ISAACS MICHAEL JOHN enters PROTHENA CORP PUBLIC LTD CO with 48.83K shares plus derivative instruments

Holding both equity and derivatives at entry signals strong long-term conviction in the company.

Direct Derivatives

ISAACS MICHAEL JOHN

Filed: 6/12/2026ACC: 0000905148-26-002932

InsiderISAACS MICHAEL JOHNCIK 2127815

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IssuerPROTHENA CORP PUBLIC LTD COCIK 1559053

Officer· General Counsel & Company Sec.

Since Jun 2026

48.83K

Baseline shares

100% direct

48.83K

Direct ownership

1 position

152.66K

Derivative underlying

8 instruments

Security positions

All direct

Non-Derivative Holdings1

Ordinary Shares, par value $0.01 per share

Direct

Shares owned48.83K

Total

48.83K direct48.83K

Security Title	Shares Owned	Ownership Type
Ordinary Shares, par value $0.01 per share	48.83K	Direct
Total	48.83K	48.83K direct

Derivative Holdings8

Stock Option (Right to Buy)

Direct

Underlying security

Ordinary Shares

Underlying shares

50K

Shares owned

N/A

Exercise price

10.50

Expiration

—

Exercise window

—

Stock Option (Right to Buy)

Direct

Underlying security

Ordinary Shares

Underlying shares

8.25K

Shares owned

N/A

Exercise price

32.45

Expiration

—

Exercise window

—

Stock Option (Right to Buy)

Direct

Underlying security

Ordinary Shares

Underlying shares

37.50K

Shares owned

N/A

Exercise price

9.36

Expiration

—

Exercise window

—

Stock Option (Right to Buy)

Direct

Underlying security

Ordinary Shares

Underlying shares

8.80K

Shares owned

N/A

Exercise price

52.97

Expiration

—

Exercise window

—

Stock Option (Right to Buy)

Direct

Underlying security

Ordinary Shares

Underlying shares

8.61K

Shares owned

N/A

Exercise price

14.95

Expiration

—

Exercise window

—

Stock Option (Right to Buy)

Direct

Underlying security

Ordinary Shares

Underlying shares

17.50K

Shares owned

N/A

Exercise price

10.99

Expiration

—

Exercise window

—

Stock Option (Right to Buy)

Direct

Underlying security

Ordinary Shares

Underlying shares

12K

Shares owned

N/A

Exercise price

30.30

Expiration

—

Exercise window

—

Stock Option (Right to Buy)

Direct

Underlying security

Ordinary Shares

Underlying shares

10K

Shares owned

N/A

Exercise price

22.60

Expiration

—

Exercise window

—

Total

Underlying

152.66K

Owned

0.00

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Stock Option (Right to Buy) Direct	Ordinary Shares	10.50	—	—	50K	N/A
Stock Option (Right to Buy) Direct	Ordinary Shares	32.45	—	—	8.25K	N/A
Stock Option (Right to Buy) Direct	Ordinary Shares	9.36	—	—	37.50K	N/A
Stock Option (Right to Buy) Direct	Ordinary Shares	52.97	—	—	8.80K	N/A
Stock Option (Right to Buy) Direct	Ordinary Shares	14.95	—	—	8.61K	N/A
Stock Option (Right to Buy) Direct	Ordinary Shares	10.99	—	—	17.50K	N/A
Stock Option (Right to Buy) Direct	Ordinary Shares	30.30	—	—	12K	N/A
Stock Option (Right to Buy) Direct	Ordinary Shares	22.60	—	—	10K	N/A
Total					152.66K	0.00