See the top institutional holders, insider ownership, and recent ownership changes for SION.

What is SION institutional ownership? | Glauxie AI

The largest institutional holder is RA CAPITAL MANAGEMENT, L.P.. Recent insider activity: 1 buys, 18 sells — insiders are net selling SION.

See which hedge funds and institutional investors hold SION based on the latest 13F filings.

Identify the largest shareholder of SION and the top institutional and insider holders.

What is SION institutional ownership?

🦉

SION Ownership & Insider Activity

Name	Shares	Date
Thompson Peter A.	184.6K	2026-05-11
ORBIMED ADVISORS LLC	184.6K	2026-05-11
Thompson Peter A.	59.8K	2026-05-08
ORBIMED ADVISORS LLC	59.8K	2026-05-08
Thompson Peter A.	48.5K	2026-05-07
ORBIMED ADVISORS LLC	48.5K	2026-05-07
Thompson Peter A.	2.9K	2026-04-18
ORBIMED ADVISORS LLC	2.9K	2026-04-18
Thompson Peter A.	52.4K	2026-04-17
ORBIMED ADVISORS LLC	52.4K	2026-04-17

Insider Trades 13F Holdings SION Overview

Who owns SION stock? What hedge funds own SION? Who is the largest shareholder of SION?