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SPTX Insider Trading

Insider Ownership Percentage: N/A
Insider Buying (Last 12 Months): $20,035,820.00
Insider Selling (Last 12 Months): $0.00

Seaport Therapeutics Insider Trading History Chart

This chart shows the insider buying and selling history at Seaport Therapeutics by year and by quarter.

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Seaport Therapeutics Share Price & Price History

Current Price: $22.14
Price Change: ▼ Price Decrease of -0.82 (-3.57%)
As of 09/16/2026 04:00 PM ET

This chart shows the closing price history over time for SPTX up to the past year.

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Days: 30 | 90 | 365

Seaport Therapeutics Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
6/22/2026Robert J. HombachDirectorBuy13,000$18.14$235,820.0013,000View SEC Filing Icon  
5/4/2026Arch Venture Partners Xii, LlcMajor ShareholderBuy1,100,000$18.00$19,800,000.006,294,951View SEC Filing Icon  
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SEC Filings (Institutional Ownership Changes) for Seaport Therapeutics (NASDAQ:SPTX)

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at SPTX by year and by quarter.

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Seaport Therapeutics Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/9/2026The Manufacturers Life Insurance Company82,565$1.79M0.0%N/A0.154%Search for SEC Filing on Google Icon
9/9/2026Squarepoint Ops LLC24,753$0.54M0.0%N/A0.046%Search for SEC Filing on Google Icon
9/2/2026Citadel Advisors LLC191,144$4.15M0.0%N/A0.357%Search for SEC Filing on Google Icon
8/26/2026HighTower Advisors LLC16,666$0.36M0.0%N/A0.031%Search for SEC Filing on Google Icon
8/21/2026Braidwell LP500,000$10.86M0.4%N/A0.934%Search for SEC Filing on Google Icon
8/20/2026Alyeska Investment Group L.P.75,000$1.63M0.0%N/A0.140%Search for SEC Filing on Google Icon
8/10/2026TRV GP VI LLC2,061,222$44.77M0.0%N/A3.851%Search for SEC Filing on Google Icon
Data available starting January 2016

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Seaport Therapeutics logo
Seaport Therapeutics Inc. is a clinical-stage therapeutics company focused on inventing and developing new medicines for patients with depression, anxiety and other debilitating neuropsychiatric disorders. Seaport Therapeutics Inc. is based in BOSTON.
Read More on Seaport Therapeutics

Today's Range

Now: $22.14
Low: $21.98
High: $24.61

50 Day Range

MA: $22.72
Low: $19.52
High: $27.84

52 Week Range

Now: $22.14
Low: $14.85
High: $28.38

Volume

235,897 shs

Average Volume

133,699 shs

Market Capitalization

$1.19 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

N/A

Who are the company insiders with the largest holdings of Seaport Therapeutics?

Seaport Therapeutics' top insider investors include:
  1. Arch Venture Partners Xii, Llc (Major Shareholder)
  2. Robert J Hombach (Director)
Learn More about top insider investors at Seaport Therapeutics.

Who are the major institutional investors of Seaport Therapeutics?

Seaport Therapeutics' top institutional shareholders include:
  1. TRV GP VI LLC — 3.85%
  2. Braidwell LP — 0.93%
  3. Citadel Advisors LLC — 0.36%
  4. The Manufacturers Life Insurance Company — 0.15%
  5. Alyeska Investment Group L.P. — 0.14%
  6. Squarepoint Ops LLC — 0.05%
Learn More about top institutional investors of Seaport Therapeutics stock.

Which major investors are buying Seaport Therapeutics stock?

During the last quarter, SPTX stock was acquired by institutional investors including:
  1. TRV GP VI LLC
  2. Braidwell LP
  3. Citadel Advisors LLC
  4. The Manufacturers Life Insurance Company
  5. Alyeska Investment Group L.P.
  6. Squarepoint Ops LLC
  7. HighTower Advisors LLC
Within the last year, these company insiders have bought Seaport Therapeutics stock:
  1. Arch Venture Partners Xii, Llc (Major Shareholder)
  2. Robert J Hombach (Director)
Learn More investors buying Seaport Therapeutics stock.

Seaport Therapeutics Active Insiders

Robert J Hombach
Director
1 recent trades