OBERWEIS ASSET MANAGEMENT INC/: CHYM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of OBERWEIS ASSET MANAGEMENT INC/ on CHYM, newest first. How the timeline and the estimate are built.

OBERWEIS ASSET MANAGEMENT INC/ held 1,268,330 CHYM shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

period ended2026-06-30
13F 1,268,330 shares
Change vs previous 13F +232,800 shares
0.54% of the 13F portfolio, value $25,975,398.
13F-HR 0001213900-26-089777 filed by OBERWEIS ASSET MANAGEMENT INC/
Filed 2026-08-14 (acceptance time not in the bulk data set), ingested 2026-10-06 09:57:27 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2026-03-31
13F 1,035,530 shares
Change vs previous 13F not available
0.57% of the 13F portfolio, value $19,395,477.
13F-HR 0001213900-26-057307 filed by OBERWEIS ASSET MANAGEMENT INC/
Filed 2026-05-15 (acceptance time not in the bulk data set), ingested 2026-10-06 09:58:43 UTC
Acceptance time not in the bulk data set (spec §4.2).