SPTX
Seaport Therapeutics, Inc. · Healthcare · Market cap $1.1B
Insiders bought $20.0M net in the last 90 days ·0 sellers, 2 buyers· latest Form 4 filed Jun 24, 2026
Insider Buying
$20.0M
reported purchases (SEC code P)
Insider Selling
$0
reported sales (SEC code S)
Unique Insiders
2
in the rolling window
Latest filing
Jun 24, 2026
HOMBACH ROBERT J.
Seaport Therapeutics, Inc. (SPTX) has 10 SEC Form 4 filings (15 transaction rows) in the rolling window, disclosed by 2 distinct insiders. Most recent filing: Jun 24, 2026.
Inside the rolling window, 2 insiders at Seaport Therapeutics, Inc. reported 2 open-market purchases totaling $20.0M and no open-market sales. Insiders have net bought $20.0M over the trailing 6 months. The largest single insider purchase in this window was $19.8M by 10% Owner ARCH Venture Partners XII, LLC on May 4, 2026. The most recent open-market filing is a purchase of 13,000 shares by Director HOMBACH ROBERT J., dated Jun 22, 2026, worth $236K.
- Industry:Biotechnology
- CEO:Daphne Zohar
- Employees:58
- HQ:Boston, MA, US
- IPO:2026-05-01
| Source | |||||||
|---|---|---|---|---|---|---|---|
HOMBACH ROBERT J.First filing | Director | Purchase | 13,000 | $236K | Jun 24 | +10.8% | SEC ↗ |
ARCH Venture Partners XII, LLCFirst in 6 months | 10% Owner | Purchase | 1,100,000 | $19.8M | May 4 | +25.8% | SEC ↗ |
Frequently asked questions
How many SEC Form 4 insider filings does SPTX have?
Seaport Therapeutics, Inc. (SPTX) has 10 SEC Form 4 filings (15 transaction rows) in the rolling 365-day window, disclosed by 2 distinct insiders. Most recent filing: Jun 24, 2026.
When was the most recent SEC Form 4 filing for SPTX?
The most recent Form 4 filing for SPTX on Tracefour is dated Jun 24, 2026.
What is the net insider flow at SPTX over the last 6 months?
Over the trailing 180 days, insiders at SPTX have net bought $20.0M based on SEC Form 4 disclosures.
What was the largest insider purchase at SPTX?
The largest single insider open-market purchase at SPTX in the rolling window was $19.8M by 10% Owner ARCH Venture Partners XII, LLC on 2026-05-04.
What is the total insider buy and sell value at SPTX in the current window?
Inside the rolling window, insiders at SPTX bought $20.0M and sold $0 based on SEC Form 4 filings.
Can I get alerts for SPTX insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Seaport Therapeutics, Inc. (SPTX). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Seaport Therapeutics, Inc. is in the Healthcare sector.