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Equibles

MILLENNIUM MANAGEMENT LLC

Position in SION — Sionna Therapeutics, Inc.

CIK 1273087 NEW YORK, NY
Back to SION Full portfolio

Position in SION

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$12,173,484
+$6,535,187 QoQ
Shares Held
276,733
+96.8% QoQ
Ownership
0.612%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#27
of 146 holders
Holding Since
Mar 2025
6 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in SION Over Time

Shares Held

Position Value (USD)

Derivatives in SION

reported options exposure · as of Jun 30, 2026
CallValue
$879,800
CallShares
20,000
PutValue
$1,258,114
PutShares
28,600

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Biotechnology

Healthcare · as of Jun 30, 2026

MILLENNIUM MANAGEMENT LLC holds $4,631,421,099 across 322 Biotechnology names. SION ranks #90 (0.3% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 VRTX
Vertex Pharmaceuticals Inc / Ma
 468,410 $232,673,299
2 INSM
INSMED Inc
 2,048,005 $218,358,293
3 APGE
Apogee Therapeutics, Inc.
 1,491,404 $197,954,052
4 JAZZ
Jazz Pharmaceuticals plc
 763,880 $184,072,163
5 ONC
BeOne Medicines Ltd.
 543,323 $154,830,755
6 AXSM
Axsome Therapeutics, Inc.
 556,088 $136,113,659
7 BMRN
Biomarin Pharmaceutical Inc
 2,071,816 $118,549,311
8 REGN
Regeneron Pharmaceuticals, Inc.
 165,120 $102,958,924

All Filings in SION

Export CSV
8 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $879,800 20,000
2026-06-30 $12,173,484 276,733
2026-06-30 $1,258,114 28,600
2026-03-31 $5,638,297 140,641
2025-12-31 $3,313,662 80,546
2025-09-30 $6,296,239 214,085
2025-06-30 $243,489 14,034
2025-03-31 $1,873,093 179,072