Insider trading · Q3 2026 · CIK 1984086

Septerna, Inc. (SEPN) insider trading.

Name: Septerna, Inc. insider transactions, Q3 2026
Creator: U.S. Securities and Exchange Commission

In Q3 2026, insiders at Septerna, Inc. reported 18 non-derivative transactions on 9 Forms 3, 4 and 5: 0 open-market purchases and 11 sales worth $72.4M.

Transactions: 18
Purchases (P): 0
Sales (S): 11
Net shares, P minus S: -1,679,200
Insiders: 4
Last filed: 2026-09-03

Insiders

Insider	Relationship	Transactions	Sales
Long Daniel D.	Officer · SVP, Drug Discovery	9	5
Bhatt Elizabeth	Officer · President and COO	5	2
Third Rock Ventures GP VI, L.P. / Third Rock Ventures V, L.P. / Third Rock Ventures GP V, LP / TRV GP V, LLC / Third Rock Ventures VI, L.P. / TRV GP VI, LLC	TenPercentOwner	2	2
Shah Rajeev M. / RA Capital Nexus Fund III, L.P. / RA Capital Healthcare Fund LP / RA CAPITAL MANAGEMENT, L.P. / Kolchinsky Peter	Director, TenPercentOwner	2	2

Transactions

18 non-derivative rows, newest transaction first. Shares and prices as filed.
Date	Insider	Code	Shares	Price	Owned after	Filing
2026-09-01	Long Daniel D.	M (A)	3,333	$2.76	99,745	Form 4
2026-09-01	Long Daniel D.	S (D)	3,333	$37.83	96,412	Form 4
2026-08-12	Third Rock Ventures GP VI, L.P. / Third Rock Ventures V, L.P. / Third Rock Ventures GP V, LP / TRV GP V, LLC / Third Rock Ventures VI, L.P. / TRV GP VI, LLC	S (A)	141	$51.08	6,068,391	Form 4
2026-08-12	Third Rock Ventures GP VI, L.P. / Third Rock Ventures V, L.P. / Third Rock Ventures GP V, LP / TRV GP V, LLC / Third Rock Ventures VI, L.P. / TRV GP VI, LLC	S (A)	147,059	$50.27	6,068,532	Form 4
2026-08-12	Shah Rajeev M. / RA Capital Nexus Fund III, L.P. / RA Capital Healthcare Fund LP / RA CAPITAL MANAGEMENT, L.P. / Kolchinsky Peter	S (D)	746,500	$42.5	4,777,415	Form 4
2026-08-12	Shah Rajeev M. / RA Capital Nexus Fund III, L.P. / RA Capital Healthcare Fund LP / RA CAPITAL MANAGEMENT, L.P. / Kolchinsky Peter	S (D)	746,500	$42.5	725,443	Form 4
2026-08-11	Bhatt Elizabeth	M (A)	18,681	$6.81	192,890	Form 4
2026-08-11	Bhatt Elizabeth	S (D)	25,000	$44	174,209	Form 4
2026-08-11	Bhatt Elizabeth	M (A)	6,319	$2.76	199,209	Form 4
2026-08-03	Long Daniel D.	S (D)	2,334	$34.68	96,412	Form 4
2026-08-03	Long Daniel D.	S (D)	1,000	$33.98	98,746	Form 4
2026-08-03	Long Daniel D.	M (A)	1,816	$2.76	98,228	Form 4
2026-08-03	Long Daniel D.	M (A)	1,518	$2.76	99,746	Form 4
2026-07-15	Bhatt Elizabeth	S (D)	4,000	$33.99	174,209	Form 4
2026-07-15	Bhatt Elizabeth	M (A)	4,000	$6.81	178,209	Form 4
2026-07-01	Long Daniel D.	S (D)	1,233	$34.81	96,412	Form 4
2026-07-01	Long Daniel D.	M (A)	3,333	$2.76	99,745	Form 4
2026-07-01	Long Daniel D.	S (D)	2,100	$34.1	97,645	Form 4

Transaction codes in this quarter

S: 11 M: 7

Get SEPN insider transactions through the API

Request with your API key

curl "https://sec-api.dev/api/v1/insider-transactions?period=2026q3&cik=1984086&limit=100" \
  -H "Authorization: Bearer $SEC_API_KEY"

Insider trading API guide · SEPN company page · Septerna, Inc. on SEC.gov

Questions

Are insiders buying or selling Septerna, Inc. (SEPN)?

In Q3 2026, insiders at Septerna, Inc. reported 18 non-derivative transactions on 9 Forms 3, 4 and 5: 0 open-market purchases and 11 sales worth $72.4M. Grants, tax withholding and option exercises are counted as transactions but are not purchases or sales.

Where do these Septerna, Inc. insider trades come from?

From the SEC Insider Transactions Data Sets for Q3 2026, which republish the Forms 3, 4 and 5 filed on EDGAR. Each row links to its filing on SEC.gov.

Source: SEC Insider Transactions Data Sets, Q3 2026, retrieved 2026-10-27. Footnotes, derivative holdings and amendments are in the linked filings. Not investment advice.

Plain-text version for agents and LLMs: /insider-trading/sepn.md

Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.