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AFTER HRS · 18:10 ET
Market ClerkRecap
Wed Oct 21 · after hours2 signals today106 insider buys this week · $305.5MCIRO short report next: Oct 31The week ahead

PRTA

PROTHENA CORP PUBLIC LTD CO
NASDAQ · HEALTH CARE · PHARMACEUTICAL PREPARATIONS
8.50
+0.02 +0.24%
USD · Oct 20, 07:41 p.m. ET

A free account adds a watchlist, alerts when insiders, Congress or short sellers move on your tickers, and a morning brief. Sign up

MKT CAP $436.4MP/E —DIV YIELD —FCF YIELD —REV TTM $54.5M +427.3%NET INCOME −$44MNET CASH —52W 7.91 – 11.51NEXT EARNINGS Nov 5 EST.SEC XBRL · TTM TO Invalid Date

One year, everything drawn on

252 SESSIONS · DAILY CLOSES
12109.017.62Oct 14 · 10% owner buy $85KOct 13 · 10% owner buy $835KOct 8 · 10% owner buy $771KOct 7 · 10% owner buy $1.1MOct 2 · 10% owner buy $857KSep 29 · 10% owner buy $1.4MSep 28 · 10% owner buy $890KSep 18 · 10% owner buy $843KSep 2 · 10% owner buy $256KAug 20 · 10% owner buy $439KAug 6 · 10-Q filed (Q2 2026)Aug 6 · 10-Q filed (Q1 2026)Feb 27 · 10-K filed (FY 2025)Feb 27 · 10-K filed (Q4 2025)Nov 6 · 10-Q filed (Q3 2025)Aug 6 · 10-Q filed (Q2 2025)Aug 6 · 10-Q filed (Q1 2025)Feb 27 · 10-K filed (FY 2024)Feb 27 · 10-K filed (Q4 2024)Nov 6 · 10-Q filed (Q3 2024)Nov 6 · 10-Q filed (Q2 2024)Nov 6 · 10-Q filed (Q1 2024)Feb 27 · 10-K filed (FY 2023)Feb 27 · 10-K filed (Q4 2023)OCT 2025JAN 2026APRJUL
Insider buyInsider sellCongress buy, above the lineCongress sell, below10-K / 10-Q filedHOVER A MARKER FOR THE FILING
THE WORK ORDER · 2026-10-21
Insiders (90d): $7.4M net buying · 1 distinct buyer
Shorts (latest report): 8.5M short · −49K last period
Every line of the math
66PASS

Congress is trading it

No STOCK Act disclosure names PRTA.

Insider activity

ALL 10
DateInsiderTypeValue
Oct 1410% ownerBuy$85K
Oct 1310% ownerBuy$835K
Oct 810% ownerBuy$771K
Oct 710% ownerBuy$1.1M
Oct 210% ownerBuy$857K
Sep 2910% ownerBuy$1.4M
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