Walthausen & Co., LLC: PRDO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Walthausen & Co., LLC on PRDO, newest first. How the timeline and the estimate are built.

Walthausen & Co., LLC held 0 PRDO shares at 2021-12-31 per its 13F-HR filed 2022-02-11.

the latest 13F is the newest step

period ended2021-12-31
13F 0 shares
Change vs previous 13F -236,060 shares
13F-HR 0001483339-22-000002 filed by Walthausen & Co., LLC
Filed 2022-02-11 (acceptance time not in the bulk data set), ingested 2026-10-07 18:36:54 UTC
Acceptance time not in the bulk data set (spec §4.2).
Exited: the 13F for this period no longer lists the position.
period ended2021-09-30
13F 236,060 shares
Change vs previous 13F -177,240 shares
0.63% of the 13F portfolio, value $2,493,000.
13F-HR 0001483339-21-000006 filed by Walthausen & Co., LLC
Filed 2021-11-12 (acceptance time not in the bulk data set), ingested 2026-10-07 18:37:51 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2021-06-30
13F/A 413,300 shares
Change vs previous 13F +43,420 shares
1.12% of the 13F portfolio, value $5,071,000.
13F-HR/A 0001483339-21-000005 filed by Walthausen & Co., LLC
Filed 2021-08-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:38:33 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2021-03-31
13F 369,880 shares
Change vs previous 13F +133,260 shares
0.93% of the 13F portfolio, value $4,424,000.
13F-HR 0001483339-21-000003 filed by Walthausen & Co., LLC
Filed 2021-05-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:39:37 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2020-12-31
13F 236,620 shares
Change vs previous 13F not available
0.82% of the 13F portfolio, value $2,989,000.
13F-HR 0001483339-21-000002 filed by Walthausen & Co., LLC
Filed 2021-02-12 (acceptance time not in the bulk data set), ingested 2026-10-07 18:42:52 UTC
Acceptance time not in the bulk data set (spec §4.2).