SEC 13F Intelligence

Avidity Partners Management LP / IMGNEUR

Avidity Partners Management LP’s Immunogen Inc Position

Does Avidity Partners Management LP own Immunogen Inc (IMGNEUR)? Not currently — the last reported position was 1.83M shares worth $54M in Q4 2023; the fund’s latest 13F (Q1 2026) no longer reports it.

Position Value
$54M
Q4 2023
Shares
1.83M
% of Portfolio
+1.98%
Quarters Held
3
position exited

Position History IMGNEUR

Reported value by quarter
Q2 ’23: $38MQ2 ’23Q3 ’23: $30MQ3 ’23Q4 ’23: $54MQ4 ’23filingsflow.com
QuarterSharesValue% of Portfolio
Q4 20231.83M$54M+1.98%
Q3 20231.92M$30M+1.23%
Q2 20232.00M$38M+1.32%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Avidity Partners Management LP’s full portfolio or all institutional holders of IMGNEUR.