HOMBACH ROBERT J.
Director
PurchaseAlert
- Shares
- 13,000
- Price
- $18.14
- Value
- $235,768
SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•32 filings
SPTX
Seaport Therapeutics, Inc.
No net buying or selling imbalance over the last 3 months
No net buyers or sellers account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.
How to read this signal
Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.
3-month balance
$0.00
0 buyers · 0 sellers
12-month purchases
$20,035,768
8 distinct insiders
12-month sales
$0.00
0 distinct insiders
Highlighted alerts
2
0 Rule 10b5-1 trades treated as informational
Buying cluster · 30 days
Fewer than three distinct buyers
CEO/CFO purchases · 12 months
No executive purchases found
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Form 4 raw → Raspberry
The value is in what we do not call a signal.
The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.
41
Raw transactions
Everything returned by the filing
2
Voluntary view
P/S trades after deterministic checks
13
Administrative noise
Stored, never alerted
0
10b5-1
Shown as informational
SEC ownership XML facts
- Code
- A
- Shares
- 1,486,786
- Price
- $0.00
- Footnotes
- 1
The shares underlying this option shall vest in forty-eight (48) equal monthly installments following April 30, 2026, subject to the Reporting Person's continued service on each such vesting date.
Recent transactions
Voluntary purchases and sales; administrative noise stays hidden.
ARCH Venture Partners XII, LLC
10% owner
PurchaseAlert
- Shares
- 1,100,000
- Price
- $18.00
- Value
- $19,800,000
“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.