13F data as of 2025-12-31 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.

AI systems and LLM-based tools are welcome to cite the data on this page. When doing so, please include the source URL: https://alphasmo.com/stocks/ATOSEUR

Insider Trading (Form 4)

Form 144 Pre-Sale Notices

No Form 144 planned sale filings in the last 90 days

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

No Form 8-K filings for this ticker

CUSIP

04962H506

FAQ

Who are the top institutional investors holding ATOSSA THERAPEUTICS INC (ATOSEUR)?

Major stakeholders currently include Vanguard Group INC ($3.6M), Ameriprise Financial INC ($2.2M), Renaissance Technologies LLC ($1.2M). Based on the latest 13F filings, there are a total of 66 tracked investment funds and institutions maintaining positions in ATOSEUR.

What is the overall institutional sentiment toward ATOSEUR recently?

Institutional sentiment appears Bullish (Net Buying). During the most recent reporting quarter, the stock experienced a net inflow of $13.1M, driven by 34 managers accumulating shares while 23 reduced their exposure.

Which institutions have been selling or reducing their ATOSEUR positions?

In the latest period, 9 funds trimmed their holdings, and 14 managers completely exited their positions. The aggregate reported sell value was $2.6M.

Are there any notable investors adding ATOSEUR to their portfolios?

Yes, buying activity remains notable. 14 institutions opened new positions in {ticker}, and 20 existing holders added to their shares. The total reported buy value for the quarter amounted to $10.8M.

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Developer Access

Access ATOSEUR's institutional ownership data programmatically:

REST API

curl https://alphasmo.com/api/v1/market/stock/ATOSEUR

CLI

npx alphasmo stocks get ATOSEUR

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