Illumina, Inc. (ILMN) rose 9.6% from its opening price of $25.71 to peak at $28.18, and close at $27.18. The increase would be something to celebrate had the genetic analysis instrument manufacturing company not closed at $39.93 the night before. From close of day Thursday to close of day Friday, the stock lost 31.93%. The loss came after ILMN suspended its revenue forecast after a slump in equipment purchases. Several hedge funds lost big on the news: 1. Renaissance Technologies - Jim Simons: Lost $10.1 million 2. Orbimed Advisors - Samuel Isaly: $9.5 million 3. Navellier & Associates - Louis Navellier: $6.7 million 4. D E Shaw - D. E. Shaw: Lost $6.6 million 5. Miura Global Management - Pasco Alfaro / Richard Tumure: Lost $4.4 million 6. Alyeska Investment Group - Anand Parekh: Lost $4.1 million 7. Sandler Capital Management - Andrew Sandler: Lost $3.7 million 8. Peconic Partners Llc - William Harnisch: $1.9 million These calculations assume that these hedge funds did not increase or reduce their stock positions in ILMN since the end of June. We did not take into account their option positions.