What big investors reported

What changed since the prior report

Green means the manager reported a new or larger share amount. Red means a smaller amount or the stock was no longer listed. This compares two delayed reports; it does not show the exact trade.

PUT and CALL are contract labels, not common-share holdings. A 13F reports these option rows but does not establish whether the strategy is bullish, bearish, hedged, or part of a spread. It also does not reveal strike, expiry, premium, or the rest of the manager's book.

• CALLCIEN CIENA CORP$311.5 M
  LARGER REPORTED AMOUNT634,900 shCALL is the filed contract type.
• PUTCIEN CIENA CORP$235.3 M
  LARGER REPORTED AMOUNT479,600 shPUT is the filed contract type.
• CALLCORE SCIENTIFIC INC NEW$186.6 M
  LARGER REPORTED AMOUNT7,291,300 shCALL is the filed contract type.
• PUTTMO THERMO FISHER SCIENTIFIC INC$150.0 M
  LARGER REPORTED AMOUNT299,200 shPUT is the filed contract type.
• CALLGILD GILEAD SCIENCES INC$136.3 M
  SMALLER REPORTED AMOUNT1,079,100 shCALL is the filed contract type.
• PUTGILD GILEAD SCIENCES INC$128.4 M
  LARGER REPORTED AMOUNT1,016,500 shPUT is the filed contract type.
• CALLTMO THERMO FISHER SCIENTIFIC INC$127.1 M
  SMALLER REPORTED AMOUNT253,500 shCALL is the filed contract type.
• PUTCORE SCIENTIFIC INC NEW$121.0 M
  LARGER REPORTED AMOUNT4,726,800 shPUT is the filed contract type.
• CALLBSX BOSTON SCIENTIFIC CORP$115.3 M
  LARGER REPORTED AMOUNT2,701,600 shCALL is the filed contract type.
• PUTBSX BOSTON SCIENTIFIC CORP$105.2 M
  LARGER REPORTED AMOUNT2,466,000 shPUT is the filed contract type.

66 more option comparison rows in this filing.