Public ownership evidence

Septerna, Inc. Common Stock (SEPN) Ownership Disclosures

Read SEPN insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Separate the three disclosure sources

Step 1 of 3

Recent Form 4 activity

Septerna, Inc. Common Stock: source evidence dated 2026-10-10T12:08:28.848Z.

Available
2026-09-10
Trade date
2026-09-08
Reporting owners
Patni Rajiv
Code
A
Shares
275,000
Reported value
Not reported
What you should see

The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.

Step 2 of 3

Is this an insider transaction, 13F holding, or Congressional event?

Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.

SEC 0001193125-26-388033
What you should see

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Step 3 of 3

Read SEPN fundamentals

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Read SEPN fundamentals
What you should see

Keep reporting dates and units beside the answer, and inspect its original citations.

Recent Form 4 activity

See the complete recent form 4 activity

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2026-09-102026-09-08Patni RajivA275,000Not reported
2026-09-042026-09-01Long Daniel D.S3,333Not reported
2026-08-152026-08-12Kolchinsky Peter, RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Shah Rajeev M.S746,500Not reported
2026-08-152026-08-12Kolchinsky Peter, RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Shah Rajeev M.S746,500Not reported
2026-08-142026-08-11Bhatt ElizabethS25,000Not reported
2026-08-062026-08-03Long Daniel D.S2,334Not reported
2026-08-062026-08-03Long Daniel D.S1,000Not reported
2026-07-182026-07-15Bhatt ElizabethS4,000Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Cornerstone Financial Management LLC2026-06-302026-08-2952$1,741None
Cornerstone Financial Management LLC2026-03-312026-08-2952$1,250None
Cornerstone Financial Management LLC2025-12-312026-08-2952$1,450None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-06-302026-08-2613,300$445,417None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2510,866$363,902None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25363,902$10,866,000None
Kalehua Capital Management LLC2026-06-302026-08-20194,544$6,515,279None
Kalehua Capital Management LLC2026-06-302026-08-15194,544$6,515,279None
Aster Capital Management (DIFC) Ltd2026-06-302026-08-15102$3,416None
First Light Asset Management, LLC2026-06-302026-08-15963,260$32,259,577None
Catalio Capital Management, LP2026-06-302026-08-15536,152$17,955,730None
ADAR1 Capital Management, LLC2026-06-302026-08-15940,747$31,505,617None
Ameritas Advisory Services, LLC2026-06-302026-08-1518$603None
Rangeley Capital, LLC2026-06-302026-08-157,200$241,128None
DIADEMA PARTNERS LP2026-06-302026-08-1559,700$1,999,353Put
XTX Topco Ltd2026-06-302026-08-1554,489$1,824,837None
Aquatic Capital Management LLC2026-06-302026-08-1517,427$583,630None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15187,041$6,264,003None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15187,041$6,264,003None
SAMSARA BIOCAPITAL, LLC2026-06-302026-08-153,149,128$105,464,297None
Caption Management, LLC2026-06-302026-08-15200,000$6,698,000Put
Caption Management, LLC2026-06-302026-08-15440,000$14,735,600Call
Caption Management, LLC2026-06-302026-08-1538,006$1,272,821None
OSAIC HOLDINGS, INC.2026-06-302026-08-1512,358$413,869None
OSAIC HOLDINGS, INC.2026-06-302026-08-15236$7,903None
Squarepoint Ops LLC2026-06-302026-08-1521,219$710,624None
Man Group plc2026-06-302026-08-1511,469$384,097None
Trexquant Investment LP2026-06-302026-08-1525,645$858,851None
MetLife Investment Management, LLC2026-06-302026-08-1512,880$431,351None
Engineers Gate Manager LP2026-06-302026-08-1517,350$581,052None
JANE STREET GROUP, LLC2026-06-302026-08-1519,516$653,591None
JANE STREET GROUP, LLC2026-06-302026-08-1526,036$871,946None
JANE STREET GROUP, LLC2026-06-302026-08-1557,200$1,915,628Call
Legal & General Group Plc2026-06-302026-08-155,895$197,423None
Legal & General Group Plc2026-06-302026-08-152,017$67,549None
Legal & General Group Plc2026-06-302026-08-152,150$72,004None
HRT FINANCIAL LP2026-06-302026-08-1542,022$1,407,000None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15262,000$8,774,380Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1533,900$1,135,311Put
Verdad Advisers, LP2026-06-302026-08-1512,970$434,365None
Gotham Asset Management, LLC2026-06-302026-08-159,322$312,194None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-1550,562$1,693,321None
LAZARD ASSET MANAGEMENT LLC2026-06-302026-08-1575,425$2,525,983None
FRED ALGER MANAGEMENT, LLC2026-06-302026-08-1520,958$701,883None
Balyasny Asset Management L.P.2026-06-302026-08-15350,442$11,736,303None
Longaeva Partners L.P.2026-06-302026-08-15298,171$9,985,747None
Alyeska Investment Group, L.P.2026-06-302026-08-1535,000$1,172,150None
Woodline Partners LP2026-06-302026-08-15185,535$6,213,567None
Logos Global Management LP2026-06-302026-08-1523,548$788,623None
HighVista Strategies LLC2026-06-302026-08-1529,337$982,496None

90-day public filing window, up to 50 source positions.

Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗VIRGINIA RETIREMENT SYSTEMS ET Al ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Kalehua Capital Management LLC ↗Kalehua Capital Management LLC ↗Aster Capital Management (DIFC) Ltd ↗First Light Asset Management, LLC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.

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