SIONNA THERAPEUTICS INC

$SION
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Smart money positioned

8 of the Top-200 alpha managers hold $SION as of the latest 13F snapshot.

13F holders
8
Insider buys · 90d
0
Congress · 90d
0

Smart Money · top-200 alpha cohort

8 holders · Q1 2026

$SION is held by 8 managers from the Top-Performer cohort as of Q1 2026. Position weights range from 0.00% to 0.54%, with an average of 0.20% of portfolio. Largest holder: Platinum Investment Management Ltd. at 0.54%. A weekly Smart-Money commentary for this ticker has not been generated yet this batch — the table below shows the full cohort positioning.

01
Platinum Investment Management Ltd.
0.54% held
α +25.6pts
02
BlackBarn Capital Partners LP
0.33% held
α +12.9pts
03
Fidelis Capital Partners, LLC
0.28% NEW
α +19.5pts
04
IAM Advisory, LLC
0.19% held
α +49.7pts
05
Japan Post Holdings Co., Ltd.
0.10% held
α +22.4pts

Smart Money shows holdings from our Top-Performer cohort — the 200 highest-alpha manager_13f funds in our universe. Position weight (current quarter) and QoQ delta versus prior quarter. α is the manager's annual alpha vs benchmark.

Institutional holders

Top 8 of 8 · Source: 13F-HR
01
Viking Global Investors LP
0.36% of portfolio
3,195,181 sh
02
Enavate Sciences GP, LLC
28.26% of portfolio
2,478,030 sh
03
Vanguard Group Inc.
—
1,184,951 sh
04
Citadel
0.03% of portfolio
1,166,931 sh
05
State Street
—
756,227 sh
06
Citigroup Inc.
—
18,058 sh
07
Two Sigma
—
5,500 sh
08
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
—
116 sh

Insider activity · last 90 days

50 transactions · 17 filers
09 Jul 2026
Unknown —
▼ SOLD
—
—
S
09 Jul 2026
Unknown —
▼ SOLD
—
—
S
07 Jul 2026
Unknown —
· EX/ACQ
—
—
M
07 Jul 2026
Unknown —
▼ SOLD
—
—
S
07 Jul 2026
Unknown —
· EX/ACQ
—
—
M
02 Jul 2026
Unknown —
▼ SOLD
—
—
S
02 Jul 2026
Unknown —
▼ SOLD
—
—
S
17 Jun 2026
Ruddy Marcella K. —
· GRANT
17,340
—
A
17 Jun 2026
Fleming Harold Edward —
· GRANT
17,340
—
A
17 Jun 2026
Viney Joanne L. —
· GRANT
17,340
—
A
17 Jun 2026
Resnick Joshua —
· GRANT
17,340
—
A
17 Jun 2026
Stelzer Laurie —
· GRANT
17,340
—
A

Transaction codes: P open-market purchase · S sale · M option exercise · A grant · F tax-withhold sale. Insider names link to each individual's expert page.

Congress trades · last 90 days

No Congress trades

No STOCK Act filings reference $SION in the recent window.

Convergence · $SION

Pattern cards reflect public SEC EDGAR and Congressional filing data only. Detection uses filing dates; trade execution dates may differ. Past convergence patterns do not predict future returns. Nothing here is investment advice.

Source data: SEC EDGAR · 13F-HR · Form 4 · U.S. House Clerk PTR (disclosures-clerk.house.gov) · Senate eFD (senate.gov) · Last refreshed 15:02 UTC.