Tamarack Capital Management, LLC: ATRC position timeline

Tamarack Capital Management, LLC held 0 ATRC shares at 2015-12-31 per its 13F-HR filed 2016-02-10.

the latest 13F is the newest step

1. period ended2015-12-31

   13F 0 shares

   Change vs previous 13F -825,000 shares

   13F-HR 0001095449-16-000190 filed by Tamarack Capital Management, LLC
   Filed 2016-02-10 (acceptance time not in the bulk data set), ingested 2026-10-07 19:14:07 UTC

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

   Exited: the 13F for this period no longer lists the position.

2. period ended2015-09-30

   13F 825,000 shares

   Change vs previous 13F -60,000 shares

   3.6% of the 13F portfolio, value $18,076,000.

   13F-HR 0001095449-15-000149 filed by Tamarack Capital Management, LLC
   Filed 2015-11-10 (acceptance time not in the bulk data set), ingested 2026-10-07 19:14:40 UTC

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

3. period ended2015-06-30

   13F 885,000 shares

   Change vs previous 13F +85,000 shares

   3.69% of the 13F portfolio, value $21,806,000.

   13F-HR 0001095449-15-000109 filed by Tamarack Capital Management, LLC
   Filed 2015-08-11 (acceptance time not in the bulk data set), ingested 2026-10-07 19:15:25 UTC

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

4. period ended2015-03-31

   13F 800,000 shares

   Change vs previous 13F +115,000 shares

   3.07% of the 13F portfolio, value $16,392,000.

   13F-HR 0001095449-15-000068 filed by Tamarack Capital Management, LLC
   Filed 2015-05-11 (acceptance time not in the bulk data set), ingested 2026-10-07 19:16:30 UTC

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

5. period ended2014-12-31

   13F 685,000 shares

   Change vs previous 13F -15,000 shares

   2.91% of the 13F portfolio, value $13,673,000.

   13F-HR 0001095449-15-000029 filed by Tamarack Capital Management, LLC
   Filed 2015-02-11 (acceptance time not in the bulk data set), ingested 2026-10-07 19:17:13 UTC

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

6. period ended2014-09-30

   13F 700,000 shares

   Change vs previous 13F +113,445 shares

   3.14% of the 13F portfolio, value $10,304,000.

   13F-HR 0001095449-14-000147 filed by Tamarack Capital Management, LLC
   Filed 2014-11-07 (acceptance time not in the bulk data set), ingested 2026-10-07 19:26:03 UTC

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

7. period ended2014-06-30

   13F 586,555 shares

   Change vs previous 13F +164,263 shares

   2.72% of the 13F portfolio, value $9,831,000.

   13F-HR 0001095449-14-000111 filed by Tamarack Capital Management, LLC
   Filed 2014-08-15 (acceptance time not in the bulk data set), ingested 2026-10-07 19:34:04 UTC

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

8. period ended2014-03-31

   13F 422,292 shares

   Change vs previous 13F not available

   2.7% of the 13F portfolio, value $7,943,000.

   13F-HR 0001095449-14-000074 filed by Tamarack Capital Management, LLC
   Filed 2014-05-12 (acceptance time not in the bulk data set), ingested 2026-10-07 19:42:28 UTC

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