9 institutions reported holding $10.7M of CONTEMPORARY AMPEREX TECHNOL (CYATY) in SEC 13F filings for 2026-06-30. Largest institutional holders: Boston Common Asset Management, LLC ($4.7M), Douglass Winthrop Advisors, LLC ($3.2M), ZEVENBERGEN CAPITAL INVESTMENTS LLC ($2.2M), PNC Financial Services Group, Inc. ($235,448), RIVERBRIDGE PARTNERS LLC ($233,404). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Boston Common Asset Management, LLC | $4.7M | 209,775 | Trimmed |
| 2 | Douglass Winthrop Advisors, LLC | $3.2M | 140,786 | New |
| 3 | ZEVENBERGEN CAPITAL INVESTMENTS LLC | $2.2M | 96,025 | New |
| 4 | PNC Financial Services Group, Inc. | $235,448 | 10,483 | Added |
| 5 | RIVERBRIDGE PARTNERS LLC | $233,404 | 10,392 | Hold |
| 6 | RHUMBLINE ADVISERS | $215,388 | 9,590 | Added |
| 7 | ESSEX INVESTMENT MANAGEMENT CO LLC | $16,216 | 722 | Hold |
| 8 | IMA Advisory Services, Inc. | $22 | 1 | Hold |
| 9 | NBC SECURITIES, INC. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30