145 institutions reported holding $363.6M of CLEARFIELD INC (CLFD) in SEC 13F filings for 2026-06-30. Largest institutional holders: AIGH Capital Management LLC ($40.1M), BlackRock, Inc. ($38.1M), VANGUARD GROUP INC ($37.1M), ACK Asset Management LLC ($32.2M), MAIRS & POWER INC ($15.3M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30