Across its top 15 institutional holders, ASTC's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 8/100, avg. turnover score 32/100).

Quarterly Activity

Recent Activity

+$344.3K

Total Buy Value

$166.1K

Total Sell Value

New buy4

Trim1

Add3

Sold out4

Net Buyers

Net Sellers

Smart Money Convergence

ASTC does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.

13F data as of 2026-03-31 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/ASTC

Insider Trading (Form 4)

Form 144 Pre-Sale Notices

No Form 144 planned sale filings in the last 90 days

Beneficial Ownership (13D/13G)

Active 5%+ Holders

Data as of 2026-07-01

Reporting Person	Type	Filing Date	Shares	% of Class
Skylark Partners I, LP	13G/A	2026-07-01	100	0.0%

View all Schedule 13D/13G filings

Material Events (8-K)

Filings (14d)

Data as of 2026-07-22

2026-07-22

AI summary pending

View Full Filing (SEC EDGAR)

View all Form 8-K filings

CUSIP

046484309

FAQ

Who are the top institutional investors holding ASTROTECH CORP (ASTC)?

Major stakeholders currently include J. Safra Sarasin Holding AG ($140.0K), BlackRock, Inc. ($105.6K), Geode Capital Management, LLC ($101.2K). Based on the latest 13F filings, there are a total of 15 tracked investment funds and institutions maintaining positions in ASTC.

What is the overall institutional sentiment toward ASTC recently?

Institutional sentiment appears Bullish (Net Buying). During the most recent reporting quarter, the stock experienced a net inflow of $189.6K, driven by 7 managers accumulating shares while 5 reduced their exposure.

Which institutions have been selling or reducing their ASTC positions?

In the latest period, 1 funds trimmed their holdings, and 4 managers completely exited their positions. The aggregate reported sell value was $166.1K.

Are there any notable investors adding ASTC to their portfolios?

Yes, buying activity remains notable. 4 institutions opened new positions in {ticker}, and 3 existing holders added to their shares. The total reported buy value for the quarter amounted to $344.3K.

Related Stocks

Trending Institutional Adds

The most-added stocks by 13F institutions this quarter

MSFT

Microsoft CORP

Institutions Holding

6,151

Total reported value

$2.1T

3246 13F institutions increased their position this quarter

View detail

AMZN

Amazon.com INC

Institutions Holding

5,958

Total reported value

$1.5T

3029 13F institutions increased their position this quarter

View detail

NVDA

Nvidia CORP

Institutions Holding

5,766

Total reported value

$3.0T

2744 13F institutions increased their position this quarter

View detail

Developer Access

Access ASTC's institutional ownership data programmatically:

REST API

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

CLI

npx alphasmo stocks get ASTC

Full API & MCP documentation →

Reporting Person

Type

Filing Date

% of Class

Skylark Partners I, LP

13G/A

2026-07-01

0.0%