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See how Context works →On the price, the facts of the public record■Insider buy□Insider sell◇Significant stake declared (13D)●Results filed
With an account, also○dividends▲splits◌next earningswith an account
End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.
Latest on record
The most recent facts, as filed.
Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.
- Oct 1, 2026Notice of sale · Form 144DANIEL LONG · Officer · $391.3KOpen the filing ↗
- Oct 1, 2026Notice of sale · Form 144SAMIRA SHAIKHLY · Officer · $492.7KOpen the filing ↗
- Sep 1, 2026Reported sale · Form 4Daniel D. Long, SVP, Drug Discovery · $126.1KOpen the filing ↗
In numbers
What this profile holds, counted.
Closes · 1 year250
SEC filings on record15615 flagged findings
Reported transactions (Form 4)80since Aug 18, 2025 · and 40 other holdings
Corporate events (8-K)4since Jan 6, 2025
What the record says
Description, identity and filings, each with its source.
Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.
Regulatory history
Topics detected in its SEC reports, with the original excerpt.
Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.
- 2026-05-11share offering or dilution eventrecentOpen filing ↗“…of convertible promissory notes and convertible preferred stock, sales of our common stock, and collaboration arrangements with…”
+1 more passage from the same document
- “…reserved for issuance under 2024 Employee Stock Purchase Plan 620,613 251,211 11,886,750 8,887,335 At-the-Market Equity Program In…”
- 2026-05-11export control restrictionsrecentOpen filing ↗“…China and the United States have each imposed tariffs indicating the potential for further trade barriers, including the U.S.…”
+1 more passage from the same document
- “…if approved, the competitive position of our product candidates, and import or export of raw materials and finished product candidate…”
- 2026-05-11capital return (buybacks/dividends)recentOpen filing ↗“…31, 2025; no shares issued and outstanding as of March 31, 2026 and December 31, 2025 — — Common stock, $ 0.001 par value per…”
+1 more passage from the same document
- “…stock-based compensation expense related to ESPP was $ 1.4 million, which is expected to be recognized over a weighted…”
- 2026-05-11Department of Justice inquiryrecentOpen filing ↗“…and volume of consumer information it holds, the size and complexity of its business and the cost of available tools to…”
- 2026-03-10share offering or dilution eventrecentOpen filing ↗“…exercise; • in the case of warrants to purchase debt securities, the principal amount of debt securities purchasable upon exercise…”
+1 more passage from the same document
- “…warrants; • any provisions for changes to or adjustments in the exercise price or number of securities issuable upon exercise of…”
- 2026-03-10capital return (buybacks/dividends)recentOpen filing ↗“…of our certificate of incorporation and bylaws are summaries and are qualified by reference to our certificate of…”
+1 more passage from the same document
- “…before deciding to purchase shares of our common stock. Nasdaq Global Market Symbol “SEPN” All information in this prospectus…”
Original excerpts from SEC filings, untranslated. Not advice and not a prediction.
The 25 most recent filings (of 156)
Every SEC filing, newest first, with what it is. Below, each type with its own explanation.
Notice of proposed sale · 2 Form 144 filingsshow all 2hide
- Oct 1, 26Form 144 ↗Notice of proposed sale
- Oct 1, 26Form 144 ↗Notice of proposed sale
- Sep 10, 26Form 4 ↗Insider transaction
- Sep 3, 26Form 3 ↗Insider transaction
- Sep 3, 26Form 4 ↗Insider transaction
- Aug 25, 268-K ↗Current report · Communication to the market · Other events
- Aug 14, 26SCHEDULE 13D/A ↗Stake with intent to influence · RA Capital Management, L.P. · 11.8% · event on Aug 12, 26 · amendment
- Aug 14, 26SCHEDULE 13G/A ↗Passive stake · DRIEHAUS CAPITAL MANAGEMENT LLC · 9.8% · event on Jun 30, 26 · amendment
- Aug 13, 26Form 4 ↗Insider transaction
Notice of proposed sale · 4 Form 144 filingsshow all 4hide
- Aug 12, 26Form 144 ↗Notice of proposed sale
- Aug 12, 26Form 144 ↗Notice of proposed sale
- Aug 12, 26Form 144 ↗Notice of proposed sale
- Aug 11, 26Form 144 ↗Notice of proposed sale
- Aug 10, 2610-Q ↗Quarterly report
- Aug 10, 268-K ↗Current report · Results
- Jul 15, 26Form 144 ↗Notice of proposed sale
156 filings on record, the oldest from Sep 5, 24.
Listing the 25 most recent filings of the 156 on record.
13
- Sep 29, 25A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Aug 4, 25A senior executive left or was appointed8-K 5.02 ↗
- May 14, 25Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Jan 6, 25A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.
Schedule 13D: stake and stated purpose
Filed by holders above 5% of a share class who cannot use the short form. It includes the investor's stated purpose: read it before assuming they seek influence.
- RA Capital Management, L.P.11.8%Aug 12, 26SCHEDULE 13D/A ↗4 co-filers on this document — the figure is the largest single stake, not their sum.
Schedule 13G: short-form filing
The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.
- Third Rock Ventures V, L.P.14.0%Mar 31, 25SCHEDULE 13G/A ↗6 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
- DRIEHAUS CAPITAL MANAGEMENT LLC9.8%Jun 30, 26SCHEDULE 13G/A ↗3 earlier filings
- BVF PARTNERS L P/IL3.8%Dec 31, 25SCHEDULE 13G/A ↗10 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.
Sale intention announced
On Oct 1, DANIEL LONG filed notice of intent to sell up to $391K. That is about 0.02% of shares outstanding. It is filed under a scheduled plan (10b5-1), arranged in advance.
A notice is not a sale: it may not go ahead, may happen in part, or at a different price.
No sale of theirs is on record yet in Form 4; the 90-day window is still open.
View notice (Form 144) ↗+9 more recent notices · 4 with a later sale
- Sep 1, 26Sell$126KDaniel D. LongSVP, Drug Discovery↗
- Aug 12, 26Sell$7.4MThird Rock Ventures V, L.P.↗
- Aug 12, 26Sell$7KThird Rock Ventures V, L.P.↗
- Aug 12, 26Sell$31.7MRA CAPITAL MANAGEMENT, L.P.↗
- Aug 12, 26Sell$31.7MRA CAPITAL MANAGEMENT, L.P.↗
- Aug 11, 26Sell$1.1MElizabeth BhattPresident and COO↗
- Aug 3, 26Sell$34KDaniel D. LongSVP, Drug Discovery↗
- Aug 3, 26Sell$81KDaniel D. LongSVP, Drug Discovery↗
- Jul 15, 26Sell$136KElizabeth BhattPresident and COO↗
- Jul 1, 26Sell$72KDaniel D. LongSVP, Drug Discovery↗
- Jul 1, 26Sell$43KDaniel D. LongSVP, Drug Discovery↗
- Jun 29, 26Sell$77KSamira ShaikhlyChief People Officer↗
There are 10 more transactions in this stretch.
Stock compensation, tax and giftsshow the 18 other transactionshide
Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.
- Sep 1, 26Compensation$9KDaniel D. LongSVP, Drug Discovery↗
- Aug 11, 26Compensation$127KElizabeth BhattPresident and COO↗
- Aug 11, 26Compensation$17KElizabeth BhattPresident and COO↗
- Aug 3, 26Compensation$5KDaniel D. LongSVP, Drug Discovery↗
- Aug 3, 26Compensation$4KDaniel D. LongSVP, Drug Discovery↗
- Jul 15, 26Compensation$27KElizabeth BhattPresident and COO↗
- Jul 1, 26Compensation$9KDaniel D. LongSVP, Drug Discovery↗
- Jun 29, 26Compensation$15KSamira ShaikhlyChief People Officer↗
- Jun 22, 26Compensation$29KDaniel D. LongSVP, Drug Discovery↗
- Jun 22, 26Compensation$52KDaniel D. LongSVP, Drug Discovery↗
- Jun 12, 26Compensation$73KSamira ShaikhlyChief People Officer↗
- Jun 1, 26Compensation$7KSamira ShaikhlyChief People Officer↗
- Jun 1, 26Compensation$3KSamira ShaikhlyChief People Officer↗
- Jun 1, 26Compensation$2KSamira ShaikhlyChief People Officer↗
- May 26, 26Compensation$80KSamira ShaikhlyChief People Officer↗
- Apr 15, 26Compensation$27KElizabeth BhattPresident and COO↗
- Mar 2, 26Compensation$83KSamira ShaikhlyChief People Officer↗
- Mar 2, 26Compensation$32KSamira ShaikhlyChief People Officer↗
The full record holds 75 transactions and goes back to Oct 24, 24.
Its sector and its market
Septerna, Inc. among Health Care companies
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- 250 clean closes in the period.
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- 156 documents on file, from Sep 5, 2024 to Oct 1, 2026.
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- Generated on Oct 19, 2026; refreshed through the day.
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