SEPN — Septerna, Inc.

Materials · Pharmaceutical Preparations · Nasdaq

CIK 0001984086 · FYE 1231 · All Form 4 filings on EDGAR ↗

1Insiders filing

3Transactions

+$9kReported buys

−$126kReported sells

0Cluster events

Window in data: 2026-09-01 → 2026-09-01 · Data as of 2026-09-04

Insiders

Insider	Role	Txns	Reported value
Long Daniel D.	SVP, Drug Discovery	3	$135k

Transaction history

Filing date	Trade date	Ticker	Insider	Type	Shares	Price	Value	Cluster
2026-09-03	2026-09-01	SEPN	Long Daniel D. SVP, Drug Discovery 10b5-1	M routine	3,333	$2.76	+$9k	—
2026-09-03	2026-09-01	SEPN	Long Daniel D. SVP, Drug Discovery 10b5-1	S	3,333	$37.83	−$126k	—
2026-09-03	2026-09-01	SEPN	Long Daniel D. SVP, Drug Discovery 10b5-1	M routine	3,333	—	—	—

Known data limitations

Form 4 lag: insiders have 2 business days to file after a trade (weekends and holidays extend this), and this site re-ingests once daily — a transaction can appear here roughly three business days after it happened.

13F lag: quarterly 13F-HR holdings cover the prior quarter-end and are due 45 days after it — every institutional position shown here is at least 45 days old by construction, often more.

CUSIP→ticker gaps: 13F positions are reported by CUSIP; some holdings cannot be matched to a current ticker (delistings, corporate actions, thin metadata) and appear without one or are omitted from ticker-level views.

EDGAR timing variability: institutions file at different hours and days within their windows; amended filings (4/A, 13F-HR/A) can restate earlier periods, so historical aggregates may change between batches.

Insider Atlas is a descriptive research site, not investment advice — see the methodology for the full provenance chain.