RKWD

ROCKWOOD RESEARCH · A CORPORATE FILINGS WEBSITE|STRAIGHT FROM THE SOURCE · SEC EDGAR|SPONSOREDYour message on this tape — bid on the Rockwood Ad Exchange · Rockwood Ad Exchange|

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AMPX

Amprius Technologies, Inc.

Miscellaneous Electrical Machinery, Equipment & Supplies · SIC 3690CIK 1899287Held by 5 tracked managersEDGAR filings ↗10-K/10-Q ↗

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5 of 5 reported changes in each tracked manager’s latest 13F vs its prior quarter (Q2 2026). Every change is listed — no cap.

ManagerActionShare change% chgEnding % of 13F bookPosition size

Holocene Advisors

Q2 2026Position history →

New+27,189—<0.01%$0.4M

Renaissance Technologies

Q2 2026Position history →

Add+1,049,400+291.9%0.03%$19.5M

Polen Capital Management

Q2 2026Position history →

Add+43,453+10.3%0.06%$6.5M

Zevenbergen Capital Investments

Q2 2026Position history →

Add+144,545+61.0%0.12%$5.3M

Q2 2026Position history →

Add+17,063+10.2%0.01%$2.6M

Changes compare each manager’s latest 13F with its prior quarter for the same CUSIP. “First observation” rows have no earlier stored filing to compare and are never counted as buys; “Split?” rows moved by a near-whole factor at an unchanged value and are treated as stock splits, not trades. Ending weight is the position after the change, not the size of the change.