ATOSAtossa Therapeutics, Inc. Common Stock

CSNasdaq (XNAS)·USD

Identity

Security key: 12030
Ticker: ATOS
Type: CS — Common Stock
Exchange: Nasdaq(XNAS)
Venue group: NASDAQ
Operating MIC: XNAS
Market: stocks
Locale: us
Currency: USD
Listed: 2012-11-08
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: ATOS

Detail

Enriched 2026-08-14 20:47

Market cap: $23,451,350.3
Shares outstanding (class): 8,611,361
Shares outstanding (weighted): 9,979,298
SIC: 2834 PHARMACEUTICAL PREPARATIONS
Employees: 14
Location: SEATTLE, WA
Homepage: https://www.atossatherapeutics.com
Description: Atossa Therapeutics Inc is a clinical-stage biopharmaceutical company engaged in the development of proprietary medicines for oncology, with a focus on breast cancer and related conditions. The company's lead product candidate, oral (Z)-endoxifen, is a selective estrogen receptor modulator and degrader (SERM/SERD) in Phase 2 clinical development, being evaluated for the treatment and prevention of breast cancer and other indications.

Market cap and share counts drift.

Funds holding this security

6 funds · 6 positions · $2.04M 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	$1.35M	0.00%	256,137 NS	FIGI
VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS	VXF	$454.6K	0.00%	86,420 NS	FIGI
Columbia Variable Portfolio - Small Cap Value F… COLUMBIA FUNDS VARIABLE INSURANCE TRUST	—	$199.3K	0.05%	37,883 NS	FIGI
VANGUARD BALANCED INDEX FUND VANGUARD VALLEY FORGE FUNDS	—	$34.4K	0.00%	6,539 NS	FIGI
Diversified Equity Master Portfolio Master Investment Portfolio	—	$5.0K	0.00%	952 NS	FIGI
Blackstone Alternative Multi-Strategy Fund Blackstone Alternative Investment Funds	—	-$3.9K	-0.00%	-750 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

TICKERATOS
FIGI_COMPOSITEBBG002NCD8C8
FIGI_SHARE_CLASSBBG002NCD954
CIK0001488039
ISINUS04962H7044
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: The company is a pharmaceutical preparation firm per SIC code 2834, so it falls under healthcare and pharmaceuticals.

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.