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PRTA

15 quarters

Position history for Massachusetts Financial Services Co.Massachusetts Financial Services Co.'s holdings in Prothena Corporation plc

Yes. Massachusetts Financial Services holds 126,990 shares of PRTA (Prothena), worth $1.2M, as of its Q2 2026 13F filing. It reduced the position by 5,061 shares (-3.8%) from Q1 2026. Massachusetts Financial Services has held PRTA since Q4 2024, across 7 quarterly 13F filings.

Current Value

$1.2M

Current Shares

126,990

Total Value Change

+$372,232

Total Shares Change

+39,769

Quarter-by-Quarter History
QuarterActionSharesChangeValueWeightPriceConviction
2026-Q2
Latest
Decreased
126,990
-3.8%
$1.2M0.0%$9.79
0
2026-Q1
Increased
132,051
+187.3%
$1.3M0.0%$9.72
41
2025-Q4
Decreased
45,970
-3.2%
$439,0130.0%$9.55
0
2025-Q3
Increased
47,489
+7.0%
$463,4930.0%$9.76
26
2025-Q2
Increased
44,364
+1.3%
$269,2890.0%$6.07
23
2025-Q1
Decreased
43,816
-2.2%
$542,2230.0%$12.38
0
2024-Q4
New
44,815
-
$620,6880.0%$13.85
34
2022-Q2
Exited
0
-100.0%
$00.0%$27.15
0
2022-Q1
Decreased
13,556
-67.6%
$496,0000.0%$36.57
0
2021-Q4
Decreased
41,858
-2.0%
$2.1M0.0%$49.40
0
2021-Q3
Decreased
42,706
-1.3%
$3M0.0%$71.23
0
2021-Q2
Decreased
43,268
-41.0%
$2.2M0.0%$51.41
0
2021-Q1
Decreased
73,339
-32.5%
$1.8M0.0%$25.12
0
2020-Q4
Increased
108,594
+24.5%
$1.3M0.0%$12.01
31
2020-Q3
New
87,221
-
$871,0000.0%$9.99
34

Other major holders of PRTA: FMR LLC, T. Rowe Price Associates, Inc.

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