Prothena Corporation plc
DE ˙ DB ˙ IE00B91XRN20
7,74 € ↑0,39 (5,30%)
2026-06-04
DELAT PRIS
SecurityDE:0PT / Prothena Corporation plc
InstitutionInvesco Ltd.
Latest Disclosed Ownership49,808 shares
Latest Disclosed Value $ 484,134
Invesco Ltd. reports 87.18% increase in ownership of 0PT / Prothena Corporation plc

On May 12, 2026 - Invesco Ltd. filed a 13F-HR form disclosing ownership of 49,808 shares of Prothena Corporation plc (DE:0PT) valued at $408,426 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 19, 2026 disclosing 26,609 shares of Prothena Corporation plc. This represents a change in shares of 87.18% during the quarter. The current value of the position is $385,713 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)
2026-05-12 2026-03-31 13F PROTHENA CORP SHS G72800108 49,808 23,199 87.18 484 90.55 0.0001
2026-02-19 2025-12-31 13F PROTHENA CORP SHS G72800108 26,609 -4,694 -15.00 254 -16.72 0.0000
2025-11-13 2025-09-30 13F PROTHENA CORP SHS G72800108 31,303 -5,582 -15.13 306 36.77 0.0000
2025-08-13 2025-06-30 13F PROTHENA CORP SHS G72800108 36,885 -753 -2.00 224 -52.04 0.0000
2025-05-12 2025-03-31 13F PROTHENA CORP SHS G72800108 37,638 -5,208 -12.16 466 -21.59 0.0001
2025-02-13 2024-12-31 13F PROTHENA CORP SHS G72800108 42,846 1,632 3.96 593 -13.93 0.0001
2024-11-12 2024-09-30 13F PROTHENA CORP SHS G72800108 41,214 111 0.27 690 -18.75 0.0001
2024-08-13 2024-06-30 13F PROTHENA CORP SHS G72800108 41,103 599 1.48 848 -15.45 0.0002
2024-05-14 2024-03-31 13F PROTHENA CORP SHS G72800108 40,504 13,889 52.18 1,003 3.72 0.0002
2024-02-13 2023-12-31 13F PROTHENA CORP SHS G72800108 26,615 -4,102 -13.35 967 -34.75 0.0002
2023-11-13 2023-09-30 13F PROTHENA CORP SHS G72800108 30,717 -33,228 -51.96 1,482 -66.06 0.0004
2023-08-11 2023-06-30 13F PROTHENA CORP SHS G72800108 63,945 35,593 125.54 4,366 217.76 0.0011
2023-05-12 2023-03-31 13F PROTHENA CORP SHS G72800108 28,352 -13,952 -32.98 1,374 -46.08 0.0004
2023-02-13 2022-12-31 13F PROTHENA CORP SHS G72800108 42,304 24,822 141.99 2,549 140.15 0.0007
2022-11-14 2022-09-30 13F PROTHENA CORP SHS G72800108 17,482 -225,871 -92.82 1,061 -83.94 0.0003
2022-08-15 2022-06-30 13F PROTHENA CORP SHS G72800108 243,353 52,130 27.26 6,607 -5.53 0.0020
2022-05-16 2022-03-31 13F PROTHENA CORP SHS G72800108 191,223 33,403 21.17 6,994 -10.29 0.0018
2022-02-14 2021-12-31 13F PROTHENA CORP SHS G72800108 157,820 -189,604 -54.57 7,796 -68.50 0.0019
2021-11-15 2021-09-30 13F PROTHENA CORP SHS G72800108 347,424 51,565 17.43 24,748 62.70 0.0063
2021-08-17 2021-06-30 13F PROTHENA CORP SHS G72800108 295,859 67,574 29.60 15,211 165.23 0.0037
2021-05-17 2021-03-31 13F PROTHENA CORP SHS G72800108 228,285 197,641 644.96 5,735 1,458.42 0.0015
2021-02-16 2020-12-31 13F PROTHENA CORP SHS G72800108 30,644 -2,282 -6.93 368 11.85 0.0001
2020-11-16 2020-09-30 13F PROTHENA CORP SHS G72800108 32,926 -1,776 -5.12 329 -9.37 0.0001
2020-08-14 2020-06-30 13F PROTHENA CORP SHS G72800108 34,702 4,292 14.11 363 11.69 0.0001
2020-05-15 2020-03-31 13F PROTHENA CORP SHS G72800108 30,410 -2,957 -8.86 325 -38.45 0.0001
2020-02-14 2019-12-31 13F PROTHENA CORP SHS G72800108 33,367 -2,214 -6.22 528 89.25 0.0002
2019-11-14 2019-09-30 13F PROTHENA CORP SHS G72800108 35,581 -1,381 -3.74 279 -28.64 0.0001
2019-08-14 2019-06-30 13F/A-1 PROTHENA CORP SHS G72800108 36,962 -25,365 -40.70 391 -48.28 0.0001
2019-08-14 2019-06-30 13F PROTHENA CORP SHS G72800108 36,962 -25,365 391
2019-05-15 2019-03-31 13F PROTHENA CORP SHS G72800108 62,327 23,979 62.53 756 91.39 0.0003
2019-02-14 2018-12-31 13F PROTHENA CORP SHS G72800108 38,348 5,039 15.13 395 -9.40 0.0002
2018-11-14 2018-09-30 13F PROTHENA CORP SHS G72800108 33,309 -134 -0.40 436 -10.66 0.0001
2018-08-14 2018-06-30 13F PROTHENA CORP SHS G72800108 33,443 20,446 157.31 488 2.31 0.0002
2018-05-15 2018-03-31 13F PROTHENA CORP SHS G72800108 12,997 -243,452 -94.93 477 -95.04 0.0002
2018-02-14 2017-12-31 13F PROTHENA CORP SHS G72800108 256,449 278 0.11 9,614 -42.06 0.0035
2017-11-14 2017-09-30 13F PROTHENA CORP SHS G72800108 256,171 134 0.05 16,592 19.73 0.0061
2017-08-14 2017-06-30 13F PROTHENA CORP SHS G72800108 256,037 -4,653 -1.78 13,858 -4.72 0.0043
2017-05-15 2017-03-31 13F PROTHENA CORP SHS G72800108 260,690 -1,554 -0.59 14,544 12.74 0.0048
2017-02-14 2016-12-31 13F PROTHENA CORP SHS G72800108 262,244 -27 -0.01 12,900 -17.98 0.0043
2016-11-14 2016-09-30 13F PROTHENA CORP SHS G72800108 262,271 -3,347 -1.26 15,728 69.37 0.0054
2016-08-15 2016-06-30 13F PROTHENA CORP SHS G72800108 265,618 -20,321 -7.11 9,286 -21.10 0.0034
2016-05-16 2016-03-31 13F PROTHENA CORP SHS G72800108 285,939 -87,611 -23.45 11,769 -53.74 0.0048
2016-02-16 2015-12-31 13F PROTHENA CORP SHS G72800108 373,550 9,860 2.71 25,442 54.29 0.0102
2015-11-16 2015-09-30 13F PROTHENA CORP SHS G72800108 363,690 72,045 24.70 16,490 7.35 0.0070
2015-08-14 2015-06-30 13F PROTHENA CORP COMMON G72800108 291,645 26,894 10.16 15,361 52.13 0.0060
2015-05-15 2015-03-31 13F PROTHENA CORP COMMON G72800108 264,751 253,505 2,254.18 10,097 4,233.48 0.0039
2015-02-13 2014-12-31 13F PROTHENA CORP COMMON G72800108 11,246 2,193 24.22 233 15.92 0.0001
2014-11-14 2014-09-30 13F PROTHENA CORP COMMON G72800108 9,053 -18,787 -67.48 201 -67.99 0.0001
2014-08-14 2014-06-30 13F PROTHENA CORP COMMON G72800108 27,840 -90,750 -76.52 628 -86.18 0.0002
2014-05-15 2014-03-31 13F PROTHENA CORP COMMON G72800108 118,590 31,674 36.44 4,543 97.09 0.0018
2014-02-13 2013-12-31 13F PROTHENA CORP COMMON G72800108 86,916 16,743 23.86 2,305 62.32 0.0009
2013-11-13 2013-09-30 13F PROTHENA CORP COMMON G72800108 70,173 -1,192,609 -94.44 1,420 -91.29 0.0006
2013-08-14 2013-06-30 13F PROTHENA CORP COMMON G72800108 1,262,782 1,262,782 16,303 0.0076
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.