 2017 Apr 4, 2017 Brog Timothy CEO Neutral 85.0 +9,020 8.46% -
Mar 31, 2017 Apr 4, 2017 Aquilano Don N Director Neutral 85.0 +17,991 8.61% -
Mar 27, 2017 Westphal Susan Director Neutral 52.5 - 0.00% -
Mar 15, 2017 Mar 17, 2017 Brog Timothy CEO Neutral 52.5 - 0.00% -
Oct 1, 2016 Mar 3, 2017 Aquilano Don N Director Sell 15.0 -46,634 -18.25% $706.1M
Jul 1, 2016 Jan 12, 2017 Spencer Raymond J Director Neutral 27.5 -2,412 -1.73% -
Dec 31, 2016 Jan 4, 2017 Tamim Hany COO Sell 27.5 -9,333 -20.44% $5.6K
Nov 1, 2016 Nov 3, 2016 Tamim Hany COO Sell 27.5 -4,334 -26.00% $2.6K
Nov 1, 2016 Nov 3, 2016 Graffy Mardel A CFO Sell 27.5 -1,510 -15.61% $906
Oct 1, 2016 Oct 13, 2016 Aquilano Don N Director Neutral 27.5 -46,634 -18.25% -
Oct 1, 2016 Oct 4, 2016 Spencer Raymond J Director Neutral 27.5 -8,772 -5.91% -
Oct 1, 2016 Oct 4, 2016 MIKOLAJCZYK MICHAEL E Director Neutral 27.5 -8,772 -2.76% -
Oct 1, 2016 Oct 4, 2016 Aquilano Don N Director Neutral 27.5 -42,248 -16.54% -
Jul 1, 2016 Jul 6, 2016 Brog Timothy Director Neutral 77.5 +2,022 1.93% -
May 26, 2016 May 31, 2016 Brog Timothy Director Neutral 90.0 +104,552 100.00% -
May 31, 2016 Brog Timothy Director Neutral 52.5 - 0.00% -
Dec 1, 2015 May 17, 2016 Graffy Mardel A CFO Neutral 52.5 - 0.00% -
Jan 1, 2016 Jan 5, 2016 Aquilano Don N Director Neutral 90.0 +200,657 365.96% -
Jan 1, 2016 Jan 5, 2016 MIKOLAJCZYK MICHAEL E Director Neutral 90.0 +109,210 52.46% -
Jan 1, 2016 Jan 5, 2016 Spencer Raymond J Director Neutral 90.0 +108,114 268.75% -
Jan 1, 2016 Jan 5, 2016 CALDWELL DONALD R Director Neutral 82.5 +69,517 3.09% -
Dec 30, 2015 Jan 4, 2016 MIKOLAJCZYK MICHAEL E Director Buy 95.0 +80,000 62.42% $95.6K
Dec 1, 2015 Dec 2, 2015 Weissman William F CEO Neutral 52.5 - 0.00% -
Dec 1, 2015 Dec 2, 2015 Graffy Mardel A CFO Neutral 52.5 - 0.00% -
Nov 1, 2015 Nov 3, 2015 Graffy Mardel A CFO Sell 27.5 -1,510 -21.45% $1.7K
Oct 31, 2015 Nov 3, 2015 Tamim Hany COO Neutral 52.5 - 0.00% -
Oct 20, 2015 Tamim Hany COO Neutral 52.5 - 0.00% -
Jan 1, 2015 Jan 5, 2015 MIKOLAJCZYK MICHAEL E Director Neutral 90.0 +13,621 11.89% -
Jan 1, 2015 Jan 5, 2015 CALDWELL DONALD R Director Neutral 60.0 +8,670 0.39% -
Jan 1, 2015 Jan 5, 2015 Spencer Raymond J Director Neutral 90.0 +13,484 50.42% -
Jan 1, 2015 Jan 5, 2015 Aquilano Don N Director Neutral 90.0 +25,027 83.97% -
Dec 31, 2014 Jan 5, 2015 Weissman William F CEO Sell 27.5 -1,903 -11.86% $8.3K
Nov 1, 2014 Nov 4, 2014 Graffy Mardel A VP - Financial Operations Sell 27.5 -364 -11.18% $1.6K
Sep 19, 2014 Sep 23, 2014 Graffy Mardel A VP - Financial Operations Neutral 52.5 - 0.00% -