Alliancebernstein L.P. Prothena Corp Public LTD CO Transaction History

Alliancebernstein L.P.

$290 Billion
Q2 2025

A detailed history of Alliancebernstein L.P. transactions in Prothena Corp Public LTD CO stock. As of the latest transaction made, Alliancebernstein L.P. holds 87,587 shares of PRTA stock, worth $941,560. This represents 0.0% of its overall portfolio holdings.

Number of Shares

87,587

Previous 46,753 87.34%

Holding current value

$941,560

Previous $578,000 8.13%

% of portfolio

0.0%

Previous 0.0%

19 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q2 2025 Aug 14, 2025	BUY	$4.58 - $12.14 $187,019 - $495,724	40,834 Added 87.34%	87,587 $531,000
Q4 2024 Feb 12, 2025	BUY	$11.95 - $18.35 $83 - $128	7 Added 0.01%	46,753 $647,000
Q4 2023 Feb 14, 2024	BUY	$32.31 - $52.32 $32,310 - $52,320	1,000 Added 2.19%	46,746 $1.7 Million
Q3 2023 Nov 14, 2023	SELL	$47.3 - $70.6 $160,820 - $240,039	-3,400 Reduced 6.92%	45,746 $2.21 Million
Q2 2023 Aug 15, 2023	BUY	$48.26 - $78.59 $206,552 - $336,365	4,280 Added 9.54%	49,146 $3.36 Million
Q4 2022 Feb 14, 2023	SELL	$52.05 - $65.0 $26,025 - $32,500	-500 Reduced 1.1%	44,866 $2.7 Million
Q2 2022 Aug 15, 2022	BUY	$22.73 - $39.98 $21,957 - $38,620	966 Added 2.18%	45,366 $1.23 Million
Q1 2022 May 13, 2022	BUY	$30.27 - $49.22 $3,027 - $4,922	100 Added 0.23%	44,400 $1.62 Million
Q4 2021 Feb 14, 2022	SELL	$42.11 - $73.26 $26,950 - $46,886	-640 Reduced 1.42%	44,300 $2.19 Million
Q3 2021 Nov 10, 2021	SELL	$48.2 - $78.89 $221,720 - $362,894	-4,600 Reduced 9.29%	44,940 $3.2 Million
Q2 2021 Jul 30, 2021	BUY	$21.63 - $57.65 $144,921 - $386,255	6,700 Added 15.64%	49,540 $2.55 Million
Q1 2021 May 06, 2021	SELL	$11.0 - $28.24 $80,300 - $206,152	-7,300 Reduced 14.56%	42,840 $1.08 Million
Q4 2020 Feb 08, 2021	SELL	$10.12 - $13.94 $49,587 - $68,306	-4,900 Reduced 8.9%	50,140 $602,000
Q2 2020 Aug 13, 2020	BUY	$9.56 - $12.51 $30,592 - $40,032	3,200 Added 6.17%	55,040 $576,000
Q1 2019 May 14, 2019	SELL	$10.32 - $14.49 $44,376 - $62,307	-4,300 Reduced 7.66%	51,840 $629,000
Q2 2018 Aug 13, 2018	SELL	$10.99 - $44.21 $11.1 Million - $44.5 Million	-1,007,495 Reduced 94.72%	56,140 $819,000
Q1 2018 May 14, 2018	BUY	$27.95 - $45.04 $1.61 Million - $2.6 Million	57,637 Added 5.73%	1,063,635 $39 Million
Q4 2017 Feb 13, 2018	BUY	$35.44 - $63.76 $3.59 Million - $6.46 Million	101,273 Added 11.19%	1,005,998 $37.7 Million
Q3 2017 Nov 13, 2017	BUY	$53.83 - $67.75 $48.7 Million - $61.3 Million	904,725	904,725 $58.6 Million

Others Institutions Holding PRTA

# of Institutions

218

Shares Held

34.2M

Call Options Held

879K

Put Options Held

791K

View Full List

About PROTHENA CORP PUBLIC LTD CO

Ticker PRTA
Exchange NASDAQ
Sector Healthcare
Industry Biotechnology
Shares Outstandng 46,922,800
Market Cap $504M
Description
Prothena Corporation plc, a late-stage clinical company, focuses on discovery and development of novel therapies for life-threatening diseases in the United States. The company is involved in developing Birtamimab, an investigational humanized antibody that is in Phase III clinical trial for the treatment of AL amyloidosis; Prasinezumab, a human...

More about PRTA

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Alliancebernstein L.P. Prothena Corp Public LTD CO Transaction History