$SPTX
Seaport Therapeutics, Inc. Common Stock
XNAS
Why is SPTX down today? It is at $22.00 (-1.52%), and our scanner flagged it 3 times on unusual volume this month. See the catalyst behind the move, real-time alerts the moment SPTX spikes, and full due diligence on SPTX — key stats, earnings, dilution and insider activity. Free.
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Key Stats
- Price
- $22.00
- Change today
- -1.52%
- Previous close
- $22.34
- 52-week range
- $14.85 – $23.00
- Market cap
- $1.20B
- Institutional own.
- 3.92%
- Total held
- 22.3%
- Tradeable float
- 41.6M 78% of shares · after 18% insiders + 4% institutions
- Short interest
- 2.0M ▼ -29% vs prior · as of 2026-07-15
- Short % of float
- 4.8%
- Days to cover
- 12.3d
- Avg daily volume
- 300K
- Exchange
- XNAS
- 5m
- 0.8x
- 15m
- 0.8x
- 1h
- 1.2x
- 1D
- --
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Why is $SPTX down today?
Here is the latest on SPTX from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for SPTX today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
Likely catalystQuarterly report (10-Q), from the latest SEC filing. Read it →Analyst data via Nasdaq. Not investment advice.
Insiders
Insiders buying2 open-market buys1 buys, 0 sells last 3 months (11/0 over 12 months)Show 11 recent transactionsMinimize 11 recent transactions
| Insider | Action | Shares | % of position | Owns after | Value | Date |
|---|---|---|---|---|---|---|
Hombach Robert J. Director | Bought (open market) | +13K 0.02% of company | n/a | 13K | $236K at $18.14 | Jun 22, 26 |
Loebel Antony Officer | Acquired (grant/award) | +20K 0.04% of company | n/a | 20K | n/a | May 4, 26 |
Arch Venture Partners Xii, Llc Beneficial Owner (10%) | Acquired (grant/award) | +5.19M 9.7% of company | n/a | 5.19M | n/a | May 4, 26 |
Arch Venture Partners Xii, Llc Beneficial Owner (10%) | Bought (open market) | +1.10M 2.1% of company | added 21% | 6.29M | $19.8M at $18.00 | May 4, 26 |
Paul Steven M Director | Acquired (grant/award) | +67K 0.1% of company | added 8.4% | 863K | n/a | May 4, 26 |
Torres Denice Director | Acquired (grant/award) | +13K 0.03% of company | n/a | 13K | n/a | May 4, 26 |
Chen Michael Cunyuan Officer | Acquired (grant/award) | +3K | n/a | 3K | n/a | May 4, 26 |
Gladstein Lana Officer | Acquired (grant/award) | +34K 0.06% of company | n/a | 34K | n/a | May 4, 26 |
White Lauren Officer | Acquired (grant/award) | +7K 0.01% of company | n/a | 7K | n/a | May 4, 26 |
Healy James Director | Acquired (grant/award) | +2.73M 5.1% of company | n/a | 2.73M | n/a | May 4, 26 |
Puretech Health Plc Beneficial Owner (10%) | Acquired (grant/award) | +16.38M 30.6% of company | added 100% | 16.69M | n/a | May 4, 26 |
Recent Form-4 filings via Nasdaq. Open-market buys are the signal worth watching. Grants and automatic (10b5-1) sells are routine. “% of position” is the share of that insider’s own holding the trade moved. Not investment advice.
Dilution watch
Recent offeringAt-the-market (ATM) offering active — the company can keep selling new shares into the market over time (ongoing). If $SPTX runs, these filings show who may be positioned to sell new or newly-registered shares into the move.
- At-the-market (ATM) program — sells new shares into the market gradually over time · About $50M in size · Priced at $18.00/share
Sourced from SEC EDGAR filings (last 9 months); terms read straight from the filing text where available. Ongoing = an at-the-market (ATM) program still selling over time or a live shelf, so it can keep diluting; Completed = a one-time priced sale that already finished. A shelf (S-3) stays effective ~3 years. Form type signals dilution capacity, not an exact share count, and we can't confirm how much of a shelf or ATM remains unused. Not investment advice.
$SPTX Sentiment
BearishBlend of news sentiment, today’s move, and community votes. Not investment advice.
$SPTX Activity
News, unusual-volume alerts, AI-trader trades and community chatter — the whole story, newest first.
SPTX stock FAQ
Why is $SPTX down today?
Here is the latest on SPTX from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for SPTX today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
What is the SPTX stock price today?
SPTX last traded at $22.00, down 1.52% on the day. The price and chart above update live during market hours (4 AM to 8 PM ET).
Where can I see live SPTX alerts?
The SPTX Live Alerts panel on this page streams real-time unusual volume (RVOL), momentum, halt and 200-EMA alerts from our scanner the moment they fire. Our scanner has flagged SPTX 3 times in the last 30 days.
What exchange is SPTX on?
SPTX (Seaport Therapeutics, Inc. Common Stock) trades on XNAS, with a market cap of about $1.20B.
Is SPTX good for day trading?
That depends on your strategy and risk. Day traders look for volume, volatility and a clear trend. Use the live chart, RVOL alerts and 200-EMA context on this page to judge SPTX for yourself. This is not investment advice.
Live data from TheDesperateTrader scanner. Not investment advice.