Seaport Therapeutics, Inc. reported results
SEC 8-KRead source ↗
Seaport Therapeutics, Inc. is a US-listed company in the biotechnology industry. Its financial year ends in December.
Who’s trading
What company insiders, investment funds and members of Congress have been doing with the stock, from their own filings.
- Insiders2 buying, 0 selling2 purchases and 0 sales by directors and officers, last 12 monthsInsider trades
- Funds53 adding, 0 cuttingOf 16 active managers that changed their stake, 16 added; quarter to June 30, 2026Fund buyers and sellers
The Fundamentalytics view
Current signal Results well ahead of expectations: Reported earnings per share beat the analysts' consensus estimate by 12% in the quarter to 2026-09-30.
Assembled from SEC-filed figures — the full workings are on this page and in our methodology. Observations, not recommendations.
Highlights
How we pick theseStrengths
Nothing in Seaport Therapeutics, Inc.'s latest figures clears our strength thresholds.
Things to watch
- Volatile shares. Over the past year the shares showed annualised volatility of 75% and a beta of 0.8 against the S&P 500.
- Short interest rising. Shares sold short rose 18% in a month to 7.3% of tradable shares.
Latest results
- Earnings per share
- -$0.49 against an average estimate of -$0.56: beat by 12.0%
- Share reaction
- +4.7% in the first session after the results on August 3, 2026, against +3.3% for the S&P 500
- Next report
- November 2, 2026; average EPS estimate -$0.56
Price chart
- 1 day+0.6%
- 1 week-5.4%
- 1 month+9.3%
Loading chart…
Third-party market data · may be delayed
At a glance
Earnings
- Last results
- November 2, 2026
- Next results (est.)
- January 15, 2027
News & updates
Company announcements, filed results and changes that matter to shareholders.
- Results
- Results
Seaport Therapeutics, Inc. reported results
SEC 8-KRead source ↗
No model value for Seaport Therapeutics, Inc. at the moment. Current status: limited reported history: available models are shown without a Buy/Hold/Sell rating. Available reported financials are shown below.
Valuation models
We value Seaport Therapeutics, Inc. as an operating company, with every model that fits that kind of business. Cost of equity 9.9%: the 10-year Treasury yield (4.9%) plus a beta of 1.1 times a 4.5% equity risk premium.
| Model | Value per share | In the combined value? |
|---|---|---|
| Price-to-earnings vs peers Earnings per share times peers' typical (harmonic-mean) price-to-earnings. | — | Does not apply: no twelve-month earnings or share count in the filings yet |
| Residual income Book value plus the present value of returns above the cost of equity, fading over ten years. | — | Does not apply: no twelve-month earnings or share count in the filings yet |
| Justified price-to-book Book value times (return on equity - growth) / (cost of equity - growth): steady-state returns. | — | Does not apply: no twelve-month earnings or share count in the filings yet |
| Revenue-to-maturity model Revenue grown to maturity with the cash margin moving to the industry's; for companies not yet profitable. | — | Does not apply: revenue and margins don't support a positive value |
| Price-to-sales vs peers Sales per share times peers' typical price-to-sales; used only when earnings are negative. | — | Does not apply: no twelve-month earnings or share count in the filings yet |
| Combined value Weighted average of the models that apply: the primary model (price-to-earnings vs peers) counts double. Models more than 5x or less than 0.2x the share price, or more than 3x away from the other models' median, are left out. | — | No model applies: the filings don’t yet support a value. |
Different models fail in different ways, so where several apply we average them rather than trust one. Peer-based models compare Seaport Therapeutics, Inc. with Biotechnology in our coverage, using third-party market data. Model values are estimates under stated assumptions, updated as new filings arrive; not price targets or investment advice. How each model works.
Moat
Not assessed: fewer than five years of comparable figures in the filings. AI disruption exposure for this industry: Medium.
Forecasts and guidance
Analysts' consensus
| Fiscal year | EPS | Growth | Revenue | Growth |
|---|---|---|---|---|
| Current | −$7.37 | — | — | — |
| Next | −$2.50 | +66% | — | 0% |
How the EPS forecast has moved
The consensus EPS forecast for the current fiscal year is +18.1% on 90 days ago. In the last 30 days, 0 analysts raised Seaport Therapeutics, Inc.'s forecast and 3 cut it.
Average of analysts' published estimates (third-party data).
View chart data
| Period | Current fiscal year | Next fiscal year |
|---|---|---|
| 90 days ago | −$6.24 | −$2.58 |
| 60 days ago | −$5.90 | −$2.57 |
| 30 days ago | −$5.90 | −$2.57 |
| 7 days ago | −$5.59 | −$2.52 |
| Now | −$7.37 | −$2.50 |
Earnings against estimates
| Quarter to | Estimate | Actual | Surprise |
|---|---|---|---|
| Sept 2026 | −$0.56 | −$0.49 | +12.0% |
| Jun 2026 | −$0.66 | −$1.78 | −171.2% |
| Mar 2026 | −$8.17 | −$10.34 | −26.6% |
Adjusted EPS as companies report it, against the average analyst estimate.
Positioning
- Short interest
- 7.3% of tradable shares
- Days to cover
- 12.17 at average volume
- Short interest, 1 month
- +18% to October 15, 2026
- Held by institutions
- 71% of shares
- Held by insiders
- 35.1% of shares
- Employees
- 58 full time
Share-price performance
Market data may be delayedPrice behaviour
- 52-week range
- Not enough history
- From 52-week high
- —
- vs 50-day average
- −5.0%
- vs 200-day average
- —
- Volatility (1 year)
- 75%
- Beta vs S&P 500
- 0.76
Share price after results
- Next day
- 2 up, 0 down typical move ±6.1%
- After a week
- 2 up, 0 down typical move ±9.3%
- After a month
- 2 up, 0 down typical move ±20.1%
| Results released | Next day | S&P 500 next day | 5 days | 21 days |
|---|---|---|---|---|
| August 3, 2026 | +4.7% | +3.3% | +12.5% | +15.4% |
| June 8, 2026 | +7.4% | −0.1% | +6.1% | +24.8% |
Fundamentals
Who owns it
Funds buying and selling- Reported value
- $814M
- Institutions reporting
- 54
- Positions opened / closed
- 53 / 0
| Manager | Value | Shares | Share of 13F value | Shares QoQ |
|---|---|---|---|---|
| Arch Venture Management, LLC | $137M | 6.3M | 16.8% | — |
| General Atlantic, L.P. | $133M | 6.1M | 16.3% | — |
| Sofinnova Investments, Inc. | $77.4M | 3.6M | 9.5% | — |
| Goldman Sachs Group Inc | $47.3M | 2.2M | 5.8% | — |
| Trv Gp Vi, LLC | $44.8M | 2.1M | 5.5% | — |
| Canada Pension Plan Investment Board | $42.9M | 2.0M | 5.3% | — |
| Jpmorgan Chase & Co | $40.9M | 1.8M | 5.0% | — |
| Foresite Capital Management Vi LLC | $38.7M | 1.8M | 4.7% | — |
| Price T Rowe Associates Inc | $28.4M | 1.3M | 3.5% | — |
| FMR LLC | $25.7M | 1.2M | 3.2% | — |
| Bellevue Group AG | $23.9M | 1.1M | 2.9% | — |
| Siren, L.L.C. | $23.8M | 1.1M | 2.9% | — |
From Form 13F filings with the SEC ( quarterly data sets), as reported by each manager for June 30, 2026 and filed up to 45 days later. 13F reports cover long US-listed positions of managers above $100M only, so this is not Seaport Therapeutics, Inc.'s complete shareholder register. Values are as reported by the filers .
Insider trading activity
Full insider history and chart Insider purchases History → $20M 2 trades by 2 insiders, last 12 months Insider sales History → $0 0 trades by 0 insiders
Net ▲ $20M net buying
| Insider | Date | Trade | Shares | Price | Value |
|---|---|---|---|---|---|
| Hombach Robert J. Director | June 22, 2026 | Buy | 13,000 | $18.14 | $235,820 |
| Arch Venture Partners Xii, L.P. 10% owner | May 4, 2026 | Buy | 1,100,000 | $18.00 | $19.8M |
From insiders' Form 4 filings with the SEC. Excludes awards, option exercises and shares withheld for tax. "Pre-set plan" means the filing marks the trade as made under a Rule 10b5-1 plan. See every insider trade since five years ago, on a price chart.
Earnings dates and SEC filings
Results announcements
Next expected around January 15, 2027 estimated from the company's past filing pattern, not announced
- November 2, 2026
- August 3, 2026
- June 8, 2026
Recent SEC filings
- 10-Q Quarterly report
- 8-K Current report
- 10-Q Quarterly report
- 8-K Current report
- 10-Q Quarterly report
- 8-K Current report
- 8-K Current report
- S-1 S-1
Data status
| Data | Last updated | Source |
|---|---|---|
| Share price | Exchange closing prices | |
| News and updates | Company releases and SEC 8-K filings | |
| Analyst estimates | Aggregated analyst estimates | |
| Valuation and scores | Our models, from the filed figures |
Seaport Therapeutics, Inc. in brief
- What does Seaport Therapeutics, Inc. do?
- Seaport Therapeutics, Inc. is a US-listed company in the biotechnology industry. Its financial year ends in December.
- What is Seaport Therapeutics, Inc.'s stock ticker?
- Seaport Therapeutics, Inc. trades under the ticker SPTX on Nasdaq. This page brings together its financial statements, valuation models, ownership and recent company updates.
- Who are Seaport Therapeutics, Inc.'s largest institutional shareholders?
- By value reported in 13F filings for June 30, 2026, the largest reported holders are Arch Venture Management, LLC, General Atlantic, L.P. and Sofinnova Investments, Inc. 13F reports cover long US-listed positions of managers above $100M, filed up to 45 days after quarter end.
- Are insiders buying or selling Seaport Therapeutics, Inc. stock?
- Over the last 12 months, Seaport Therapeutics, Inc.'s directors and officers reported 2 open-market purchases and 0 sales on Form 4. The insider trading page charts every trade.
- When is Seaport Therapeutics, Inc.'s next earnings date?
- Around January 15, 2027, estimated from the spacing of its past results announcements (8-K filings). That is an estimate, not a confirmed date — Seaport Therapeutics, Inc. announces its own schedule.
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