SEC 13F Intelligence

M28 Capital Management LP / ATRAGBX

M28 Capital Management LP’s Atara Biotherapeutics Inc Com New Position

Does M28 Capital Management LP own Atara Biotherapeutics Inc Com New (ATRAGBX)? Not currently — the last reported position was 439.3K shares worth $1M in Q1 2023; the fund’s latest 13F (Q1 2026) no longer reports it.

Position Value
$1M
Q1 2023
Shares
439.3K
% of Portfolio
+1.44%
Quarters Held
5
position exited

Position History ATRAGBX

Reported value by quarter
Q4 ’21: $7MQ4 ’21Q1 ’22: $4MQ1 ’22Q2 ’22: $2MQ2 ’22Q4 ’22: $1MQ4 ’22Q1 ’23: $1MQ1 ’23filingsflow.com
QuarterSharesValue% of Portfolio
Q1 2023439.3K$1M+1.44%
Q4 2022439.3K$1M+1.37%
Q2 2022269.3K$2M+2.35%
Q1 2022389.4K$4M+3.33%
Q4 2021456.9K$7M+5.62%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See M28 Capital Management LP’s full portfolio or all institutional holders of ATRAGBX.