GAMCO Investors (Gabelli): BIO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of GAMCO Investors (Gabelli) on BIO, newest first. How the timeline and the estimate are built.

GAMCO Investors (Gabelli) held 52,650 BIO shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

period ended2026-06-30
13F 52,650 shares
Change vs previous 13F -2,500 shares
0.06% of the 13F portfolio, value $15,458,567.
13F-HR 0001140361-26-032508 filed by GAMCO INVESTORS, INC. ET AL
Filed 2026-08-12 (acceptance time not in the bulk data set), ingested 2026-10-06 09:57:27 UTC
- GAMCO INVESTORS, INC. ET AL: 26,750 shares
- GABELLI FUNDS LLC: 25,900 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2026-03-31
13F 55,150 shares
Change vs previous 13F -5,400 shares
0.06% of the 13F portfolio, value $15,373,063.
13F-HR 0001140361-26-021337 filed by GABELLI FUNDS LLC
Filed 2026-05-14 (acceptance time not in the bulk data set), ingested 2026-10-06 09:58:43 UTC
- GAMCO INVESTORS, INC. ET AL: 26,750 shares
- GABELLI FUNDS LLC: 28,400 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-12-31
13F 60,550 shares
Change vs previous 13F -4,000 shares
0.07% of the 13F portfolio, value $18,346,045.
13F-HR 0001140361-26-003893 filed by GABELLI FUNDS LLC
Filed 2026-02-05 (acceptance time not in the bulk data set), ingested 2026-10-07 03:01:36 UTC
- GAMCO INVESTORS, INC. ET AL: 26,750 shares
- GABELLI FUNDS LLC: 33,800 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-09-30
13F 64,550 shares
Change vs previous 13F -2,000 shares
0.07% of the 13F portfolio, value $18,099,175.
13F-HR 0001140361-25-041671 filed by GABELLI FUNDS LLC
Filed 2025-11-12 (acceptance time not in the bulk data set), ingested 2026-10-07 03:02:25 UTC
- GAMCO INVESTORS, INC. ET AL: 26,750 shares
- GABELLI FUNDS LLC: 37,800 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-06-30
13F 66,550 shares
Change vs previous 13F -500 shares
0.07% of the 13F portfolio, value $16,059,846.
13F-HR 0001140361-25-030816 filed by GABELLI FUNDS LLC
Filed 2025-08-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:23:11 UTC
- GAMCO INVESTORS, INC. ET AL: 26,750 shares
- GABELLI FUNDS LLC: 39,800 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-03-31
13F 67,050 shares
Change vs previous 13F 0 shares
0.07% of the 13F portfolio, value $16,330,698.
13F-HR 0001140361-25-018974 filed by GABELLI FUNDS LLC
Filed 2025-05-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:06 UTC
- GAMCO INVESTORS, INC. ET AL: 26,750 shares
- GABELLI FUNDS LLC: 40,300 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2024-12-31
13F 67,050 shares
Change vs previous 13F 0 shares
0.1% of the 13F portfolio, value $22,026,596.
13F-HR 0001140361-25-004328 filed by GABELLI FUNDS LLC
Filed 2025-02-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:55 UTC
- GAMCO INVESTORS, INC. ET AL: 26,750 shares
- GABELLI FUNDS LLC: 40,300 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2024-09-30
13F 67,050 shares
Change vs previous 13F not available
0.09% of the 13F portfolio, value $22,433,589.
13F-HR 0001140361-24-046503 filed by GABELLI FUNDS LLC
Filed 2024-11-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:26:56 UTC
- GAMCO INVESTORS, INC. ET AL: 26,750 shares
- GABELLI FUNDS LLC: 40,300 shares
Acceptance time not in the bulk data set (spec §4.2).