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PRTA

NasdaqGSHealthcare
PROTHENA CORP PUBLIC LTD CO
Latest filing · 2026-05-22 · scanner 4d behind
$9.83
0.0%· 24h
Score
50
/ 100
Active candidate
5 triggers firing
Large buyFirst buy 12moNet buying 90dSmall floatDays to cover
Market cap
$514.11M
Float
36.8M
70% of total
Shares out
52,353,237
Short % float
••••
Pro only
Days to cover
••••
Pro only
Price
PRTA
$9.83
$1.19 · +13.8%
3M
Insider buy · 2026-05-22 · $9.81 · SCULLY WILLIAM P
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Rule breakdown50 / 110 pts max
45% of maximum scoreSignalContext
Form 4 signals
Cluster buy
3+ distinct insiders with open-market buys in the last 30 days
–
pts
C-suite buy
CEO, CFO, Chair, or President made an open-market purchase
–
pts
Large single buy
One open-market purchase exceeded the dollar threshold
$981,300
+15
pts
First buy in 12 months
An insider bought for the first time in the trailing 12 months
SCULLY WILLIAM P
+15
pts
Net buying (90d)
Net (buys − sells) USD over the last 90 days is positive
$981,300
+10
pts
Context amplifiers
High short interest
Short interest as % of float exceeds the squeeze threshold
–
pts
Small float
Float is below the threshold — amplifies any accumulation signal
36.8M shares
+5
pts
High days-to-cover
DTC > threshold — shorts can't exit cleanly on a squeeze
16.0d to cover
+5
pts
Volume spike
Most-recent day's volume was >2× the 20-day average
–
pts
TypeDateInsiderTitleSharesPriceValue
Buy2026-05-22
SCULLY WILLIAM P
100,000$9.81$981.3K