프로테나 코퍼레이션 plc
DE ˙ DB ˙ IE00B91XRN20
€7.74 ↑0.39 (5.30%)
2026-06-04
주가
SecurityDE:0PT / Prothena Corporation plc
InstitutionStrs Ohio
Latest Disclosed Ownership14,700 shares
Latest Disclosed Value $ 142,884
Strs Ohio reports 16.48% decrease in ownership of 0PT / Prothena Corporation plc

On April 24, 2026 - Strs Ohio filed a 13F-HR form disclosing ownership of 14,700 shares of Prothena Corporation plc (DE:0PT) valued at $120,540 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 17,600 shares of Prothena Corporation plc. This represents a change in shares of -16.48% during the quarter. The current value of the position is $113,837 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-04-24 2026-03-31 13F PROTHENA CORP COM_STK G72800108 14,700 -2,900 -16.48 143 -15.48 0.0006
2026-02-02 2025-12-31 13F PROTHENA CORP COM_STK G72800108 17,600 -11,200 -38.89 168 -40.21 0.0006
2025-10-30 2025-09-30 13F PROTHENA CORP COM_STK G72800108 28,800 12,400 75.61 281 183.84 0.0010
2025-08-04 2025-06-30 13F PROTHENA CORP COM_STK G72800108 16,400 16,400 100 0.0004
2025-05-28 2025-03-31 13F PROTHENA CORP COM_STK G72800108 0 -3,600 -100.00 0 -100.00
2025-05-28 2024-12-31 13F PROTHENA CORP COM_STK G72800108 3,600 -7,600 -67.86 50 -73.80 0.0002
2024-11-01 2024-09-30 13F PROTHENA CORP COM_STK G72800108 11,200 0 0.00 187 -19.05 0.0007
2024-08-05 2024-06-30 13F PROTHENA CORP COM_STK G72800108 11,200 1,100 10.89 231 0.0009
2024-05-13 2024-03-31 13F PROTHENA CORP COM_STK G72800108 10,100 -600 -5.61 0 0.0010
2024-01-30 2023-12-31 13F PROTHENA CORP ICOM G72800108 10,700 3,800 55.07 0 0.0016
2023-10-26 2023-09-30 13F/A-1 PROTHENA CORP ICOM G72800108 6,900 -6,100 -46.92 0 0.0015
2023-10-26 2023-09-30 13F PROTHENA CORP ICOM G72800108 6,900 -6,100 0 0.0015
2023-07-31 2023-06-30 13F PROTHENA CORP ICOM G72800108 13,000 500 4.00 1 0.0037
2023-08-02 2023-03-31 13F/A-2 PROTHENA CORP ICOM G72800108 12,500 0 0.00 1 0.0026
2023-08-02 2023-03-31 13F/A-1 PROTHENA CORP ICOM G72800108 12,500 1
2023-04-27 2023-03-31 13F PROTHENA CORP ICOM G72800108 12,500 0 1 0.0031
2023-01-26 2022-12-31 13F PROTHENA CORP ICOM G72800108 12,500 -7,100 -36.22 1 -100.00 0.0034
2022-10-27 2022-09-30 13F PROTHENA CORP ICOM G72800108 19,600 0 0.00 1,188 123.31 0.0057
2022-07-25 2022-06-30 13F PROTHENA CORP ICOM G72800108 19,600 3,200 19.51 532 -11.19 0.0024
2022-04-21 2022-03-31 13F PROTHENA CORP ICOM G72800108 16,400 0 0.00 599 -26.05 0.0022
2022-01-24 2021-12-31 13F PROTHENA CORP ICOM G72800108 16,400 2,700 19.71 810 -16.92 0.0028
2021-10-22 2021-09-30 13F PROTHENA CORP ICOM G72800108 13,700 12,600 1,145.45 975 1,641.07 0.0037
2021-07-26 2021-06-30 13F PROTHENA CORP ICOM G72800108 1,100 1,100 56 0.0002
2018-01-23 2017-12-31 13F PROTHENA CORP ICOM G72800108 0 -2,200 -100.00 0 -100.00
2017-10-23 2017-09-30 13F PROTHENA CORP ICOM G72800108 2,200 900 69.23 142 102.86 0.0006
2017-07-26 2017-06-30 13F PROTHENA CORP ICOM G72800108 1,300 1,300 -40.91 70 -50.70 0.0003
2017-01-24 2016-12-31 13F PROTHENA CORP ICOM G72800108 0 -2,200 -100.00 0 -100.00
2016-10-27 2016-09-30 13F PROTHENA CORP ICOM G72800108 2,200 800 57.14 131 129.82 0.0006
2016-04-25 2016-03-31 13F/A-1 PROTHENA CORP ICOM G72800108 1,400 -700 -33.33 57 -60.14 0.0003
2016-01-28 2015-12-31 13F PROTHENA CORP ICOM G72800108 2,100 551 35.57 143 104.29 0.0006
2015-10-21 2015-09-30 13F PROTHENA CORP ICOM G72800108 1,549 0 0.00 70 -13.58 0.0003
2015-08-04 2015-06-30 13F PROTHENA CORP ICOM G72800108 1,549 0 0.00 81 37.29 0.0004
2015-04-27 2015-03-31 13F/A-1 PROTHENA CORP ICOM G72800108 1,549 0 0.00 59 84.38 0.0003
2015-04-21 2015-03-31 13F PROTHENA CORP ICOM G72800108 1,549 59
2015-01-23 2014-12-31 13F PROTHENA CORP ICOM G72800108 1,549 0 0.00 32 -5.88 0.0001
2014-10-29 2014-09-30 13F/A-1 PROTHENA CORP ICOM G72800108 1,549 -21,300 -93.22 34 -93.40 0.0002
2014-10-20 2014-09-30 13F PROTHENA CORP ICOM G72800108 1,549 34
2014-07-24 2014-06-30 13F PROTHENA CORP ICOM G72800108 22,849 1,500 7.03 515 -37.04 0.0023
2014-04-28 2014-03-31 13F PROTHENA CORP ICOM G72800108 21,349 -600 -2.73 818 40.55 0.0037
2014-01-30 2013-12-31 13F PROTHENA CORP ICOM G72800108 21,949 19,250 713.23 582 958.18 0.0026
2013-10-24 2013-09-30 13F PROTHENA CORP ICOM G72800108 2,699 -4,350 -61.71 55 -39.56 0.0002
2013-08-12 2013-06-30 13F PROTHENA CORP ICOM G72800108 7,049 7,049 91 0.0004
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.