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OPPENHEIMER HOLDINGS INC — All Filings

949 total filings on record

Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.

Overview All Filings Financials Insiders
All 10-12B 10-K 10-K/A 10-Q 10-Q/A 11-K 144 3 3/A 4 4/A 40-APP 424B3 5 8-A12B 8-K 8-K/A ARS CORRESP DEF 14A DEFA14A DEL AM EFFECT NT 10-Q PRE 14A RW S-3 S-3/A S-4 S-4/A S-8 S-8 POS SC 13D SC 13G SC 13G/A SC TO-I SC TO-I/A UPLOAD
Form Description Accession Number Filed Period
DEF 14A DEF 14A 0001104659-26-027365 Mar 13, 2026 May 4, 2026
4 FORM 4 0001628280-26-013646 Mar 3, 2026 Feb 26, 2026
4 FORM 4 0001628280-26-013643 Mar 3, 2026 Mar 2, 2026
4 FORM 4 0001628280-26-013645 Mar 3, 2026 Feb 26, 2026
PRE 14A PRE 14A 0001104659-26-021942 Mar 2, 2026 May 4, 2026
4 FORM 4 0001628280-26-012634 Feb 27, 2026 Feb 26, 2026
4 FORM 4 0001628280-26-012626 Feb 27, 2026 Feb 26, 2026
4 FORM 4 0001628280-26-012632 Feb 27, 2026 Feb 26, 2026
4 FORM 4 0001628280-26-012628 Feb 27, 2026 Feb 26, 2026
4 FORM 4 0001628280-26-012630 Feb 27, 2026 Feb 26, 2026
ARS ARS 0001628280-26-012326 Feb 26, 2026 Dec 31, 2025
10-K 10-K 0001628280-26-012313 Feb 26, 2026 Dec 31, 2025
5 FORM 5 0001628280-26-006375 Feb 9, 2026 Dec 31, 2025
5 FORM 5 0001628280-26-006378 Feb 9, 2026 Dec 31, 2025
8-K 8-K 0001628280-26-004480 Feb 2, 2026
8-K 8-K 0001628280-26-004298 Jan 30, 2026
4 FORM 4 0001628280-26-004165 Jan 29, 2026 Jan 28, 2026
4 FORM 4 0001628280-26-004160 Jan 29, 2026 Sep 22, 2025
4 FORM 4 0001628280-26-004161 Jan 29, 2026 Jan 28, 2026
4 FORM 4 0001628280-26-004163 Jan 29, 2026 Jan 28, 2026
8-K 8-K 0001628280-25-056657 Dec 12, 2025 Dec 11, 2025
40-APP 40-APP 0001104659-25-118534 Dec 5, 2025
8-K 8-K 0001628280-25-048003 Nov 3, 2025
10-Q 10-Q 0001628280-25-047684 Oct 31, 2025 Sep 30, 2025
8-K 8-K 0001628280-25-047686 Oct 31, 2025
4 FORM 4 0001395774-25-000006 Aug 6, 2025 Aug 5, 2025
8-K 8-K 0000791963-25-000041 Aug 4, 2025
10-Q 10-Q 0000791963-25-000037 Aug 1, 2025 Jun 30, 2025
8-K 8-K 0000791963-25-000038 Aug 1, 2025
144 0001950047-25-004117 Jun 10, 2025
4 FORM 4 0001648181-25-000008 Jun 10, 2025 Jun 9, 2025
144 0001950047-25-004048 Jun 9, 2025
4 FORM 4 0001648181-25-000004 Jun 9, 2025 Jun 6, 2025
144 0001950047-25-003972 Jun 6, 2025
11-K 11-K 0000791963-25-000034 Jun 4, 2025 Dec 31, 2024
8-K 8-K 0000791963-25-000026 May 6, 2025 May 5, 2025
8-K 8-K 0000791963-25-000024 Apr 28, 2025
10-Q 10-Q 0000791963-25-000022 Apr 25, 2025 Mar 31, 2025
8-K 8-K 0000791963-25-000020 Apr 25, 2025
DEF 14A FORM DEF 14A 0001104659-25-023748 Mar 14, 2025 May 5, 2025
ARS ARS 0000791963-25-000015 Mar 5, 2025 Dec 31, 2024
10-K 10-K 0000791963-25-000010 Feb 27, 2025 Dec 31, 2024
8-K 8-K 0000791963-25-000008 Feb 27, 2025
5 FORM 5 0001041339-25-000005 Feb 7, 2025 Dec 31, 2024
5 FORM 5 0001594628-25-000004 Feb 7, 2025 Dec 31, 2024
8-K 8-K 0000791963-25-000005 Feb 3, 2025
4 FORM 4 0001215176-25-000002 Jan 31, 2025 Jan 30, 2025
4 FORM 4 0001775404-25-000002 Jan 31, 2025 Jan 30, 2025
4 FORM 4 0002014257-25-000002 Jan 31, 2025 Jan 30, 2025
4 FORM 4 0001741163-25-000002 Jan 31, 2025 Jan 30, 2025