CenterBook Partners LP: REGN position timeline

CenterBook Partners LP held 15,486 REGN shares at 2026-06-30 per its 13F-HR filed 2026-08-11.

the latest 13F is the newest step

1. period ended2026-06-30

   13F 15,486 shares

   Change vs previous 13F +10,426 shares

   0.47% of the 13F portfolio, value $9,656,140.

   13F-HR 0001872738-26-000010 filed by CenterBook Partners LP
   Filed 2026-08-11 (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).

2. period ended2026-03-31

   13F 5,060 shares

   Change vs previous 13F -25,186 shares

   0.21% of the 13F portfolio, value $3,909,558.

   13F-HR 0001872738-26-000008 filed by CenterBook Partners LP
   Filed 2026-05-05 (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).

3. period ended2025-12-31

   13F 30,246 shares

   Change vs previous 13F -26,977 shares

   1.14% of the 13F portfolio, value $23,345,980.

   13F-HR 0000902664-26-000841 filed by CenterBook Partners LP
   Filed 2026-02-11 (acceptance time not in the bulk data set), ingested 2026-10-07 03:01:36 UTC

   Acceptance time not in the bulk data set (spec §4.2).

4. period ended2025-09-30

   13F 57,223 shares

   Change vs previous 13F +5,632 shares

   1.59% of the 13F portfolio, value $32,174,776.

   13F-HR 0000902664-25-004789 filed by CenterBook Partners LP
   Filed 2025-11-07 (acceptance time not in the bulk data set), ingested 2026-10-07 03:02:25 UTC

   Acceptance time not in the bulk data set (spec §4.2).

5. period ended2025-06-30

   13F 51,591 shares

   Change vs previous 13F +45,877 shares

   1.5% of the 13F portfolio, value $27,085,275.

   13F-HR 0000902664-25-003518 filed by CenterBook Partners LP
   Filed 2025-08-12 (acceptance time not in the bulk data set), ingested 2026-10-07 18:23:11 UTC

   Acceptance time not in the bulk data set (spec §4.2).

6. period ended2025-03-31

   13F 5,714 shares

   Change vs previous 13F -10,270 shares

   0.23% of the 13F portfolio, value $3,623,990.

   13F-HR 0000902664-25-002221 filed by CenterBook Partners LP
   Filed 2025-05-09 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:06 UTC

   Acceptance time not in the bulk data set (spec §4.2).

7. period ended2024-12-31

   13F 15,984 shares

   Change vs previous 13F -7,784 shares

   0.68% of the 13F portfolio, value $11,385,883.

   13F-HR 0000902664-25-000921 filed by CenterBook Partners LP
   Filed 2025-02-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:55 UTC

   Acceptance time not in the bulk data set (spec §4.2).

8. period ended2024-09-30

   13F 23,768 shares

   Change vs previous 13F not available

   1.54% of the 13F portfolio, value $24,985,872.

   13F-HR 0000902664-24-006587 filed by CenterBook Partners LP
   Filed 2024-11-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:26:56 UTC

   Acceptance time not in the bulk data set (spec §4.2).