SEC 13F Intelligence

Mainstream Capital Management LLC / GLW

Mainstream Capital Management LLC’s Corning Inc Position

Does Mainstream Capital Management LLC own Corning Inc (GLW)? Yes — 14.2K shares worth $2M (+1.29% of its 13F portfolio) as of Q1 2026, up from 14.2K shares the prior filed quarter.

Position Value
$2M
Q1 2026
Shares
14.2K
% of Portfolio
+1.29%
Quarters Held
3
currently held

Position History GLW

Reported value by quarter
Q4 ’24: $35,260Q4 ’24Q4 ’25: $1MQ4 ’25Q1 ’26: $2MQ1 ’26filingsflow.com
QuarterSharesValue% of Portfolio
Q1 202614.2K$2M+1.29%
Q4 202514.2K$1M+0.81%
Q4 2024742$35,260+0.02%

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