That would make current price a good entry point to accumulate more shares. This nonsense in D.C. can't continue indefinitely and when the smoke clears Celldex will be back up to flirting with 52 weeks highs in no time.
The Nasdaq site says institutional ownership is 73.82% (scroll way down under Institutional Holdings). It also lists the institutional owners, how many shares they own, and how their ownership has increased or decreased.
Fidelity says institutional ownership is 75.05% (under Ownership & Institutions).