Latest filings (excl ownership)
15-15D
Suspension of duty to report
30 Mar 23
10-K
2022 FY
Annual report
30 Mar 23
EFFECT
Notice of effectiveness
23 Mar 23
POS AM
Prospectus update (post-effective amendment)
20 Mar 23
EFFECT
Notice of effectiveness
15 Mar 23
POS AM
Prospectus update (post-effective amendment)
10 Mar 23
S-8 POS
Registration of securities for employees (post-effective amendment)
10 Mar 23
S-8 POS
Registration of securities for employees (post-effective amendment)
10 Mar 23
S-8 POS
Registration of securities for employees (post-effective amendment)
10 Mar 23
8-K
Departure of Directors or Certain Officers
3 Mar 23
8-K
Departure of Directors or Certain Officers
24 Feb 23
25
Voluntary exchange delisting
23 Dec 22
8-K
Submission of Matters to a Vote of Security Holders
23 Dec 22
8-K
Rubicon Technology Announces Voluntary Delisting from Nasdaq
13 Dec 22
8-K
Departure of Directors or Certain Officers
13 Dec 22
DEF 14A
Definitive proxy
21 Nov 22
10-Q
2022 Q3
Quarterly report
10 Nov 22
8-K
Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard
20 Oct 22
8-K/A
Completion of Acquisition or Disposition of Assets
20 Sep 22
8-K
Completion of Acquisition or Disposition of Assets
19 Sep 22
8-K
Departure of Directors or Certain Officers
22 Aug 22
8-K
Entry into a Material Definitive Agreement
19 Aug 22
SC TO-T/A
Third party tender offer statement (amended)
18 Aug 22
SC TO-T/A
Third party tender offer statement (amended)
15 Aug 22
8-K
Rubicon Technology, Inc. Sets Record Date for its
12 Aug 22
10-Q
2022 Q2
Quarterly report
11 Aug 22
SC 14D9
Tender offer solicitation
25 Jul 22
SC TO-T
Third party tender offer statement
13 Jul 22
SC TO-C
Information about tender offer
13 Jul 22
PX14A6G
Letter to shareholders
11 Jul 22
8-A12B/A
Registration of securities on exchange (amended)
11 Jul 22
DEFA14A
Additional proxy soliciting materials
5 Jul 22
8-K
Tender and Voting Agreement
5 Jul 22
SC TO-C
Information about tender offer
5 Jul 22
DFAN14A
Additional proxy materials by non-management
13 May 22
10-Q
2022 Q1
Quarterly report
12 May 22
10-K/A
2021 FY
Annual report (amended)
28 Apr 22
DFAN14A
Additional proxy materials by non-management
27 Apr 22
10-K
2021 FY
Annual report
25 Mar 22
UPLOAD
Letter from SEC
1 Mar 22
Latest ownership filings
4
Timothy Brog
24 Feb 23
3
John Eidinger
29 Aug 22
3
Darren Clay Seirer
29 Aug 22
SC 13D/A
Aldebaran Capital, LLC
24 Aug 22
3
Dominique Schulte
24 Aug 22
SC 13D/A
JANEL CORP
24 Aug 22
4
Jefferson Gramm
23 Aug 22
SC 13D/A
Bandera Partners LLC
23 Aug 22
SC 13D/A
Sententia Capital Management, LLC
22 Aug 22
4
Timothy Brog
22 Aug 22
4
MICHAEL E MIKOLAJCZYK
22 Aug 22
4
Susan Westphal
22 Aug 22
4
Jefferson Gramm
1 Aug 22
4
MICHAEL E MIKOLAJCZYK
1 Aug 22
4
Susan Westphal
1 Aug 22
4
Timothy Brog
19 Jul 22
4
Timothy Brog
15 Jul 22
SC 13D/A
Aldebaran Capital, LLC
12 Jul 22
SC 13D/A
Bandera Partners LLC
8 Jul 22
SC 13D/A
JANEL CORP
5 Jul 22
SC 13D
JANEL CORP
5 Jul 22
SC 13G/A
POPLAR POINT CAPITAL MANAGEMENT LLC
7 Feb 22
4
Timothy Brog
29 Dec 21
4
MICHAEL E MIKOLAJCZYK
28 Jun 21
4
Susan Westphal
28 Jun 21
4
Jefferson Gramm
28 Jun 21
4
Timothy Brog
7 Apr 21
3
Kevin Timothy Lusardi
22 Mar 21
SC 13G
POPLAR POINT CAPITAL MANAGEMENT LLC
10 Feb 21
4
Timothy Brog
20 Oct 20
4
Jefferson Gramm
15 Sep 20
4
MICHAEL E MIKOLAJCZYK
15 Sep 20
4
Susan Westphal
15 Sep 20
3
Gregory Bylinsky
14 Sep 20
SC 13D/A
Bandera Partners LLC
14 Sep 20
SC 13G/A
Beneficial ownership report (amended)
14 Feb 20
3
Mathew Jason Rich
19 Nov 19
4
Timothy Brog
2 Oct 19
4
Timothy Brog
12 Jun 19
4
MICHAEL E MIKOLAJCZYK
10 Jun 19