Stock Analysis
Data Source: SEC EDGAR 13F
Updated Hourly

Prothena Corp plc (PRTA)

186 + Investors. Track Smart Money conviction in PRTA. See who's accumulating, reducing, or initiating positions.

Current Price
-- USD
Analyst Target
-- (0 analysts)
Upside
0.00%
Net Flow Q/Q
↑ +3
Streak
2Q ▲
Buyers last Q
51%

Smart Money Signals — PRTA

Based on 190 hedge funds · latest filing: 2026 Q2 · updated quarterly

📈

Buying streak — 2 quarters in a row

last 6Q
For 2 consecutive quarters, more hedge funds added PRTA than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.
🏔️

At the ownership peak (100% of max)

100% of all-time peak
190 hedge funds hold PRTA right now — the highest count in 3.0 years. When ownership is this concentrated, any bad news can trigger a chain reaction: one big fund sells, others follow. This is a classic 'crowded trade' — high popularity doesn't equal safety.
〰️

Stable — ownership unchanged year-over-year

fund count last 6Q
The number of hedge funds holding PRTA is almost the same as a year ago (+0 funds, +0% change). No significant rush to buy or sell — institutional backing is holding steady.
🟡

Slight buying edge — 51% buying

90 buying86 selling
Last quarter: 90 funds bought or added vs 86 that reduced or exited. It's nearly a 50/50 split — some institutions are convinced, others are taking profits. This mixed picture is normal near price highs.
➡️

Steady new buyers — ~31 new funds per quarter

new funds entering per quarter
Funds opening this position for the first time: 34 → 24 → 31 → 31. A stable flow of new institutional buyers suggests ongoing interest without signs of either acceleration or slowdown.
🔒

54% of holders stayed for 2+ years

■ 54% conviction (2yr+) ■ 29% medium ■ 17% new
103 out of 190 hedge funds have held PRTA for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.
➡️

Steady discovery — ~31 new funds/quarter

54 → 34 → 24 → 31 → 31 new funds/Q
New funds entering each quarter: 34 → 24 → 31 → 31. Consistent flow of new institutional buyers without clear acceleration or slowdown.
🏛️

Veteran-anchored — 62% veterans vs 25% newcomers

■ 62% veterans ■ 13% 1-2yr ■ 25% new
Entry-cohort mix of 194 holders: 120 (62%) are 2+ year veterans, 25 entered 1–2 years ago, and 49 (25%) joined within the past year. A veteran-weighted cap table skews toward institutional memory over fresh momentum.
🏆

Elite ownership — 55% AUM from top-100 funds

55% from top-100 AUM funds
42 of 187 holders are among the 100 largest funds by AUM, controlling 55% of total institutional value in PRTA. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.
3.4
out of 10
Low Exit Risk
Exit risk score 3.4/10 — low institutional crowding. Ownership is below peak levels, holder base is relatively sticky, and buying momentum is positive.

Methodology note: these Smart Money cards use consecutive 13F disclosure snapshots, not trade-by-trade execution data. "Buying", "selling", "new holders", and "trimmed" refer to quarter-over-quarter changes in reported holders, aggregate shares, or disclosed position values between filings. They are useful for ownership regime analysis and crowding, but they do not imply exact trade timing on the filing date.

Institutional Sentiment Summary — PRTA

In 2026 Q2, 90 hedge funds were net buyers of PRTA (31 opened a new position, 59 added to an existing one), while 86 reduced or exited (58 trimmed, 28 sold completely) — a 51% buyer ratio, indicating a slight buying edge. Net buying has persisted for two consecutive quarters, a positive momentum signal. 55% of total institutional value in PRTA is held by top-100 AUM funds, reflecting elite-tier ownership quality. Net fund flow last quarter: +3 funds (more new holders than closures). Total institutional holders: 190.

Hedge Fund Ownership: PRTA

How many hedge funds hold PRTA — quarterly history vs. share price
Quarterly hedge fund ownership of PRTA vs. share price

Market Analysis: PRTA

Analyst Price Targets

Avg. Price Target
--

Analyst Recommendations

Stock Performance

Real-time

Company Profile: PRTA

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Institutional ownership data sourced from SEC EDGAR Form 13F-HR filings.

Loading signal freshness…
Smart Money Signal ?
Limited Smart Money Interest

No strong consensus or elite conviction detected among institutional holders.

11 top-rated funds 1 high-conviction
Consensus
4.7
/ 10
breadth
×
Elite
1.3
/ 10
conviction
Hedge Fund Positioning: PRTA
186 + Investors

Track Smart Money conviction in PRTA. See who's accumulating, reducing, or initiating positions.

Metric All 13F Filers (2026 Q2) Prior (2026 Q1) Change
Funds Holding 186 187 -0.53%
13F Shares 48M 48M 0.66%
Total Value $454M $452M 0.54%
New Positions 31 31 -
Increased Positions 57 67 -10
Closed Positions 29 25 +4
Reduced Positions 56 51 +5
Total Calls 4 5 -20.0%
Total Puts 3 3 -
PUT/CALL Ratio 0.75 0.6 Neutral

Statistics: PRTA

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Institutional Holders (2026 Q2)

186 + investors

Explore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in PRTA. Verified SEC 13F-HR filings.

QUARTER:
Top 25 PRTA holders by conviction (% of portfolio weight) — 2026 Q2 · Source: SEC Form 13F
# Investor % of Portfolio Shares Mkt Value
1 Rangeley Capital, LLC 3.73% 417,270 $4.1M
2 Birchview Capital, LP 2.06% 449,019 $4.4M
3 Penbrook Management LLC 1.70% 271,720 $2.7M
4 Palo Alto Investors LP 1.55% 1,143,155 $11.2M
5 Monimus Capital Management, LP 0.75% 329,052 $3.2M
6 ADAR1 Capital Management, LLC 0.70% 1,554,535 $15.2M
7 Rubric Capital Management LP 0.45% 5,000,000 $49.0M
8 nVerses Capital, LLC 0.20% 13,246 $130K
9 Diadema Partners LP 0.18% 149,482 $1.5M
10 Focused Wealth Management, Inc 0.18% 207,445 $2.0M
11 Duncan Williams Asset Management, LLC 0.16% 70,281 $688K
12 DCF Advisers, LLC 0.13% 73,247 $717K
13 Foundation Wealth Management, LLC 0.11% 19,236 $188K
14 Persistent Asset Partners Ltd 0.11% 38,100 $373K
15 Purkiss Capital Advisors LLC 0.09% 25,086 $246K
16 Virtus Investment Advisers, LLC 0.09% 39,660 $388K
17 Seven Fleet Capital Management LP 0.07% 43,300 $424K
18 Cornerstone Select Advisors, LLC 0.04% 10,000 $98K
19 Campbell & CO Investment Adviser LLC 0.04% 68,345 $669K
20 Jacobs Levy Equity Management, Inc 0.03% 965,988 $9.5M
21 Hennion & Walsh Asset Management, Inc. 0.03% 90,795 $889K
22 Quinn Opportunity Partners LLC 0.02% 50,000 $490K
23 CHICAGO TRUST Co NA 0.02% 15,057 $147K
24 Martingale Asset Management L P 0.02% 78,800 $771K
25 Headlands Technologies LLC 0.02% 15,077 $148K
Investor Ownership
History 		% of Portfolio Prev % Rank Conviction Avg Buy Price 13F Score™ 3Y / 7Y Sell Timing Shares Mkt Value Change Change % Source Quarter Filed

Frequently Asked Questions — Prothena Corp plc (PRTA)

What does the Smart Money Trend signal show for PRTA?

Buying streak — 2 quarters in a row: For 2 consecutive quarters, more hedge funds added PRTA than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.

What is the institutional breadth score for PRTA?

Slight buying edge — 51% buying: Last quarter: 90 funds bought or added vs 86 that reduced or exited. It's nearly a 50/50 split — some institutions are convinced, others are taking profits. This mixed picture is normal near price highs.

What is the fund quality score for PRTA holders?

Elite ownership — 55% AUM from top-100 funds: 42 of 187 holders are among the 100 largest funds by AUM, controlling 55% of total institutional value in PRTA. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.

How long have hedge funds held PRTA?

54% of holders stayed for 2+ years: 103 out of 190 hedge funds have held PRTA for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.

Where does this institutional ownership data come from?

All holdings data is sourced from SEC Form 13F filings, which institutional investment managers with over $100 million in assets are required to submit quarterly. Data is parsed directly from SEC EDGAR.

Disclaimer: The information on this page is for informational purposes only and does not constitute investment advice, a recommendation, or an offer to buy or sell any security. Institutional holdings data is sourced from SEC Form 13F filings and reflects positions as of the filing date. Past performance of any fund or portfolio is not indicative of future results. 13Foresight is not a registered investment adviser. Always conduct your own due diligence before making investment decisions.

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