PRTA · NASDAQ · Pharmaceutical Preparations
Pharmaceutical Preparations company based in Dublin 2, L2.
In the last 90 days, insiders of Prothena Corp Public Ltd reported 3 open-market purchases worth about $3.15M and 0 open-market sales. Every figure links to its official SEC, House, Senate or USAspending record.
Last closeLast close, Oct 6, 2026
$8.02
Last 12 months
Not enough history
Market value
Not available
Bets against the stock: 8.54M shares sold short, +0.6% vs the previous count, 26.5 days of normal trading to buy them back. FINRA, as of Sep 15, 2026.
Revenue
$1.01M
−77.1% vs the same quarter a year earlier
Free cash flow, last 12 months
—
Cash from operations minus capital spending
Net debt
—
Debt —, cash $288M, at Jun 30, 2026
Net income, last 12 months
−$44M
From the company's own quarterly and annual reports to the SEC. Free cash flow (cash from operations minus capital spending), net debt (debt minus cash) and 12-month totals are calculated by OQRO. Production rates, deliveries, approvals and guidance are in its results announcement of Aug 6, 2026.
Insiders buying, last 90 days
1 insider
$3.15M bought in total
Insiders selling, last 90 days
None
No open-market sales reported
New federal contracts, 12 months
None
Nothing found for this company
Traded Oct 2 · filed 4 days later
Since filing −4.1% · S&P 500 +1.2% · to Oct 6
A major shareholder of Prothena Corp Public paid $857K out of pocket for Prothena Corp Public shares. The Prothena Corp Public shares held grew by 47%.
Traded Sep 28 – Sep 29, 2026 · largest single transaction ~$1.41M
Sep 29, 2026~$1.41M · 162K sh @ $8.68
DetailsOfficial recordSep 28, 2026~$890K · 104K sh @ $8.60
DetailsOfficial recordPrices are daily closes from Polygon.io. Company figures come from its own SEC filings. Past moves are not a forecast. OQRO reports what was filed and never tells you what to buy or sell.