Mainstream Capital Management LLC: GLW position timeline
Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Mainstream Capital Management LLC on GLW, newest first. How the timeline and the estimate are built.
Mainstream Capital Management LLC held 14,289 GLW shares at 2026-06-30 per its 13F-HR filed 2026-07-15.
the latest 13F is the newest step
- period ended2026-06-3013F 14,289 sharesChange vs previous 13F +108 shares
2.2% of the 13F portfolio, value $3,649,839.
13F-HR 0002043084-26-000003 filed by Mainstream Capital Management LLC
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2026-03-3113F 14,181 sharesChange vs previous 13F +24 shares
1.29% of the 13F portfolio, value $1,928,191.
13F-HR 0002043084-26-000002 filed by Mainstream Capital Management LLC
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2025-12-3113F 14,157 sharesChange vs previous 13F +14,157 shares
0.81% of the 13F portfolio, value $1,239,587.
13F-HR 0002043084-26-000001 filed by Mainstream Capital Management LLC
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
- period ended2025-03-3113F 0 sharesChange vs previous 13F -742 shares
13F-HR 0002043084-25-000002 filed by Mainstream Capital Management LLC
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).
Exited: the 13F for this period no longer lists the position.
- period ended2024-12-3113F 742 sharesChange vs previous 13F not available
0.02% of the 13F portfolio, value $35,260.
13F-HR 0002043084-25-000001 filed by Mainstream Capital Management LLC
Filed (acceptance time not in the bulk data set), ingestedAcceptance time not in the bulk data set (spec §4.2).