Amprius Technologies, Inc. (AMPX) Institutional Ownership

What the institutions did with AMPX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.

Managers compared

4

filed both this quarter and last

Managers holding

3

-1 on the quarter

Buyers

0

0 opened new

Sellers

1

1 sold out entirely

Buyer share

0.0%

of managers who traded it

Breadth

-100.0

net buyers, as a share of those trading

Only 4 managers reported a position this quarter, so the percentages above describe a very small sample.

Largest holders

Largest changes

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.