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Long Daniel D.

Disclosed activity across 1 company

Tapewire entity
2453
SEC CIK
0002040349

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Septerna, Inc.SEPN · Entity 2452SVP, Drug DiscoverySeptember 01, 2026September 03, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Septerna, Inc.

Report date September 01, 2026 · Filed September 03, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect96,412 Ending reported balance After 2026-09-01 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-09-01 · Exercise / conversion · Acquired 3,333 · Balance 99,745

Row 2 · 2026-09-01 · Sale · Disposed 3,333 · Balance 96,412

F1: This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on March 20, 2026.

F2: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $37.34 to $38.21. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $2.76 · Expires 2034-03-19Direct9,085 Reported balance After 2026-09-01 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-09-01 · Exercise / conversion · Disposed 3,333 · Balance 9,085

F3: 1/48th of the shares subject to such option shall vest and become exercisable in substantially equal monthly installments on each monthly anniversary of March 1, 2024, subject to the Reporting Person's continuous service to the Issuer on each such date.

Filing footnotes · ownership attribution and instrument terms

F1: This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on March 20, 2026.

F2: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $37.34 to $38.21. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

F3: 1/48th of the shares subject to such option shall vest and become exercisable in substantially equal monthly installments on each monthly anniversary of March 1, 2024, subject to the Reporting Person's continuous service to the Issuer on each such date.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
September 01, 2026 Filed Sep 3, 2026 23:01 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionStock Option (Right to Buy) · Derivative 3,333 $0.00 Strike: $2.76 $0.00
Disclosure

SEC source: 0001193125-26-382267 · ownership.xml · derivative · entry 3

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,085

Underlying: Common Stock · 3,333 shares

Expires 2034-03-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: 1/48th of the shares subject to such option shall vest and become exercisable in substantially equal monthly installments on each monthly anniversary of March 1, 2024, subject to the Reporting Person's continuous service to the Issuer on each such date.

Read SEC document
September 01, 2026 Filed Sep 3, 2026 23:01 UTC Septerna, Inc. SEPN · Entity 2452 SaleCommon Stock 3,333 $37.83 $126,077.72
Disclosure

SEC source: 0001193125-26-382267 · ownership.xml · nonDerivative · entry 2

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 96,412

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on March 20, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $37.34 to $38.21. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Read SEC document
September 01, 2026 Filed Sep 3, 2026 23:01 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionCommon Stock 3,333 $2.76 $9,199.08
Disclosure

SEC source: 0001193125-26-382267 · ownership.xml · nonDerivative · entry 1

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 99,745

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
August 03, 2026 Filed Aug 5, 2026 23:00 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionStock Option (Right to Buy) · Derivative 1,518 $0.00 Strike: $2.76 $0.00
Disclosure

SEC source: 0001193125-26-335820 · ownership.xml · derivative · entry 6

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,418

Underlying: Common Stock · 1,518 shares

Expires 2034-03-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: 1/48th of the shares subject to such option shall vest and become exercisable in substantially equal monthly installments on each monthly anniversary of March 1, 2024, subject to the Reporting Person's continuous service to the Issuer on each such date.

Read SEC document
August 03, 2026 Filed Aug 5, 2026 23:00 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionStock Option (Right to Buy) · Derivative 1,816 $0.00 Strike: $2.76 $0.00
Disclosure

SEC source: 0001193125-26-335820 · ownership.xml · derivative · entry 5

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,227

Underlying: Common Stock · 1,816 shares

Expires 2033-11-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: 1/48th of the shares subject to such option shall vest and become exercisable in substantially equal monthly installments on each monthly anniversary of August 1, 2023, subject to the Reporting Person's continuous service to the Issuer on each such date.

Read SEC document
August 03, 2026 Filed Aug 5, 2026 23:00 UTC Septerna, Inc. SEPN · Entity 2452 SaleCommon Stock 2,334 $34.68 $80,944.29
Disclosure

SEC source: 0001193125-26-335820 · ownership.xml · nonDerivative · entry 4

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 96,412

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on March 20, 2026.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.43 to $35.04. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Read SEC document
August 03, 2026 Filed Aug 5, 2026 23:00 UTC Septerna, Inc. SEPN · Entity 2452 SaleCommon Stock 1,000 $33.98 $33,975.60
Disclosure

SEC source: 0001193125-26-335820 · ownership.xml · nonDerivative · entry 3

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 98,746

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on March 20, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $33.39 to $34.32. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Read SEC document
August 03, 2026 Filed Aug 5, 2026 23:00 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionCommon Stock 1,518 $2.76 $4,189.68
Disclosure

SEC source: 0001193125-26-335820 · ownership.xml · nonDerivative · entry 2

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 99,746

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
August 03, 2026 Filed Aug 5, 2026 23:00 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionCommon Stock 1,816 $2.76 $5,012.16
Disclosure

SEC source: 0001193125-26-335820 · ownership.xml · nonDerivative · entry 1

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 98,228

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
July 01, 2026 Filed Jul 2, 2026 23:00 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionStock Option (Right to Buy) · Derivative 3,333 $0.00 Strike: $2.76 $0.00
Disclosure

SEC source: 0001193125-26-295106 · ownership.xml · derivative · entry 4

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,043

Underlying: Common Stock · 3,333 shares

Expires 2033-11-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: 1/48th of the shares subject to such option vest and become exercisable in substantially equal monthly installments on each monthly anniversary of August 1, 2023, subject to the Reporting Person's continuous service to the Issuer on each such date.

Read SEC document
July 01, 2026 Filed Jul 2, 2026 23:00 UTC Septerna, Inc. SEPN · Entity 2452 SaleCommon Stock 1,233 $34.81 $42,925.79
Disclosure

SEC source: 0001193125-26-295106 · ownership.xml · nonDerivative · entry 3

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 96,412

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on March 20, 2026.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.52 to $35.10. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Read SEC document
July 01, 2026 Filed Jul 2, 2026 23:00 UTC Septerna, Inc. SEPN · Entity 2452 SaleCommon Stock 2,100 $34.10 $71,602.44
Disclosure

SEC source: 0001193125-26-295106 · ownership.xml · nonDerivative · entry 2

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 97,645

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on March 20, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $33.49 to $34.46. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Read SEC document
July 01, 2026 Filed Jul 2, 2026 23:00 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionCommon Stock 3,333 $2.76 $9,199.08
Disclosure

SEC source: 0001193125-26-295106 · ownership.xml · nonDerivative · entry 1

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 99,745

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 22, 2026 Filed Jun 24, 2026 23:24 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionStock Option (Right to Buy) · Derivative 4,471 $0.00 Strike: $11.70 $0.00
Disclosure

SEC source: 0001193125-26-281461 · ownership.xml · derivative · entry 6

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,529

Underlying: Common Stock · 4,471 shares

Expires 2035-08-06

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F6 · derivative.exercise_date: 1/48th of the shares subject to such option shall vest and become exercisable in substantially equal monthly installments on each monthly anniversary of August 1, 2025, subject to the Reporting Person's continuous service to the Issuer on each such date.

Read SEC document
June 22, 2026 Filed Jun 24, 2026 23:24 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionStock Option (Right to Buy) · Derivative 10,529 $0.00 Strike: $2.76 $0.00
Disclosure

SEC source: 0001193125-26-281461 · ownership.xml · derivative · entry 5

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,376

Underlying: Common Stock · 10,529 shares

Expires 2033-11-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: 1/48th of the shares subject to such option vest and become exercisable in substantially equal monthly installments on each monthly anniversary of August 1, 2023, subject to the Reporting Person's continuous service to the Issuer on each such date.

Read SEC document
June 22, 2026 Filed Jun 24, 2026 23:24 UTC Septerna, Inc. SEPN · Entity 2452 SaleCommon Stock 7,000 $35.97 $251,780.90
Disclosure

SEC source: 0001193125-26-281461 · ownership.xml · nonDerivative · entry 4

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 96,412

F2 · kind: This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on March 20, 2026.

F4 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $35.71 to $36.34. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Read SEC document
June 22, 2026 Filed Jun 24, 2026 23:24 UTC Septerna, Inc. SEPN · Entity 2452 SaleCommon Stock 8,000 $35.10 $280,800.80
Disclosure

SEC source: 0001193125-26-281461 · ownership.xml · nonDerivative · entry 3

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 103,412

F2 · kind: This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on March 20, 2026.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.70 to $35.64. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

Read SEC document
June 22, 2026 Filed Jun 24, 2026 23:24 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionCommon Stock 4,471 $11.70 $52,310.70
Disclosure

SEC source: 0001193125-26-281461 · ownership.xml · nonDerivative · entry 2

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 111,412

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
June 22, 2026 Filed Jun 24, 2026 23:24 UTC Septerna, Inc. SEPN · Entity 2452 Exercise / conversionCommon Stock 10,529 $2.76 $29,060.04
Disclosure

SEC source: 0001193125-26-281461 · ownership.xml · nonDerivative · entry 1

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 106,941

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Includes 3,501 shares acquired under the Septerna, Inc. 2024 Employee Stock Purchase Plan on April 30, 2026 in a transaction that was exempt under Rule 16b-3(c).

Read SEC document
February 06, 2026 Filed Feb 11, 2026 00:17 UTC Septerna, Inc. SEPN · Entity 2452 GrantStock Option (Right to Buy) · Derivative 80,000 $0.00 Strike: $25.41 $0.00
Disclosure

SEC source: 0001193125-26-045118 · ownership.xml · derivative · entry 1

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,000

Underlying: Common Stock · 80,000 shares

Expires 2036-02-05

F1 · derivative.exercise_date: 2/48th of the shares subject to such option shall vest and become exercisable on March 1, 2026 and the remaining shares subject to the option shall vest in 46 substantially equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continuous service to the Issuer on each such date.

Read SEC document
November 10, 2025 Filed Nov 14, 2025 01:13 UTC Septerna, Inc. SEPN · Entity 2452 SaleCommon Stock 3,501 $18.06 $63,223.16
Disclosure

SEC source: 0001193125-25-280756 · ownership.xml · nonDerivative · entry 1

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,911

F1 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.04 to $18.16. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

F2 · balance_after: Includes 3,501 shares acquired under the Septerna, Inc. 2024 Employee Stock Purchase Plan on October 31, 2025 in transactions that were exempt under Rule 16b-3(c).

Read SEC document
August 07, 2025 Filed Aug 11, 2025 23:03 UTC Septerna, Inc. SEPN · Entity 2452 GrantStock Option (Right to Buy) · Derivative 30,000 $0.00 Strike: $11.70 $0.00
Disclosure

SEC source: 0000950170-25-106792 · ownership.xml · derivative · entry 1

Long Daniel D. · CIK 0002040349 · SVP, Drug Discovery

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Common Stock · 30,000 shares

Expires 2035-08-06

F1 · derivative.exercise_date: 1/48th of the shares subject to such option shall vest and become exercisable in substantially equal monthly installments on each monthly anniversary of August 1, 2025, subject to the Reporting Person's continuous service to the Issuer on each such date.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.