S&CO INC: RIG position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of S&CO INC on RIG, newest first. How the timeline and the estimate are built.

S&CO INC held 45,000 RIG shares at 2026-06-30 per its 13F-HR filed 2026-08-06.

the latest 13F is the newest step

period ended2026-06-30
13F 45,000 shares
Change vs previous 13F 0 shares
0.01% of the 13F portfolio, value $220,000.
13F-HR 0001082461-26-000003 filed by S&CO INC
Filed 2026-08-06 (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 45,000 shares
Change vs previous 13F not available
0.02% of the 13F portfolio, value $298,000.
13F-HR 0001082461-26-000002 filed by S&CO INC
Filed 2026-05-07 (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).