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$PRTA

$9.42 +$0.07 (0.75%)

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Insider Transactions

Insider Transaction Summary

Capital, LLC EcoR1

5,304,596 shares

Net: 0 B/S: -

WILLIAM P SCULLY

1,061,000 shares

Net: +325,000 B/S: ∞

Gene G. Kinney

520,000 shares

Net: +520,000 B/S: ∞

Tran Nguyen

230,000 shares

Net: +230,000 B/S: ∞

Dale B. Schenk

200,000 shares

Net: 0 B/S: -

Wagner M. Zago

190,000 shares

Net: +190,000 B/S: ∞

Chad J. Swanson

190,000 shares

Net: +190,000 B/S: ∞

Brandon S. Smith

190,000 shares

Net: +190,000 B/S: ∞

Michael J Malecek

190,000 shares

Net: +190,000 B/S: ∞

Karin L Walker

150,000 shares

Net: +150,000 B/S: ∞

ARTHUR W HOMAN

150,000 shares

Net: 0 B/S: -

Carol D. Karp

107,500 shares

Net: 0 B/S: -

David A Ford

107,500 shares

Net: 0 B/S: -

Sarah B. Noonberg

100,000 shares

Net: 0 B/S: -

David B. McNinch

100,000 shares

Net: 0 B/S: -

Anne Evans Kingston

100,000 shares

Net: +100,000 B/S: ∞

Hideki Garren

85,000 shares

Net: 0 B/S: -

Radhika Tripuraneni

50,000 shares

Net: 0 B/S: -

Martin Koller

50,000 shares

Net: 0 B/S: -

Tara Nickerson

45,000 shares

Net: 0 B/S: -

Dennis J. Selkoe

27,000 shares

Net: +27,000 B/S: ∞

William H. Jr. Dunn

27,000 shares

Net: +27,000 B/S: ∞

Shane Cooke

27,000 shares

Net: +27,000 B/S: ∞

Lars Ekman

27,000 shares

Net: +27,000 B/S: ∞

DANIEL G WELCH

27,000 shares

Net: +27,000 B/S: ∞

RICHARD T COLLIER

27,000 shares

Net: +27,000 B/S: ∞

Helen Susan Kim

20,183 shares

Net: 0 B/S: -

Paula K Cobb

20,183 shares

Net: 0 B/S: -

Karl Anders Olof Harfstrand

15,000 shares

Net: 0 B/S: -

Sanjiv Patel

15,000 shares

Net: 0 B/S: -

CHRISTOPHER S HENNEY

2,000 shares

Net: 0 B/S: -

Insider Name	Current Shares	Net Change (1yr)	Buy/Sell Ratio
Capital, LLC EcoR1	5,304,596	0	-
WILLIAM P SCULLY	1,061,000	+325,000	∞
Gene G. Kinney	520,000	+520,000	∞
Tran Nguyen	230,000	+230,000	∞
Dale B. Schenk	200,000	0	-
Wagner M. Zago	190,000	+190,000	∞
Chad J. Swanson	190,000	+190,000	∞
Brandon S. Smith	190,000	+190,000	∞
Michael J Malecek	190,000	+190,000	∞
Karin L Walker	150,000	+150,000	∞
ARTHUR W HOMAN	150,000	0	-
Carol D. Karp	107,500	0	-
David A Ford	107,500	0	-
Sarah B. Noonberg	100,000	0	-
David B. McNinch	100,000	0	-
Anne Evans Kingston	100,000	+100,000	∞
Hideki Garren	85,000	0	-
Radhika Tripuraneni	50,000	0	-
Martin Koller	50,000	0	-
Tara Nickerson	45,000	0	-
Dennis J. Selkoe	27,000	+27,000	∞
William H. Jr. Dunn	27,000	+27,000	∞
Shane Cooke	27,000	+27,000	∞
Lars Ekman	27,000	+27,000	∞
DANIEL G WELCH	27,000	+27,000	∞
RICHARD T COLLIER	27,000	+27,000	∞
Helen Susan Kim	20,183	0	-
Paula K Cobb	20,183	0	-
Karl Anders Olof Harfstrand	15,000	0	-
Sanjiv Patel	15,000	0	-
CHRISTOPHER S HENNEY	2,000	0	-

Individual Transactions

June 11, 2026

WILLIAM P SCULLY

Open Market Purchase

Change: +125,000

Price: $8.17

Shares: 1,061,000

Value: +$1,021,225

Insider	Filing Date	Transaction	Shares	Change	Price	Value
WILLIAM P SCULLY	Jun 12	Open Market Purchase (P) Market Purchase	1,061,000	+125,000	$8.17	+$1,021,225

June 04, 2026

WILLIAM P SCULLY

Open Market Purchase

Change: +50,000

Price: $9.31

Shares: 936,000

Value: +$465,295

Insider	Filing Date	Transaction	Shares	Change	Price	Value
WILLIAM P SCULLY	Jun 05	Open Market Purchase (P) Market Purchase	936,000	+50,000	$9.31	+$465,295

June 02, 2026

WILLIAM P SCULLY

Open Market Purchase

Change: +50,000

Price: $9.43

Shares: 886,000

Value: +$471,300

Insider	Filing Date	Transaction	Shares	Change	Price	Value
WILLIAM P SCULLY	Jun 03	Open Market Purchase (P) Market Purchase	886,000	+50,000	$9.43	+$471,300

May 22, 2026

WILLIAM P SCULLY

Open Market Purchase

Change: +100,000

Price: $9.81

Shares: 836,000

Value: +$981,300

Insider	Filing Date	Transaction	Shares	Change	Price	Value
WILLIAM P SCULLY	May 26	Open Market Purchase (P) Market Purchase	836,000	+100,000	$9.81	+$981,300

May 15, 2026

Dennis J. Selkoe

Grant/Award Acquisition

Change: +27,000

Price: $0.00

Shares: 27,000

Value: +$0

William H. Jr. Dunn

Grant/Award Acquisition

Change: +27,000

Price: $0.00

Shares: 27,000

Value: +$0

Shane Cooke

Grant/Award Acquisition

Change: +27,000

Price: $0.00

Shares: 27,000

Value: +$0

Lars Ekman

Grant/Award Acquisition

Change: +27,000

Price: $0.00

Shares: 27,000

Value: +$0

DANIEL G WELCH

Grant/Award Acquisition

Change: +27,000

Price: $0.00

Shares: 27,000

Value: +$0

RICHARD T COLLIER

Grant/Award Acquisition

Change: +27,000

Price: $0.00

Shares: 27,000

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Dennis J. Selkoe	May 15	Grant/Award Acquisition (A) Compensation/Award	27,000	+27,000	$0.00	+$0
William H. Jr. Dunn	May 15	Grant/Award Acquisition (A) Compensation/Award	27,000	+27,000	$0.00	+$0
Shane Cooke	May 15	Grant/Award Acquisition (A) Compensation/Award	27,000	+27,000	$0.00	+$0
Lars Ekman	May 15	Grant/Award Acquisition (A) Compensation/Award	27,000	+27,000	$0.00	+$0
DANIEL G WELCH	May 15	Grant/Award Acquisition (A) Compensation/Award	27,000	+27,000	$0.00	+$0
RICHARD T COLLIER	May 15	Grant/Award Acquisition (A) Compensation/Award	27,000	+27,000	$0.00	+$0

April 10, 2026

Anne Evans Kingston

Grant/Award Acquisition

Change: +100,000

Price: $0.00

Shares: 100,000

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Anne Evans Kingston	Apr 10	Grant/Award Acquisition (A) Compensation/Award	100,000	+100,000	$0.00	+$0

March 03, 2026

Wagner M. Zago

Grant/Award Acquisition

Change: +190,000

Price: $0.00

Shares: 190,000

Value: +$0

Karin L Walker

Grant/Award Acquisition

Change: +150,000

Price: $0.00

Shares: 150,000

Value: +$0

Chad J. Swanson

Grant/Award Acquisition

Change: +190,000

Price: $0.00

Shares: 190,000

Value: +$0

Brandon S. Smith

Grant/Award Acquisition

Change: +190,000

Price: $0.00

Shares: 190,000

Value: +$0

Michael J Malecek

Grant/Award Acquisition

Change: +190,000

Price: $0.00

Shares: 190,000

Value: +$0

Gene G. Kinney

Grant/Award Acquisition

Change: +520,000

Price: $0.00

Shares: 520,000

Value: +$0

Tran Nguyen

Grant/Award Acquisition

Change: +230,000

Price: $0.00

Shares: 230,000

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Wagner M. Zago	Mar 05	Grant/Award Acquisition (A) Compensation/Award	190,000	+190,000	$0.00	+$0
Karin L Walker	Mar 05	Grant/Award Acquisition (A) Compensation/Award	150,000	+150,000	$0.00	+$0
Chad J. Swanson	Mar 05	Grant/Award Acquisition (A) Compensation/Award	190,000	+190,000	$0.00	+$0
Brandon S. Smith	Mar 05	Grant/Award Acquisition (A) Compensation/Award	190,000	+190,000	$0.00	+$0
Michael J Malecek	Mar 05	Grant/Award Acquisition (A) Compensation/Award	190,000	+190,000	$0.00	+$0
Gene G. Kinney	Mar 05	Grant/Award Acquisition (A) Compensation/Award	520,000	+520,000	$0.00	+$0
Tran Nguyen	Mar 05	Grant/Award Acquisition (A) Compensation/Award	230,000	+230,000	$0.00	+$0

July 28, 2025

Wagner M. Zago

Grant/Award Acquisition

Change: +85,000

Price: $0.00

Shares: 85,000

Value: +$0

Karin L Walker

Grant/Award Acquisition

Change: +25,000

Price: $0.00

Shares: 25,000

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Wagner M. Zago	Jul 30	Grant/Award Acquisition (A) Compensation/Award	85,000	+85,000	$0.00	+$0
Karin L Walker	Jul 30	Grant/Award Acquisition (A) Compensation/Award	25,000	+25,000	$0.00	+$0