Institutional Ownership
Prothena Corp PLC
CUSIP G72800108SHSQ1 2026
Institutional Holders
179
13F filers
Shares Held
44.77M
Aggregate institutional
Institutional Value
$417.79M
Q1 2026
Net New Holders
+2
24 new · 22 closed
Institutional Ownership Trend
Aggregate 13F value by quarter
Multi-quarter trend — upgrade to see history
UpgradePosition Activity
Q1 2026
New positions24
Increased68
Decreased49
Sold out22
Institutional Holders
179 funds hold this security · Q1 2026
| # | Fund | Shares | Value | Δ Shares | Activity |
|---|---|---|---|---|---|
| 1 | Fmr LLC | 7.55M | $73.40M | 0 | Held |
| 2 | Rubric Capital Management LP | 5.00M | $48.60M | +1.32M | Added |
| 3 | Blackrock, Inc. | 4.64M | $45.14M | +536.7K | Added |
| 4 | State Street Corp | 1.94M | $18.84M | −329.3K | Reduced |
| 5 | D. E. Shaw & Co., Inc. | 1.76M | $17.14M | +82.0K | Added |
| 6 | Adar1 Capital Management, LLC | 1.58M | $15.37M | +123.7K | Added |
| 7 | Morgan Stanley | 1.23M | $11.96M | −16.3K | Reduced |
| 8 | Palo Alto Investors LP | 1.21M | $11.75M | −111.9K | Reduced |
| 9 | Two Sigma Investments, LP | 1.21M | $11.72M | +535.8K | Added |
| 10 | Geode Capital Management, LLC | 1.10M | $10.68M | +35.1K | Added |
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