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Nine insider buys in the last year — $4.12M in all.
52 filings on record.
PRTAPROTHENA CORP PUBLIC LTD CO
NasdaqGS · Healthcare · $423.02M
$8.24
-1.08% · Sep 16
Nine insider buys in the last year — $4.12M in all.
Nothing in the last fortnight.
Price · 1Y · daily● 9 buys● 2 sells◆ 1 8-K
▸ hover a marker for the filing · drag to zoom · daily bars sharpen to 30-min on close ranges · 4 moves explained
AI brief · from the filings on this pagePro
The filings, the score and the setup on this page, read for you in about ten seconds — what the insiders did, and what stands against it.
Market cap
$423.02M
Float
34.9M
68% public
Short % float
Pro
Price / profit
—
not yet profitable
Price / future profit
—
Price / sales
7.8
The buyers
▸ each insider's past open-market buys, measured ~6 months (120 trading days) later, against the S&P over the same spans · split-adjusted · pre-scheduled 10b5-1 plan trades excluded · past outcomes, not predictions
10% owner
Scully William P
Bought $1.02M on Jun 11 — 125,000 sh @ $8.17, held direct, 12% of their stake.
No completed positions to measure
Institutional stakes
▸ a holder crossing 5% files Schedule 13D if they intend to act on the company, 13G if they certify they will not · /A amends an earlier filing
27 filingsnewest first
The record
newest first
DateTypeInsiderOf stakeShares @ priceValue
31 more transactions on Pro →Context
Wall St
$21.40 avg target
+159.7% vs today · 5 analysts · consensus Buy
▸ relayed analyst opinion, which tends to run optimistic — not our forecast or advice
Earnings · EPS vs forecast
4 of 5 quarters beat
Q2 '26−$0.31 act+$0.07
Q1 '26$0.68 act+$0.99
Q4 '25−$0.46 act+$0.00
Q3 '25−$0.67 act−$0.13
Coverage
Earnings Beat: Prothena Corporation plc Just Beat Analyst Forecasts, And Analysts Have Been Updating Their ModelsSimply Wall St. · 05-11Wall Street Analysts Think Prothena (PRTA) Could Surge 120.19%: Read This Before Placing a BetZacks · 03-26Stock Market Today, April 29: KalVista Pharmaceuticals Surges on Chiesi Group Acquisition AnnouncementMotley Fool · 04-293 Growth Companies Insiders Are Eager To HoldSimply Wall St. · 04-29
The file stays open
52 filings on record.
The next one will be too.
▸ SEC EDGAR · FINRA · Nasdaq — public sources only · research, not advice