Company Executives

$SION Management Team

Mr. Michael Cloonan

President

Chief Executive Officer

Director

Age 53

Compensation $3.727M USD

Sex Male

Ms. Caroline Beer

Chief Business Officer

Age -

Compensation -

Sex Female

DR. Charlotte McKee

Chief Medical Officer

Age -

Compensation $1.283M USD

Sex -

Ms. Elena Ridloff

Chief Financial Officer

Head - Corporate Development

Age 45

Compensation $1.301M USD

Sex Female

Name / Title	Age	Compensation	Sex
Mr. Michael Cloonan President Chief Executive Officer Director	53	$3.727M USD	Male
Ms. Caroline Beer Chief Business Officer	-	-	Female
DR. Charlotte McKee Chief Medical Officer	-	$1.283M USD	-
Ms. Elena Ridloff Chief Financial Officer Head - Corporate Development	45	$1.301M USD	Female

Board of Directors

From the proxy statement filed Apr 27, 2026

Directors

serving now

Independent

9 of 10

stated in the proxy

Average tenure

3.9 years

from year joined

CEO also chairs the board

Paul Clancy, M.B.A.

Director	Age	On board	Independent	Committees	Other public boards	2025 pay
H. Edward Fleming, Jr., M.D.	63	2024 2 years	Independent	Audit Committee	Upstream Bio, Inc.	$283,039
Marcella Kuhlman Ruddy, M.D.	63	2025 1 year	Independent	Nominating and Corporate Governance Committee	Upstream Bio, Inc.	$803,566
Peter A. Thompson, M.D.	66	2022 4 years	Independent	Nominating and Corporate Governance Committee	ARS Pharmaceuticals Inc.	$279,889
Joanne Louise Viney, Ph.D.	60	2025 1 year	Independent	Compensation Committee · Chair	None stated	$810,316
Bruce Booth, D.Phil.	52	2020 6 years	Independent	Compensation Committee	Kymera Therapeutics, Inc.	$281,239
Lucian Iancovici, M.D.	44	2019 7 years	Independent	Compensation Committee	Rallybio Corporation	Not stated
Joshua Resnick, M.D., M.B.A.	51	2019 7 years	Independent	None stated	PepGen Inc.	$275,839
Paul Clancy, M.B.A. Board chair	64	2022 4 years	Independent	Audit Committee Nominating and Corporate Governance Committee · Chair	Incyte Corporation	$323,139
Michael Cloonan, M.B.A. CEO	55	2021 5 years	Not independent	None stated	None stated	Paid as CEO
Laurie Stelzer, M.B.A.	58	2024 2 years	Independent	Audit Committee · Chair Compensation Committee	PMV Pharmaceuticals, Inc., MBX Biosciences, Inc.	$299,639

Each director opens the passage of the proxy that names them. "Not stated" means the proxy does not say; it never means "no". Pay is the proxy's Director Compensation table; the CEO is paid as an executive.

No related-party transactions disclosed

The proxy filed Apr 27, 2026 describes a review policy but reports no transactions.

Read the policy in the proxy

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