Syndax Pharmaceuticals Inc SEC filings SNDX
Syndax Pharmaceuticals Inc has 657 filings in SEC EDGAR's recent list, going back to Apr 6, 2007. Its latest annual report, Form ARS, was filed on Apr 30, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 2, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 2, 2026 (results of operations, officer or director change). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 2, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Nov 2, 2026 | Nov 2, 2026 |
| 10-Q | Quarterly report | Aug 4, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 4, 2026 | Aug 4, 2026 |
| 8-K |
Current report
Other events
|
Jul 14, 2026 | Jul 14, 2026 |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Jun 10, 2026 | Jun 10, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 10, 2026 | Jun 10, 2026 |
| DEFA14A | Additional proxy material | Jun 4, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale, Other events
|
Jun 4, 2026 | Jun 3, 2026 |
| ARS | Annual report to shareholders | Apr 30, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 30, 2026 | — |
| DEF 14A | Proxy statement | Apr 30, 2026 | Apr 30, 2026 |
| 10-Q | Quarterly report | Apr 30, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
Apr 30, 2026 | Apr 30, 2026 |
| S-8 | Employee stock plan registration | Feb 26, 2026 | — |
| 10-K | Annual report | Feb 26, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 26, 2026 | Feb 26, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 12, 2026 | Jan 12, 2026 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Dec 19, 2025 | Dec 18, 2025 |
| 10-Q | Quarterly report | Nov 3, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 3, 2025 | Nov 3, 2025 |
| 8-K |
Current report
Other events
|
Oct 24, 2025 | Oct 24, 2025 |
| 10-Q | Quarterly report | Aug 4, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 4, 2025 | Aug 4, 2025 |
| 8-K |
Current report
Officer or director change
|
Jun 26, 2025 | Jun 24, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
May 16, 2025 | May 12, 2025 |
| 10-Q | Quarterly report | May 5, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
May 5, 2025 | May 5, 2025 |
| ARS | Annual report to shareholders | Apr 1, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 1, 2025 | — |
| DEF 14A | Proxy statement | Apr 1, 2025 | Apr 1, 2025 |
| S-8 | Employee stock plan registration | Mar 4, 2025 | — |
| 10-K | Annual report | Mar 3, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations, Other events
|
Mar 3, 2025 | Mar 3, 2025 |
| 8-K |
Current report
Officer or director change
|
Dec 20, 2024 | Dec 20, 2024 |
| 8-K |
Current report
Other events
|
Nov 18, 2024 | Nov 15, 2024 |
| 8-K |
Current report
Other events
|
Nov 12, 2024 | Nov 12, 2024 |
| 10-Q | Quarterly report | Nov 5, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2024 | Nov 5, 2024 |
| 8-K |
Current report
Material agreement
|
Nov 4, 2024 | Nov 4, 2024 |
| 10-Q | Quarterly report | Aug 1, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 1, 2024 | Aug 1, 2024 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Regulation FD disclosure
|
May 15, 2024 | May 14, 2024 |
| 10-Q | Quarterly report | May 8, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 8, 2024 | May 8, 2024 |
| ARS | Annual report to shareholders | Apr 2, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Apr 2, 2024 | — |
| DEF 14A | Proxy statement | Apr 2, 2024 | Mar 27, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 18, 2024 | Mar 15, 2024 |
| S-3ASR | Automatic shelf registration | Feb 27, 2024 | — |
| S-8 | Employee stock plan registration | Feb 27, 2024 | — |
| 10-K | Annual report | Feb 27, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 27, 2024 | Feb 27, 2024 |
| 8-K |
Current report
Other events
|
Dec 20, 2023 | Dec 19, 2023 |
| 8-K |
Current report
Material agreement
|
Dec 15, 2023 | Dec 14, 2023 |
| 424B5 | Prospectus supplement | Dec 15, 2023 | — |
| 424B5 | Prospectus supplement | Dec 14, 2023 | — |
| 8-K |
Current report
Other events
|
Dec 12, 2023 | Dec 10, 2023 |
| UPLOAD | Letter from the SEC | Dec 7, 2023 | — |
| CORRESP | Letter to the SEC | Nov 28, 2023 | — |
| UPLOAD | Letter from the SEC | Nov 13, 2023 | — |
| 10-Q | Quarterly report | Nov 2, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 2, 2023 | Nov 2, 2023 |
| 8-K |
Current report
Other events
|
Oct 2, 2023 | Oct 2, 2023 |
| 10-Q | Quarterly report | Aug 3, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2023 | Aug 3, 2023 |
| 8-K |
Current report
Other events
|
Jul 24, 2023 | Jul 24, 2023 |
| 8-K |
Current report
Agreement ended, Other events
|
May 26, 2023 | May 26, 2023 |
| 424B5 | Prospectus supplement | May 26, 2023 | — |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change, Shareholder vote results
|
May 18, 2023 | May 17, 2023 |
| 10-Q | Quarterly report | May 8, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations, Officer or director change
|
May 8, 2023 | May 5, 2023 |
| DEFA14A | Additional proxy material | Apr 18, 2023 | — |
| ARS | Annual report to shareholders | Apr 7, 2023 | Dec 31, 2022 |
| DEFA14A | Additional proxy material | Apr 7, 2023 | — |
| DEF 14A | Proxy statement | Apr 7, 2023 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 30, 2023 | Mar 29, 2023 |
| PRE 14A | Preliminary proxy statement | Mar 28, 2023 | — |
| S-8 | Employee stock plan registration | Feb 28, 2023 | — |
| 10-K | Annual report | Feb 28, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 28, 2023 | Feb 28, 2023 |
| 8-K |
Current report
Officer or director change
|
Feb 8, 2023 | Feb 2, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Dec 14, 2022 | Dec 14, 2022 |
| 8-K |
Current report
Material agreement
|
Dec 7, 2022 | Dec 6, 2022 |
| 424B5 | Prospectus supplement | Dec 7, 2022 | — |
| 424B5 | Prospectus supplement | Dec 6, 2022 | — |
| 8-K |
Current report
Officer or director change
|
Dec 5, 2022 | Dec 1, 2022 |
| 10-Q | Quarterly report | Nov 3, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 3, 2022 | Nov 3, 2022 |
| 8-K |
Current report
Agreement ended, Regulation FD disclosure
|
Sep 23, 2022 | Sep 19, 2022 |
| 10-Q | Quarterly report | Aug 8, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2022 | Aug 8, 2022 |
| 8-K |
Current report
Officer or director change
|
Jun 13, 2022 | Jun 8, 2022 |
| 8-K |
Current report
Shareholder vote results
|
May 11, 2022 | May 11, 2022 |
| 8-K |
Current report
Results of operations
|
May 9, 2022 | May 9, 2022 |
| 10-Q | Quarterly report | May 9, 2022 | Mar 31, 2022 |
| DEFA14A | Additional proxy material | Mar 30, 2022 | — |
| DEF 14A | Proxy statement | Mar 29, 2022 | May 11, 2022 |
| S-8 | Employee stock plan registration | Mar 1, 2022 | — |
| 10-K | Annual report | Mar 1, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations, Officer or director change, Regulation FD disclosure
|
Mar 1, 2022 | Mar 1, 2022 |
| 8-K |
Current report
Officer or director change
|
Feb 24, 2022 | Feb 22, 2022 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Feb 3, 2022 | Feb 2, 2022 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 23, 2021 | Dec 22, 2021 |
| 8-K |
Current report
Material agreement
|
Dec 17, 2021 | Dec 15, 2021 |
| 424B5 | Prospectus supplement | Dec 17, 2021 | — |
| 424B5 | Prospectus supplement | Dec 16, 2021 | — |
| 8-K |
Current report
Other events
|
Dec 13, 2021 | Dec 11, 2021 |
| 8-K |
Current report
Other events
|
Dec 9, 2021 | Dec 9, 2021 |
| 424B5 | Prospectus supplement | Dec 9, 2021 | — |
| 10-Q | Quarterly report | Nov 15, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 15, 2021 | Nov 15, 2021 |
| 8-K |
Current report
Officer or director change
|
Oct 4, 2021 | Oct 4, 2021 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Sep 27, 2021 | Sep 24, 2021 |
| 8-K |
Current report
Officer or director change
|
Sep 15, 2021 | Sep 15, 2021 |
| 10-Q | Quarterly report | Aug 9, 2021 | Jun 30, 2021 |
| S-8 | Employee stock plan registration | Aug 9, 2021 | — |
| 8-K |
Current report
Results of operations
|
Aug 9, 2021 | Aug 9, 2021 |
| 8-K |
Current report
Shareholder vote results
|
May 13, 2021 | May 13, 2021 |
| 10-Q | Quarterly report | May 11, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
May 11, 2021 | May 11, 2021 |
| 10-K/A | Amended annual report | Apr 30, 2021 | Dec 31, 2020 |
| DEF 14A | Proxy statement | Apr 1, 2021 | May 13, 2021 |
| S-3ASR | Automatic shelf registration | Mar 24, 2021 | — |
| RW | Filing | Mar 24, 2021 | — |
| S-3 | Shelf registration | Mar 22, 2021 | — |
| 10-K | Annual report | Mar 12, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations
|
Mar 8, 2021 | Mar 8, 2021 |
| 8-K |
Current report
Officer or director change
|
Feb 5, 2021 | Feb 3, 2021 |
| 8-K |
Current report
Material agreement
|
Dec 9, 2020 | Dec 8, 2020 |
| 424B5 | Prospectus supplement | Dec 9, 2020 | — |
| 8-K |
Current report
Agreement ended, Other events
|
Dec 7, 2020 | Dec 7, 2020 |
| 424B5 | Prospectus supplement | Dec 7, 2020 | — |
| 10-Q | Quarterly report | Nov 5, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 2, 2020 | Nov 2, 2020 |
| 10-Q | Quarterly report | Aug 6, 2020 | Jun 30, 2020 |
| S-8 | Employee stock plan registration | Aug 6, 2020 | — |
| 8-K |
Current report
Results of operations
|
Aug 6, 2020 | Aug 6, 2020 |
| 8-K |
Current report
Officer or director change
|
Jul 7, 2020 | Jul 6, 2020 |
| 8-K |
Current report
Shareholder vote results
|
Jun 9, 2020 | Jun 9, 2020 |
| 10-Q | Quarterly report | May 7, 2020 | Mar 31, 2020 |
| 8-K |
Current report
Results of operations
|
May 7, 2020 | May 7, 2020 |
| 8-K |
Current report
Material agreement, Other events
|
May 4, 2020 | Apr 30, 2020 |
| 424B5 | Prospectus supplement | May 4, 2020 | — |
| 8-K |
Current report
Results of operations, Other events
|
Apr 30, 2020 | Apr 30, 2020 |
| 424B5 | Prospectus supplement | Apr 30, 2020 | — |
| DEF 14A | Proxy statement | Apr 29, 2020 | Jun 9, 2020 |
| 10-K | Annual report | Mar 5, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Results of operations
|
Mar 3, 2020 | Mar 3, 2020 |
| 8-K |
Current report
Officer or director change
|
Feb 20, 2020 | Feb 12, 2020 |
| 8-K |
Current report
Material agreement, New debt
|
Feb 10, 2020 | Feb 7, 2020 |
| 8-K |
Current report
Other events
|
Feb 4, 2020 | Jan 30, 2020 |
| 424B5 | Prospectus supplement | Feb 3, 2020 | — |
| 8-K |
Current report
Other events
|
Dec 10, 2019 | Dec 10, 2019 |
| 10-Q | Quarterly report | Nov 7, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2019 | Nov 7, 2019 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 7, 2019 | Oct 7, 2019 |
| EFFECT | Filing | Sep 10, 2019 | — |
| 424B5 | Prospectus supplement | Sep 10, 2019 | — |
| CORRESP | Letter to the SEC | Sep 6, 2019 | — |
| UPLOAD | Letter from the SEC | Sep 5, 2019 | — |
| S-3 | Shelf registration | Aug 30, 2019 | — |
| S-8 | Employee stock plan registration | Aug 7, 2019 | — |
| 10-Q | Quarterly report | Aug 7, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2019 | Aug 7, 2019 |
| 8-K |
Current report
Officer or director change
|
Jul 8, 2019 | Jul 4, 2019 |
| 8-K |
Current report
Shareholder vote results
|
Jun 11, 2019 | Jun 10, 2019 |
| 10-Q | Quarterly report | May 8, 2019 | Mar 31, 2019 |
| 8-K |
Current report
Results of operations
|
May 6, 2019 | May 6, 2019 |
| DEF 14A | Proxy statement | Apr 30, 2019 | Jun 10, 2019 |
| 424B5 | Prospectus supplement | Mar 29, 2019 | — |
| 8-K |
Current report
Other events
|
Mar 29, 2019 | Mar 26, 2019 |
| CT ORDER | Filing | Mar 28, 2019 | — |
| 424B5 | Prospectus supplement | Mar 28, 2019 | — |
| 10-K/A | Amended annual report | Mar 18, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Results of operations
|
Mar 7, 2019 | Mar 7, 2019 |
| 10-K | Annual report | Mar 7, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Officer or director change
|
Feb 12, 2019 | Feb 6, 2019 |
| CT ORDER | Filing | Dec 20, 2018 | — |
| CT ORDER | Filing | Nov 27, 2018 | — |
| 10-Q | Quarterly report | Nov 5, 2018 | Sep 30, 2018 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2018 | Nov 5, 2018 |
| 8-K |
Current report
Officer or director change, Other events
|
Sep 26, 2018 | Sep 24, 2018 |
| CT ORDER | Filing | Aug 29, 2018 | — |
| S-8 | Employee stock plan registration | Aug 8, 2018 | — |
| 10-Q | Quarterly report | Aug 8, 2018 | Jun 30, 2018 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2018 | Aug 7, 2018 |
| 8-K |
Current report
Unregistered share sale
|
Jun 20, 2018 | Jun 18, 2018 |
| CT ORDER | Filing | Jun 13, 2018 | — |
| 8-K |
Current report
Shareholder vote results
|
May 25, 2018 | May 23, 2018 |
| 10-Q | Quarterly report | May 9, 2018 | Mar 31, 2018 |
| 8-K |
Current report
Results of operations
|
May 8, 2018 | May 8, 2018 |
| DEFA14A | Additional proxy material | Apr 10, 2018 | — |
| DEF 14A | Proxy statement | Apr 10, 2018 | May 23, 2018 |
| CT ORDER | Filing | Apr 3, 2018 | — |
| 10-K | Annual report | Mar 8, 2018 | Dec 31, 2017 |
| 8-K |
Current report
Officer or director change
|
Mar 6, 2018 | Mar 1, 2018 |
| 8-K |
Current report
Results of operations
|
Mar 5, 2018 | Mar 5, 2018 |
| 10-Q | Quarterly report | Nov 8, 2017 | Sep 30, 2017 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2017 | Nov 7, 2017 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- SNDX (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- New York, NY
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1395937
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.