PR
PRTA
PROTHENA CORP PUBLIC LTD CO
$9.14
-2.25%
$489.5M
No data for this timeframe.
Vol
Market Cap$489.5M
Cap SizeSmall Cap
Analyst ConsensusBuy (67%)
SEC Reports4
Recent Activity
May 15, 2026
Insider
COLLIER RICHARD T sold 27,000 shares
Director @ $0.00 ($0.00)
May 15, 2026
Insider
Dunn William H. Jr. sold 27,000 shares
Director @ $0.00 ($0.00)
May 15, 2026
Insider
Ekman Lars sold 27,000 shares
Director @ $0.00 ($0.00)
May 14, 2026
SEC
William P. Scully filed a Form 3 initial statement of beneficial ownership, disclosing 736,000 ordinary shares held dire
3 — Impact 2/10
May 13, 2026
earnings_calendar
PRTA Q1 2026 Earnings Scheduled — 2026-05-13
May 7, 2026
SEC
Prothena reported a transformative Q1 2026: net income of $32.7M (diluted EPS $0.60) vs. consensus loss of -$0.31, drive
8-K — Impact 8/10
Mar 27, 2026
SEC
Prothena Corp PLC is holding its 2026 Annual General Meeting to elect two directors and vote on non-binding resolutions
DEFA14A — Impact 3/10
Price Targets
$21.40
+134.1% upside
Strong Buy
Current $9.14
Low $8.00
Median $20.00
High $36.00
5 analysts
$8.00
$36.00
Analyst Ratings
2Strong Buy
6Buy
3Hold
1Sell
0Strong Sell
Recent Analyst Actions
| Date | Firm | Action | Rating |
|---|---|---|---|
| May 8, 2026 | Citizens | MAINTAIN | Market Outperform → Market Outperform |
| Feb 20, 2026 | RBC Capital | MAINTAIN | Sector Perform → Sector Perform |
| Dec 1, 2025 | Citizens | MAINTAIN | Market Outperform → Market Outperform |
Earnings Estimates
| Period | EPS Est. | Range | Growth | # |
|---|---|---|---|---|
| Current Q | $0.38 ▼ -71.3% | $-0.38 — $1.14 | 122% YoY | 2 |
| Next Q | $-0.30 ▼ -13.2% | $-0.37 — $-0.23 | 55% YoY | 2 |
| Current FY | $0.05 ▼ -92.2% | $-0.55 — $0.65 | 101% YoY | 2 |
| Next FY | $-1.31 ▼ -26.0% | $-1.31 — $-1.31 | -2720% YoY | 1 |
Latest Reports
Recent Insider Trades
| Date | Insider | Type | Value |
|---|---|---|---|
| May 15, 2026 | COLLIER RICHARD | A | $0.00 |
| May 15, 2026 | Dunn William | A | $0.00 |
| May 15, 2026 | Ekman Lars | A | $0.00 |
| May 15, 2026 | Cooke Shane | A | $0.00 |
| May 15, 2026 | Selkoe Dennis | A | $0.00 |
No institutional holding data available yet. Data is sourced from 13F filings which are filed quarterly.
14 unique insiders with 0 transactions. Net insider value: $0.00 ($0.00 bought, $0.00 sold).
Insider Transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 15, 2026 | COLLIER RICHARD T | Director | A | 27,000 | $0.00 | $0.00 |
| May 15, 2026 | Dunn William H. Jr. | Director | A | 27,000 | $0.00 | $0.00 |
| May 15, 2026 | Ekman Lars | Director | A | 27,000 | $0.00 | $0.00 |
| May 15, 2026 | Cooke Shane | Director | A | 27,000 | $0.00 | $0.00 |
| May 15, 2026 | Selkoe Dennis J. | Director | A | 27,000 | $0.00 | $0.00 |
| May 15, 2026 | WELCH DANIEL G | Director | A | 27,000 | $0.00 | $0.00 |
| Apr 10, 2026 | Kingston Anne Evans | Chief Strategy Officer | A | 100,000 | $0.00 | $0.00 |
| Mar 3, 2026 | Swanson Chad J. | Chief Development Officer | A | 190,000 | $0.00 | $0.00 |
| Mar 3, 2026 | Malecek Michael J | Chief Legal Officer | A | 190,000 | $0.00 | $0.00 |
| Mar 3, 2026 | Zago Wagner M. | Chief Scientific Officer | A | 190,000 | $0.00 | $0.00 |
| Mar 3, 2026 | Walker Karin L | Chief Accounting Officer | A | 150,000 | $0.00 | $0.00 |
| Mar 3, 2026 | Smith Brandon S. | Chief Operating Officer | A | 190,000 | $0.00 | $0.00 |
| Mar 3, 2026 | Nguyen Tran | Chief Strategy Officer and CFO | A | 230,000 | $0.00 | $0.00 |
| Mar 3, 2026 | Kinney Gene G. | President and CEO | A | 520,000 | $0.00 | $0.00 |
4 SEC filing reports analyzed. Sentiment: 1 bullish, 0 bearish, 0 mixed, 3 neutral. Avg impact: 4.0/10.
NEUTRAL
3
2/10
William P. Scully filed a Form 3 initial statement of beneficial ownership, disclosing 736,000 ordin
May 14, 2026
BULLISH
8-K
8/10
Prothena reported a transformative Q1 2026: net income of $32.7M (diluted EPS $0.60) vs. consensus l
May 7, 2026
NEUTRAL
DEFA14A
3/10
Prothena Corp PLC is holding its 2026 Annual General Meeting to elect two directors and vote on non-
Mar 27, 2026
NEUTRAL
EFFECT
3/10
Analysis based on filing metadata only — document content was unavailable. This is an EFFECT filing,
Mar 3, 2026
No press releases analyzed yet. Press releases are collected from GlobeNewsWire and analyzed by the LLM pipeline.
Current analyst consensus: Buy (67% buy). Based on 12 analysts: 2 strong buy, 6 buy, 3 hold, 1 sell, 0 strong sell.
Analyst Price Targets
$21.40 mean target
+134.1% upside
Strong Buy (2.50)
$8.00 Low
$36.00 High
| Metric | Value |
|---|---|
| Current Price | $9.14 |
| Target Low | $8.00 |
| Target Mean | $21.40 |
| Target Median | $20.00 |
| Target High | $36.00 |
| # Analysts | 5 |
| Recommendation | Strong Buy (2.50) |
Earnings Estimates & Revisions
| Period | EPS Avg | EPS Low | EPS High | EPS Growth | 30d Rev. | Up/Down | Rev. Avg | Rev. Growth | Analysts |
|---|---|---|---|---|---|---|---|---|---|
| Current Q 2026-06-30 |
$0.38 | $-0.38 | $1.14 | 122.0% | -71.3% | 1↑ 0↓ | $0.0B | -90.4% | 2 |
| Next Q 2026-09-30 |
$-0.30 | $-0.37 | $-0.23 | 55.2% | -13.2% | 1↑ 0↓ | $0.0B | 297.2% | 2 |
| Current FY 2026-12-31 |
$0.05 | $-0.55 | $0.65 | 101.3% | -92.2% | 2↑ 0↓ | $0.1B | 760.4% | 2 |
| Next FY 2027-12-31 |
$-1.31 | $-1.31 | $-1.31 | -2720.0% | -26.0% | 1↑ 0↓ | $0.0B | -73.6% | 1 |
Current Quarter EPS Revision History
| Timepoint | EPS Estimate | Change |
|---|---|---|
| Current | $0.380 | |
| 7d ago | $1.325 | -0.945 |
| 30d ago | $1.325 | -0.945 |
| 60d ago | $1.325 | -0.945 |
| 90d ago | $1.275 | -0.895 |
2 analyst firms have rated this stock: 0 upgrades, 0 downgrades, 0 initiations.
Individual Analyst Actions
| Date | Analyst Firm | Action | Previous Rating | New Rating |
|---|---|---|---|---|
| May 8, 2026 | Citizens | MAINTAIN | Market Outperform | Market Outperform |
| Feb 20, 2026 | RBC Capital | MAINTAIN | Sector Perform | Sector Perform |
| Dec 1, 2025 | Citizens | MAINTAIN | Market Outperform | Market Outperform |
Monthly Consensus History
| Period | Strong Buy | Buy | Hold | Sell | Strong Sell | Buy % | Distribution |
|---|---|---|---|---|---|---|---|
| May 1, 2026 | 2 | 6 | 3 | 1 | 0 | 67% | |
| Apr 1, 2026 | 2 | 6 | 3 | 1 | 0 | 67% | |
| Mar 1, 2026 | 2 | 7 | 3 | 1 | 0 | 69% | |
| Feb 1, 2026 | 2 | 7 | 3 | 1 | 0 | 69% | |
| Jan 1, 2026 | 2 | 7 | 3 | 1 | 0 | 69% |
Strong BuyBuyHoldSellStrong Sell
No congressional trading data available for this ticker. Data is sourced from Senate and House financial disclosure filings.
No Reddit sentiment data available yet. Sentiment is analyzed from Reddit investment communities on a rolling basis.
May 13, 2026
earnings_calendar
PRTA Q1 2026 Earnings Scheduled — 2026-05-13
May 7, 2026
earnings_calendar
PRTA Q1 2026 Earnings Scheduled — 2026-05-07