Stock Analysis
Data Source: SEC EDGAR 13F
Updated Hourly

PROTHENA CORP PLC (PRTA)

188 + 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
↓ -9
Streak
1Q ▼
Buyers last Q
49%

Smart Money Signals — PRTA

Based on 175 hedge funds · latest filing: 2025 Q4 · updated quarterly

📉

Selling streak — 1 quarter in a row

last 6Q
For 1 consecutive quarter, more hedge funds reduced or closed their PRTA positions than added to them. Sustained institutional selling is a meaningful warning sign — these are professionals with deep research teams collectively deciding to exit.
🏔️

At the ownership peak (95% of max)

95% of all-time peak
175 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.
📶

Steady growth — +7% more funds vs a year ago

fund count last 6Q
+12 new funds entered over the past year (+7% YoY). Gradual, steady growth in institutional ownership is generally a healthy signal — not a speculative rush, but consistent conviction.
🟠

More sellers than buyers — 49% buying

89 buying92 selling
Last quarter: 92 funds reduced or exited vs 89 that bought or added. When more than half of active funds are selling, it's a caution flag — especially if the stock price hasn't moved down yet.
⚠️

Fewer new buyers each quarter (-11 vs last Q)

new funds entering per quarter
Funds opening this position for the first time: 20 → 54 → 34 → 23. Each quarter fewer new institutions are entering. This usually means most funds that wanted in are already in — the stock is well-known but the pool of potential new buyers is shrinking.
🔒

62% of holders stayed for 2+ years

■ 62% conviction (2yr+) ■ 17% medium ■ 21% new
109 out of 175 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.
📊

Peak discovery — momentum slowing

34 → 20 → 54 → 34 → 23 new funds/Q
New funds entering each quarter: 20 → 54 → 34 → 23. PRTA is well-known in the hedge fund world, but fresh entries are gradually declining. The explosive phase of institutional discovery is likely behind us.
🏛️

Deep conviction — 70% of holders stayed 2+ years

■ 70% veterans ■ 8% 1-2yr ■ 22% new
Of 188 current holders: 132 (70%) have held for over 2 years without selling. These are not momentum buyers — they have lived through drawdowns and stayed. A large veteran base acts as a stabilizing force during selloffs.
✅

Strong quality — 39% AUM from major funds

39% from top-100 AUM funds
30 of 175 holders rank in the top 100 by AUM, accounting for 39% of total institutional value held. A meaningful share of the ownership value comes from the most well-resourced institutions.
3.5
out of 10
Low Exit Risk
Exit risk score 3.5/10 — 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.

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

-- --
Smart Money Signal ?
Limited Smart Money Interest

No strong consensus or elite conviction detected among institutional holders.

31 top-rated funds 1 high-conviction
Consensus
6.5
/ 10
breadth
×
Elite
1.6
/ 10
conviction
Hedge Fund Positioning: PRTA
2026 Q1 Stats Unlock in 19 days 188 + Investors

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

Metric All 13F Filers (2025 Q4) Prior (2025 Q3) Change
Funds Holding 188 195 -3.59%
13F Shares 49M 44M 9.32%
Total Value $462M $432M 7.01%
New Positions 23 35 -12
Increased Positions 78 78 -
Closed Positions 33 33 -
Reduced Positions 80 72 +8
Total Calls 7 6 16.67%
Total Puts 7 7 -
PUT/CALL Ratio 1.0 1.17 Neutral

Statistics: PRTA

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Beta (5Y Monthly) --
Short Ratio (Days to Cover) --
Short % of Float --

Financial Highlights

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Institutional Holders (2026 Q1)

188 + investors

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

Top 25 institutional holders of PRTA — 2025 Q4 · Source: SEC Form 13F
# Investor % of Portfolio Shares Mkt Value
1 Penbrook Management LLC 2.00% 271,720 $2.6M
2 Focused Wealth Management, Inc 0.21% 207,403 $2.0M
3 CHICAGO TRUST Co NA 0.02% 15,057 $146K
4 Y-Intercept (Hong Kong) Ltd 0.02% 100,805 $980K
5 MOGY JOEL R INVESTMENT COUNSEL INC 0.01% 20,750 $202K
6 Inscription Capital, LLC 0.01% 10,480 $102K
7 PROFUND ADVISORS LLC 0.01% 24,005 $233K
8 PINNACLE ASSOCIATES LTD 0.01% 60,662 $590K
9 China Universal Asset Management Co., Ltd. 0.01% 9,553 $93K
10 Brooklyn Investment Group 0.00% 14,993 $146K
11 CARY STREET PARTNERS FINANCIAL LLC 0.00% 12,500 $122K
12 Versant Capital Management, Inc 0.00% 2,192 $21K
13 Nuveen, LLC 0.00% 759,368 $7.4M
14 Assenagon Asset Management S.A. 0.00% 76,769 $746K
15 Police & Firemen's Retirement System of New Jersey 0.00% 12,453 $121K
16 GAMMA Investing LLC 0.00% 2,155 $21K
17 SIGNATUREFD, LLC 0.00% 4,727 $46K
18 STRS OHIO 0.00% 14,700 $143K
19 HSBC HOLDINGS PLC 0.00% 65,070 $632K
20 True Wealth Design, LLC 0.00% 103 $1K
21 Farther Finance Advisors, LLC 0.00% 2,734 $27K
22 Sterling Capital Management LLC 0.00% 1,348 $13K
23 GF FUND MANAGEMENT CO. LTD. 0.00% 1,199 $12K
24 COMMONWEALTH EQUITY SERVICES, LLC 0.00% 11,930 $116K
25 SG Americas Securities, LLC 0.00% 13,522 —
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?

Selling streak — 1 quarter in a row: For 1 consecutive quarter, more hedge funds reduced or closed their PRTA positions than added to them. Sustained institutional selling is a meaningful warning sign — these are professionals with deep research teams collectively deciding to exit.

What is the institutional breadth score for PRTA?

More sellers than buyers — 49% buying: Last quarter: 92 funds reduced or exited vs 89 that bought or added. When more than half of active funds are selling, it's a caution flag — especially if the stock price hasn't moved down yet.

What is the fund quality score for PRTA holders?

Strong quality — 39% AUM from major funds: 30 of 175 holders rank in the top 100 by AUM, accounting for 39% of total institutional value held. A meaningful share of the ownership value comes from the most well-resourced institutions.

How long have hedge funds held PRTA?

62% of holders stayed for 2+ years: 109 out of 175 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.