Open-market BuyHigh signal 82/100
filed 2026-10-09SPInsider
SCULLY WILLIAM P - 10% Owner - $1.05M
Open-market purchases use the insider's own money, so they are generally more informative than awards or option mechanics.
View source filingP
SEC EDGAR - Form 4 insider activity
Prothena Corp Public Ltd Co $PRTA
Tracked equity - 4 filings indexed by Nortis
Nortis signal thesis
Buying activity is leading recent insider flow.
4
OM buys - 90d
0
OM sells - 90d
0
Routine filings
0
Cluster filings
$1.41M
Largest trade
79/100
Avg signal score
Filing tape
Recent filings
Open-market BuyHigh signal 76/100
filed 2026-10-06SPInsider
SCULLY WILLIAM P - 10% Owner - $857.2K
Open-market purchases use the insider's own money, so they are generally more informative than awards or option mechanics.
View source filingOpen-market BuyHigh signal 82/100
filed 2026-09-30SPInsider
SCULLY WILLIAM P - 10% Owner - $1.41M
Open-market purchases use the insider's own money, so they are generally more informative than awards or option mechanics.
View source filingOpen-market BuyHigh signal 76/100
filed 2026-09-29SPInsider
SCULLY WILLIAM P - 10% Owner - $889.9K
Open-market purchases use the insider's own money, so they are generally more informative than awards or option mechanics.
View source filing