SIONSionna Therapeutics, Inc. Common Stock

CSNasdaq (XNAS)·USD

Identity

Security key: 21632
Ticker: SION
Type: CS — Common Stock
Exchange: Nasdaq(XNAS)
Venue group: NASDAQ
Operating MIC: XNAS
Market: stocks
Locale: us
Currency: USD
Listed: 2025-02-07
Round lot: 100
Active: Yes
Last seen in a load: 2026-08-14 20:49
Vendor updated: 2026-08-13 06:09
Ticker root / suffix: SION

Detail

Enriched 2026-08-14 20:47

Market cap: $282,577,493.75
Shares outstanding (class): 45,212,399
Shares outstanding (weighted): 45,212,399
SIC: 2834 PHARMACEUTICAL PREPARATIONS
Employees: 59
Location: WALTHAM, MA
Homepage: https://www.sionnatx.com
Description: Sionna Therapeutics Inc is a clinical-stage biopharmaceutical company on a mission to revolutionize the current treatment paradigm for cystic fibrosis (CF) patients by developing novel medicines that normalize the function of the cystic fibrosis transmembrane conductance regulator (CFTR) protein to deliver clinically meaningful benefits to CF patients. CF is a progressive and life-threatening genetic disease caused by inherited mutations in the CFTR gene, which heads to insufficient CFTR function. The Company is managed as one operating segment focused on the research and development of cystic fibrosis therapies.

Market cap and share counts drift.

Funds holding this security

69 funds · 72 positions · $198.22M reported value, as of 2026-03-31

All holders →

Fund	Ticker	Position value	% of fund	Balance	Match
VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS	VTI	$33.79M	0.00%	842,941 NS	FIGI
Eventide Healthcare & Life Sciences Fund MUTUAL FUND SERIES TRUST	—	$25.84M	1.63%	644,524 NS	FIGI
JPMorgan Small Cap Growth Fund JPMorgan Trust II	—	$22.12M	1.02%	551,829 NS	FIGI
T. Rowe Price Health Sciences Fund, Inc. T. ROWE PRICE HEALTH SCIENCES FUND, INC.	—	$21.95M	0.20%	547,443 NS	FIGI
State Street(R) SPDR(R) S&P(R) Biotech ETF SPDR SERIES TRUST	XBI	$16.70M	0.22%	416,630 NS	FIGI
iShares Russell 2000 ETF iShares Trust	IWM	$16.03M	0.02%	399,869 NS	FIGI
abrdn Healthcare Investors —	—	$15.88M	1.40%	396,124 NS	FIGI
iShares Biotechnology ETF iShares Trust	IBB	$7.42M	0.09%	185,101 NS	FIGI
JPMorgan Small Cap Blend Fund JPMorgan Trust I	—	$7.14M	0.50%	178,151 NS	FIGI
abrdn Life Sciences Investors —	—	$6.74M	1.20%	168,051 NS	FIGI
VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS	VXF	$6.39M	0.01%	159,505 NS	FIGI
iShares Russell 2000 Growth ETF iShares Trust	IWO	$5.29M	0.04%	131,978 NS	FIGI
iShares Micro-Cap ETF iShares Trust	IWC	$1.64M	0.14%	40,927 NS	FIGI
T. Rowe Price Health Sciences Portfolio T. ROWE PRICE EQUITY SERIES, INC.	—	$1.43M	0.22%	35,707 NS	FIGI
Master Small Cap Index Series Quantitative Master Series LLC	—	$1.09M	0.02%	27,162 NS	FIGI

How positions resolve to the securities master. FIGI_COMPOSITE is exact identifier equality — both sides got the FIGI from Bloomberg. TICKER is a narrow fallback used only where the master row carries no FIGI at all (2,389 rows do not, disproportionately Irish-domiciled US listings like LIN and ACN). Roughly 22% of all positions resolve to the master.

Funds holding this security

Identifiers

master.security_identifier

TICKERSION
FIGI_COMPOSITEBBG016X2DC85
FIGI_SHARE_CLASSBBG016X2DCF7
CIK0002036042
ISINUS8294011080
Resolved through OpenFIGI from a holdings ISIN, not supplied by the securities vendor.

Identifiers

Classification

classification.v_security_classification

Asset class: Equity
Sector: Health Care
Industry: Pharmaceuticals
Source: LLMunreviewed
Self-reported confidence: 0.95
Model: deepseek
Rationale: Common stock of a pharmaceutical company, classified under healthcare and pharmaceuticals based on SIC code.

Classifications are unreviewed model output. All 5,771 assignments carry source = LLM and is_reviewed = false. Confidence is the model’s own estimate and is not calibrated — it clustered at 0.90–0.98 across the whole first pass, including rows that later proved wrong. Use it to order a review queue, not as a probability. Two share classes of one issuer can disagree.

Classification

Fund data

Not linked to a fund series.

Either this is not a fund, or it is one the SEC share-class snapshot cannot reach — commodity trusts and notes have no series ID at all.