PROTHENA CORP PLC

Ticker: PRTA CUSIP: G72800108 Class: Common Stock

Granahan Investment Management, LLC's Holding History (CIK: 0001026710)

Note: Option positions (PUT/CALL) are excluded.

Q2 2025

Shares 461,082 Value ($000) $2,799 Avg Close $7.50 Range $4.32 - $12.45

Q3 2024

Shares 312,520 Value ($000) $5,228 Avg Close $21.50 Range $15.52 - $25.42

Q2 2024

Shares 335,660 Value ($000) $6,928 Avg Close $21.64 Range $18.69 - $26.36

Q1 2024

Shares 333,920 Value ($000) $8,271 Avg Close $29.75 Range $24.25 - $41.55

Q4 2023

Shares 417,157 Value ($000) $15,159 Avg Close $38.49 Range $28.51 - $55.89

Q3 2023

Shares 348,065 Value ($000) $16,794 Avg Close $59.41 Range $45.22 - $73.14

Q2 2023

Shares 295,057 Value ($000) $20,146 Avg Close $64.50 Range $47.45 - $79.65

Q1 2023

Shares 232,628 Value ($000) $11,275 Avg Close $52.83 Range $45.06 - $60.82

Q4 2022

Shares 199,926 Value ($000) $12,046 Avg Close $58.56 Range $50.89 - $66.47

Q3 2022

Shares 141,108 Value ($000) $8,555 Avg Close $31.61 Range $25.02 - $64.00

Q2 2022

Shares 159,325 Value ($000) $4,326 Avg Close $29.25 Range $21.06 - $40.31

Q1 2022

Shares 124,106 Value ($000) $4,539 Avg Close $36.05 Range $29.53 - $49.77

Q4 2021

Shares 90,179 Value ($000) $4,455 Avg Close $55.45 Range $40.50 - $74.32

Q3 2021

Shares 45,304 Value ($000) $3,227 Avg Close $62.11 Range $45.09 - $79.75

Q2 2015

Shares 33,894 Value ($000) $1,785 Avg Close $39.47 Range $30.14 - $55.97

Q1 2015

Shares 33,894 Value ($000) $1,293 Avg Close $25.65 Range $18.76 - $45.00

Q4 2014

Shares 33,894 Value ($000) $704 Avg Close $20.87 Range $17.00 - $24.67

Q3 2014

Shares 33,894 Value ($000) $751 Avg Close $21.20 Range $16.71 - $24.31

Q2 2014

Shares 33,894 Value ($000) $764 Avg Close $25.01 Range $18.52 - $41.33

Q1 2014

Shares 33,894 Value ($000) $1,298 Avg Close $32.24 Range $24.42 - $49.24

Q4 2013

Shares 33,894 Value ($000) $899 Avg Close $25.08 Range $18.93 - $30.55

Q3 2013

Shares 33,894 Value ($000) $686 Avg Close $17.69 Range $12.14 - $22.48

Q2 2013

Shares 37,394 Value ($000) $483 Avg Close $9.30 Range $6.49 - $14.00

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2025	461,082	$2,799	$7.50	$4.32 - $12.45
Q3 2024	312,520	$5,228	$21.50	$15.52 - $25.42
Q2 2024	335,660	$6,928	$21.64	$18.69 - $26.36
Q1 2024	333,920	$8,271	$29.75	$24.25 - $41.55
Q4 2023	417,157	$15,159	$38.49	$28.51 - $55.89
Q3 2023	348,065	$16,794	$59.41	$45.22 - $73.14
Q2 2023	295,057	$20,146	$64.50	$47.45 - $79.65
Q1 2023	232,628	$11,275	$52.83	$45.06 - $60.82
Q4 2022	199,926	$12,046	$58.56	$50.89 - $66.47
Q3 2022	141,108	$8,555	$31.61	$25.02 - $64.00
Q2 2022	159,325	$4,326	$29.25	$21.06 - $40.31
Q1 2022	124,106	$4,539	$36.05	$29.53 - $49.77
Q4 2021	90,179	$4,455	$55.45	$40.50 - $74.32
Q3 2021	45,304	$3,227	$62.11	$45.09 - $79.75
Q2 2015	33,894	$1,785	$39.47	$30.14 - $55.97
Q1 2015	33,894	$1,293	$25.65	$18.76 - $45.00
Q4 2014	33,894	$704	$20.87	$17.00 - $24.67
Q3 2014	33,894	$751	$21.20	$16.71 - $24.31
Q2 2014	33,894	$764	$25.01	$18.52 - $41.33
Q1 2014	33,894	$1,298	$32.24	$24.42 - $49.24
Q4 2013	33,894	$899	$25.08	$18.93 - $30.55
Q3 2013	33,894	$686	$17.69	$12.14 - $22.48
Q2 2013	37,394	$483	$9.30	$6.49 - $14.00