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WAVEMAN · COMPANY
PRTA · Prothena Corp Public Ltd Co
> Ask across nine datasets ⌘K
LIVE
TEAM-0.32% 13F +439META+3.01% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV+4.49% 13F +693CRM+2.92% 13F +1,018CVNA-0.98% 13F +794TPL-0.71% 13F +444NET+4.32% 13F +710MSTR+17.56% 13F +526DELL+4.91% 13F +1,203CRWD+5.68% 13F +1,382ANET+1.22% 13F +1,323COIN+10.14% 13F +475TEAM-0.32% 13F +439META+3.01% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV+4.49% 13F +693CRM+2.92% 13F +1,018CVNA-0.98% 13F +794TPL-0.71% 13F +444NET+4.32% 13F +710MSTR+17.56% 13F +526DELL+4.91% 13F +1,203CRWD+5.68% 13F +1,382ANET+1.22% 13F +1,323COIN+10.14% 13F +475
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PRTA

PROTHENA CORP PUBLIC LTD CO
PHARMA & BIOTECH · PHARMACEUTICAL PREPARATIONS · CIK 0001559053
FORM 144 · 2☆ WATCH
INSIDER NET · 180D
$4.0M
open-market buys minus sells, Form 4 codes P and S
INSIDER BUYERS · 180D
1
CONGRESS BUYERS · 1Y
0
FUNDS ADDED · QTR
0
13F, latest reported quarter
REVENUE GROWTH
-92.8%
XBRL, annual
NET MARGIN
-2520.6%
CONVERSIONS · 180D
6
codes C/M, not in net · no price filed
SEVEN FACTS, RANKED AGAINST THE SECTOR · RANK IS NOT A FORECAST
INSIDERS
net +$4.0M over 180 days
+$2.1M over 90 days · +$4.1M of it by a 10%+ holder
more than 93% of Pharma & Biotech
CONGRESS
no member of Congress has reported trading it
FUNDS
fewer than five institutions report holding it
REVENUE
-92.8% year over year
below 92% of Pharma & Biotech
MARGIN
-2520.6% net margin
below 95% of Pharma & Biotech
BUYBACKS
no share repurchases reported
SHORT
no short interest reported
The year, with the filings on it
Total return indexed to 100 over the last 12 months · every marker is a federal filing, placed at its date — hover any marker for the detail
TOTAL 12M RETURN +17.1%
+17.1%12M
-4%+10%+25%+39%2025-092025-102025-122026-032026-052026-072026-09 2026-06-11 · SCULLY WILLIAM P bought $1.0M2026-05-22 · SCULLY WILLIAM P bought $981.0K2026-06-02 · SCULLY WILLIAM P bought $471.5K2026-06-04 · SCULLY WILLIAM P bought $465.5K2026-08-20 · SCULLY WILLIAM P bought $439.4K2026-08-07 · SCULLY WILLIAM P bought $293.1K2026-09-02 · SCULLY WILLIAM P bought $255.7K2026-06-16 · SCULLY WILLIAM P bought $158.0K2026-07-29 · Isaacs Michael John sold $71.1K2026-07-29 · Kingston Anne Evans sold $64.9K2026-08-07 · SCULLY WILLIAM P bought $30.2K2026-07-29 · MICHAEL JOHN ISAACS filed to sell $71.1K2026-07-29 · ANNE KINGSTON filed to sell $64.9K
INSIDER BUYINSIDER SELLFORM 144
INDEXED RETURN, DIVIDEND-ADJUSTED — NOT A PRICE CHART · LARGE TRADES DRAWN FIRST WHEN A NAME FILES HEAVILY
Live price
Daily candles from TradingView, on their licence — no filings are marked on this one
WHY THIS NAME IS ON THE DESK
Insiders are net buyers of their own stock.
The record shows a net $4.0M bought by insiders over 180 days, $136.0K in planned Form 144 sales. Every figure is a federal filing, dated the day it became public.
Backtest this pattern Open the screener
Same sector, ranked by filing activity
Sector from the SEC's own SIC classification
UTHRCPIXMRNAREGNLLYALNYELFCITRMDGLDNAVRTXNUVL
Insider transactions
Form 4 purchases and sales (codes P and S) — grants, option exercises and preferred conversions excluded

Over the last 180 days, PROTHENA CORP PUBLIC LTD CO insiders bought a net $4.0M of stock across 290 Form 4 purchases and sales, with 1 insider(s) buying. Source: SEC Form 4 filings, as of 2026-09-05.

INSIDER
FILED
SHARES
VALUE
SCULLY WILLIAM P
—
BUY
2026-09-02
27,000.0
$255.7K
SCULLY WILLIAM P
—
BUY
2026-08-20
50,000.0
$439.4K
SCULLY WILLIAM P
—
BUY
2026-08-07
34,000.0
$293.1K
SCULLY WILLIAM P
—
BUY
2026-08-07
3,500.0
$30.2K
Isaacs Michael John
General Counsel & Company Sec.
SELL
2026-07-29
8,386.0
$71.1K
290 TRANSACTIONS ON RECORD

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Institutional holders
13F · holdings as of the latest quarter funds have reported

no 13F holders found for this ticker

SCHEDULE 13D/G
No 5%+ ownership filings
Nobody has crossed 5% with a filing obligation. Absence is a fact here, not missing data.
Planned sales · Form 144
Filed before the sale — intent, not a trade
MICHAEL JOHN ISAACS
FILED 2026-07-29
$71.1K
ANNE KINGSTON
FILED 2026-07-29
$64.9K
Executive pay vs shareholder return · Gene G. Kinney
DEF 14A pay-versus-performance disclosure · both the headline pay and the SEC's mark-to-market figure, beside the return the company delivered and the return of the peer group it chose itself
FY
CEO TOTAL
ACTUALLY PAID
OTHER NEOs AVG
TSR
PEER TSR
2025
$5.9M
$2.9M
$2.6M
-20%
+20%
2024
$7.2M
-$1.7M
$2.5M
+15%
-9%
2023
$7.0M
-$3.2M
$2.6M
+203%
-8%
2022
$6.7M
$7.4M
$2.7M
+402%
-11%
2021
$4.9M
$41.1M
$2.9M
+311%
-1%
TAGGED BY THE COMPANY UNDER SEC ITEM 402(v) · RETURN IS CUMULATIVE FROM THE START OF THE DISCLOSURE PERIOD · GREEN WHERE THE COMPANY BEAT ITS OWN PEER GROUP
Fundamentals
Annual figures from XBRL filings · pick a past date to see them exactly as the market knew them then — restatements and all
2025-122024-122023-122022-12
REVENUE$9.7M$135.2M$91.4M$53.9M
OPERATING INCOME$-214.6M$-154.6M$-191.0M$-131.6M
NET INCOME$-244.1M$-122.3M$-147.0M$-116.9M
EPS (DILUTED)-4.53-2.27-2.76-2.47
OPERATING CASH FLOW$-163.6M$-150.1M$-133.9M$-108.8M
CASH$307.5M$471.4M$618.8M$710.4M
SEC XBRL · FISCAL-YEAR PERIODS · AS KNOWN ON 2026-09-05 · NOBODY ELSE SHOWS FUNDAMENTALS AS OF A PAST DATE
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Public filings, honestly analyzed. Official US government sources in one desk — every figure carries the date it was filed, and the methodology is published, backtest included.

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© 2026 WAVEMAN · SOURCE: SEC EDGAR & OFFICIAL GOVERNMENT DATA · NOT INVESTMENT ADVICE · CHART BY TRADINGVIEW · UPDATED 2026-09-05 ALL SYSTEMS LIVE FOR MACHINES →