Septerna Inc

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Septerna Inc
TickerSEPN
CIK #0001984086
CUSIP81734D104
SectorLife Sciences - Pharmaceutical Preparations
Address250 East Grand Avenue, Suite 65, South San Francisco, CA 94080
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
Septerna Inc 2023-07-13 73.5 M Exemption: 506(b) · Remaining: $76,500,001 · Duration: One year or less · Revenue: Decline to Disclose
CIK Filing 2011 - 2026
[0001984086] 10-K
[0001984086] 10-Q
[0001984086] 3
[0001984086] 4
[0001984086] 8-K
[0001984086] D
[0001984086] SC 13D
[0001984086] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Driehaus Capital Management LLC Septerna Inc [2025-02-14] 0.0
Third Rock Ventures V LP Septerna Inc [2025-02-13] 0.0
Samsara Biocapital LP Septerna Inc [2024-11-04] 6.2
RA Capital Management LP Septerna Inc [2024-11-04] 15.8
Biotechnology Value Fund L P Septerna Inc [2024-11-01] 2.9
Form 3/4/5 Filer 2011 - 2026
Long Daniel D
Septerna Inc
Shah Rajeev M
RA Capital Healthcare Fund LP
RA Capital Nexus Fund III LP
RA Capital Management LP
Kolchinsky Peter
Shaikhly Samira
Bassan Abraham
Sharp Shalini
Coulie Bernard
Tong Jeffrey K
Gottesdiener Keith Michael
Simson Jake
Ezekowitz Alan
Bhatt Elizabeth
Wilson Mark Andrew
Klein Uwe
Labrucherie Gil M
Kim Jae B
Finer Jeffrey
Third Rock Ventures V LP
Third Rock Ventures GP V LP
TRV GP VI LLC
TRV GP V LLC
Third Rock Ventures VI LP
Third Rock Ventures GP VI LP
Xiao Ran
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Shaikhly Samira
Stock Option (Right to Buy) · derivative
2026-03-02 Option exercise 53,714 $0.00
Shaikhly Samira
Stock Option (Right to Buy) · derivative
2026-03-02 Option exercise 5,101 $0.00
Shaikhly Samira
Stock Option (Right to Buy) · derivative
2026-03-02 Option exercise 11,638 $0.00
Shaikhly Samira
Common Stock
2026-03-02 Sell 4,090 $27.51 112,516
Shaikhly Samira
Common Stock
2026-03-02 Option exercise 5,101 $2.76 14,079
Shaikhly Samira
Common Stock
2026-03-02 Sell 66,363 $28.14 1,867,455
Shaikhly Samira
Common Stock
2026-03-02 Option exercise 11,638 $2.76 32,121
Shaikhly Samira
Common Stock
2026-03-02 Option exercise 53,714 $1.55 83,257
Bhatt Elizabeth
Stock Option (Right to Buy) · derivative
2026-02-18 Option exercise 4,000 $0.00
Bhatt Elizabeth
Common Stock
2026-02-18 Sell 1,800 $29.58 53,244
Bhatt Elizabeth
Common Stock
2026-02-18 Sell 2,200 $28.46 62,612
Bhatt Elizabeth
Common Stock
2026-02-18 Option exercise 4,000 $6.81 27,240
Bhatt Elizabeth
Stock Option (Right to Buy) · derivative
2026-02-06 Grant 155,000 $0.00
Long Daniel D
Stock Option (Right to Buy) · derivative
2026-02-06 Grant 80,000 $0.00
Klein Uwe
Stock Option (Right to Buy) · derivative
2026-02-06 Grant 80,000 $0.00
Shaikhly Samira
Stock Option (Right to Buy) · derivative
2026-02-06 Grant 80,000 $0.00
Labrucherie Gil M
Stock Option (Right to Buy) · derivative
2026-02-06 Grant 125,000 $0.00
Kim Jae B
Stock Option (Right to Buy) · derivative
2026-02-06 Grant 125,000 $0.00
Finer Jeffrey
Stock Option (Right to Buy) · derivative
2026-02-06 Grant 400,000 $0.00
Wilson Mark Andrew
Stock Option (Right to Buy) · derivative
2026-02-06 Grant 165,000 $0.00
showing 20 of 74 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 125 45,986,954
2025-12-31 123 45,811,880
2025-09-30 85 45,322,952
2025-06-30 91 45,522,890
2025-03-31 74 45,392,878
2024-12-31 72 43,627,352
Form 13F Holdings
Firm Period DFND Voting Shares
Gamma Investing LLC [2026-06-30] DFND 1,119 1,119
Versant Capital Management Inc [2026-06-30] SOLE 261 261
MassMutual Private Wealth & Trust FSB [2026-06-30] SOLE 104 104
Fortitude Family Office LLC [2026-06-30] SOLE 20 20
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