| Filed | As-Of/On | Form | Fullname | Fund Class | Shares | Activity | Shares Change | Shares Pct. Change | Hypothetical Old Value | Hypothetical New Value | Hypothetical Value Chg. | Hypotheticals Return |
Hypotheticals Results |
Director |
Other |
Ten Pct |
Officer |
Officer Title |
History |
|---|
| 2010-03-12 | 2010-03-10 | 4 | Weld Gwen E | Insider | 148,516 | Sold Some | -6,000 | -3.88 % | $1,240,109 | $1,250,505 | $10,396 | 0.83 % | $-420 | | X | | | Vp Hr And Organizational Dev | History of Weld Gwen E Ownership Of Isilon Systems Inc |
| 2010-03-10 | 2010-03-09 | 4 | Patel Sujal M | Insider | 2,619,164 | Sold Some | -12,000 | -0.45 % | $22,970,068 | $22,053,361 | $-916,707 | -3.99 % | $4,200 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-03-10 | 2010-03-08 | 4 | Patel Sujal M | Insider | 2,631,164 | Sold Some | -12,000 | -0.45 % | $23,075,308 | $22,154,401 | $-920,907 | -3.99 % | $4,200 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-03-05 | 2009-12-31 | 13F-HR/A | Royal Bank Of Canada | Institution | 1,233 | New Holding | 1,233 | 100 % | $10,468 | $10,382 | $-86 | -0.82 % | $-86 | | | | | | History of Royal Bank Of Canada Ownership Of Isilon Systems Inc |
| 2010-03-03 | 2009-12-31 | 13F-HR/A | Vanguard Group Inc | Institution | 881,791 | Added More | 38,533 | 4.56 % | $7,045,510 | $7,424,680 | $379,170 | 5.38 % | $16,569 | | | | | | History of Vanguard Group Inc Ownership Of Isilon Systems Inc |
| 2010-02-26 | 2010-02-25 | 4 | Patel Sujal M | Insider | 2,643,164 | Sold Some | -12,000 | -0.45 % | $19,532,982 | $22,255,441 | $2,722,459 | 13.93 % | $-12,360 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-02-26 | 2010-02-24 | 4 | Patel Sujal M | Insider | 2,655,164 | Sold Some | -12,000 | -0.44 % | $19,621,662 | $22,356,481 | $2,734,819 | 13.93 % | $-12,360 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-02-26 | 2009-12-31 | 13F-HR | Three Zero Three Capital Partners Llc | No Data | 1,400 | Added More | 100 | 7.69 % | $10,346 | $11,788 | $1,442 | 13.93 % | $103 | | | | | | History of Three Zero Three Capital Partners Llc Ownership Of Isilon Systems Inc |
| 2010-02-25 | 2009-12-31 | 13F-HR/A | Northern Trust Corp | Institution | 315,576 | Sold Some | -858 | -0.27 % | $2,294,238 | $2,657,150 | $362,912 | 15.81 % | $-987 | | | | | | History of Northern Trust Corp Ownership Of Isilon Systems Inc |
| 2010-02-25 | 2009-09-30 | 13F-HR | Three Zero Three Capital Partners Llc | No Data | 1,300 | New Holding | 1,300 | 100 % | $9,451 | $10,946 | $1,495 | 15.81 % | $1,495 | | | | | | History of Three Zero Three Capital Partners Llc Ownership Of Isilon Systems Inc |
| 2010-02-18 | 2010-02-16 | 4 | Weld Gwen E | Insider | 154,516 | Sold Some | -12,500 | -7.48 % | $1,183,593 | $1,301,025 | $117,432 | 9.92 % | $-9,500 | | X | | | Vp Hr And Organizational Dev | History of Weld Gwen E Ownership Of Isilon Systems Inc |
| 2010-02-18 | 2009-12-31 | 13F-HR/A | American International Group Inc | Institution | 21,107 | Added More | 186 | 0.88 % | $161,680 | $177,721 | $16,041 | 9.92 % | $141 | | | | | | History of American International Group Inc Ownership Of Isilon Systems Inc |
| 2010-02-17 | 2009-12-31 | 13F-HR | Barclays Plc | Institution | 3,558 | Sold Some | -28,634 | -88.94 % | $27,005 | $29,958 | $2,953 | 10.93 % | $-23,766 | | | | | | History of Barclays Plc Ownership Of Isilon Systems Inc |
| 2010-02-17 | 2009-12-31 | 13F-HR | Castleark Management Llc | Institution | | Sold All | -188,400 | -100 % | | | | 10.93 % | $-156,372 | | | | | | History of Castleark Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-17 | 2009-12-31 | 13F-HR | Us Bancorp De | Institution | 1,878 | Added More | 185 | 10.92 % | $14,254 | $15,813 | $1,559 | 10.93 % | $154 | | | | | | History of Us Bancorp De Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Alkeon Capital Management Llc | Institution | | Sold All | -80,000 | -100 % | | | | 7.94 % | $-49,600 | | | | | | History of Alkeon Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Amvescap Plc | Institution | 298,996 | Added More | 2,934 | 0.99 % | $2,332,169 | $2,517,546 | $185,378 | 7.94 % | $1,819 | | | | | | History of Amvescap Plc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Artis Capital Management Llc | Institution | 688,123 | Sold Some | -1,261,714 | -64.70 % | $5,367,359 | $5,793,996 | $426,636 | 7.94 % | $-782,263 | | | | | | History of Artis Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Black River Asset Management Llc | Institution | 9,730 | New Holding | 9,730 | 100 % | $75,894 | $81,927 | $6,033 | 7.94 % | $6,033 | | | | | | History of Black River Asset Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Bogle Investment Management L P | Institution | | Sold All | -74,889 | -100 % | | | | 7.94 % | $-46,431 | | | | | | History of Bogle Investment Management L P Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Credit Suisse First Boston | Institution | 16,926 | New Holding | 16,926 | 100 % | $132,023 | $142,517 | $10,494 | 7.94 % | $10,494 | | | | | | History of Credit Suisse First Boston Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Fmr Corp | Institution | 13,700 | Sold Some | -511,100 | -97.38 % | $106,860 | $115,354 | $8,494 | 7.94 % | $-316,882 | | | | | | History of Fmr Corp Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Goldman Sachs Group Inc | Institution | 198,013 | Added More | 7,099 | 3.71 % | $1,544,501 | $1,667,269 | $122,768 | 7.94 % | $4,401 | | | | | | History of Goldman Sachs Group Inc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Ing Groep Nv | Institution | 24,210 | Added More | 6,950 | 40.26 % | $188,838 | $203,848 | $15,010 | 7.94 % | $4,309 | | | | | | History of Ing Groep Nv Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Ladenburg Thalmann Asset Management | No Data | 8,000 | No Compare | | | $62,400 | $67,360 | $4,960 | 7.94 % | | | | | | | History of Ladenburg Thalmann Asset Management Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Mfc Global Investment Management Usa Ltd | Institution | 28,473 | Added More | 629 | 2.25 % | $222,089 | $239,743 | $17,653 | 7.94 % | $390 | | | | | | History of Mfc Global Investment Management Usa Ltd Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Millennium Management Llc | Institution | | Sold All | -21,636 | -100 % | | | | 7.94 % | $-13,414 | | | | | | History of Millennium Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Morgan Stanley | Institution | | Sold All | -19,757 | -100 % | | | | 7.94 % | $-12,249 | | | | | | History of Morgan Stanley Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Principal Financial Group Inc | Institution | 533,000 | New Holding | 533,000 | 100 % | $4,157,400 | $4,487,860 | $330,460 | 7.94 % | $330,460 | | | | | | History of Principal Financial Group Inc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Shaw D E And Co Inc | Institution | | Sold All | -41,353 | -100 % | | | | 7.94 % | $-25,639 | | | | | | History of Shaw D E And Co Inc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Sterling Johnston Capital Management Lp | Institution | 60,750 | New Holding | 60,750 | 100 % | $473,850 | $511,515 | $37,665 | 7.94 % | $37,665 | | | | | | History of Sterling Johnston Capital Management Lp Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Summit Capital Management Llc | Institution | 281,342 | Sold Some | -18,000 | -6.01 % | $2,194,468 | $2,368,900 | $174,432 | 7.94 % | $-11,160 | | | | | | History of Summit Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Symmetry Peak Management Llc | Institution | | Sold All | -727,940 | -100 % | | | | 7.94 % | $-451,323 | | | | | | History of Symmetry Peak Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Ubs Ag | Institution | 13,288 | Sold Some | -1,221 | -8.41 % | $103,646 | $111,885 | $8,239 | 7.94 % | $-757 | | | | | | History of Ubs Ag Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Wexford Capital Llc | Institution | 21,500 | New Holding | 21,500 | 100 % | $167,700 | $181,030 | $13,330 | 7.94 % | $13,330 | | | | | | History of Wexford Capital Llc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-12-31 | 13F-HR | Zebra Capital Management Llc | Institution | 3,340 | New Holding | 3,340 | 100 % | $26,052 | $28,123 | $2,071 | 7.94 % | $2,071 | | | | | | History of Zebra Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-16 | 2009-09-30 | 13F-HR/A | Ubs Ag | Institution | 14,509 | Added More | 11,461 | 376.01 % | $113,170 | $122,166 | $8,996 | 7.94 % | $7,106 | | | | | | History of Ubs Ag Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2010-02-12 | 13F-HR | Batterymarch Financial Management Inc | Institution | 49,100 | New Holding | 49,100 | 100 % | $381,016 | $413,422 | $32,406 | 8.50 % | $32,406 | | | | | | History of Batterymarch Financial Management Inc Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2010-02-12 | 4 | Patel Sujal M | Insider | 2,667,164 | Sold Some | -12,000 | -0.44 % | $20,697,193 | $22,457,521 | $1,760,328 | 8.50 % | $-7,920 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2010-02-11 | 4 | Patel Sujal M | Insider | 2,679,164 | Sold Some | -12,000 | -0.44 % | $20,790,313 | $22,558,561 | $1,768,248 | 8.50 % | $-7,920 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Ameriprise Financial Inc | Institution | 1,400 | Added More | 200 | 16.66 % | $10,864 | $11,788 | $924 | 8.50 % | $132 | | | | | | History of Ameriprise Financial Inc Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Axa | Institution | 12,950 | Sold Some | -27,400 | -67.90 % | $100,492 | $109,039 | $8,547 | 8.50 % | $-18,084 | | | | | | History of Axa Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Barclays Global Investors Na Ca | Institution | 564,660 | Added More | 464,312 | 462.70 % | $4,381,762 | $4,754,437 | $372,676 | 8.50 % | $306,446 | | | | | | History of Barclays Global Investors Na Ca Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Blackrock Fund Advisors | No Data | 600,293 | No Compare | | | $4,658,274 | $5,054,467 | $396,193 | 8.50 % | | | | | | | History of Blackrock Fund Advisors Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Blackrock Investment Management Llc | Institution | 42,968 | Added More | 2,552 | 6.31 % | $333,432 | $361,791 | $28,359 | 8.50 % | $1,684 | | | | | | History of Blackrock Investment Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Driehaus Capital Management Llc | Institution | 176,931 | Sold Some | -143,886 | -44.84 % | $1,372,985 | $1,489,759 | $116,774 | 8.50 % | $-94,965 | | | | | | History of Driehaus Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Geode Capital Management Llc | Institution | 59,440 | No Change | 0 | 0 % | $461,254 | $500,485 | $39,230 | 8.50 % | $0 | | | | | | History of Geode Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Knight Capital Group Inc | Institution | 12,038 | Sold Some | -16,418 | -57.69 % | $93,415 | $101,360 | $7,945 | 8.50 % | $-10,836 | | | | | | History of Knight Capital Group Inc Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Northern Trust Co Of Connecticut | Institution | 47,000 | New Holding | 47,000 | 100 % | $364,720 | $395,740 | $31,020 | 8.50 % | $31,020 | | | | | | History of Northern Trust Co Of Connecticut Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Oppenheimer Funds Inc | Institution | 600 | No Change | 0 | 0 % | $4,656 | $5,052 | $396 | 8.50 % | $0 | | | | | | History of Oppenheimer Funds Inc Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Price T Rowe Associates Inc | Institution | 50,400 | Sold Some | -200 | -0.39 % | $391,104 | $424,368 | $33,264 | 8.50 % | $-132 | | | | | | History of Price T Rowe Associates Inc Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Renaissance Technologies Corp | Institution | 824,902 | Sold Some | -67,100 | -7.52 % | $6,401,240 | $6,945,675 | $544,435 | 8.50 % | $-44,286 | | | | | | History of Renaissance Technologies Corp Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Spark Lp | Institution | 15,100 | Sold Some | -28,000 | -64.96 % | $117,176 | $127,142 | $9,966 | 8.50 % | $-18,480 | | | | | | History of Spark Lp Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | Technical Financial Services Llc | Institution | 37,453 | Added More | 7,800 | 26.30 % | $290,635 | $315,354 | $24,719 | 8.50 % | $5,148 | | | | | | History of Technical Financial Services Llc Ownership Of Isilon Systems Inc |
| 2010-02-12 | 2009-12-31 | 13F-HR | United Services Automobile Association | Institution | 44,600 | New Holding | 44,600 | 100 % | $346,096 | $375,532 | $29,436 | 8.50 % | $29,436 | | | | | | History of United Services Automobile Association Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2010-02-09 | 4 | Bennett George H | No Data | 5,000 | New Holding | 5,000 | 100 % | $38,050 | $42,100 | $4,050 | 10.64 % | $4,050 | | X | | | Svp Ww Field Operations | History of Bennett George H Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2010-02-09 | 4 | Conder Keenan Michael | Insider | 20,000 | Added More | 7,500 | 150.00 % | $152,200 | $168,400 | $16,200 | 10.64 % | $6,075 | | X | | | Vp General Counsel Secty | History of Conder Keenan Michael Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2010-02-09 | 4 | Godwin Mary E | Insider | 6,600 | New Holding | 6,600 | 100 % | $50,226 | $55,572 | $5,346 | 10.64 % | $5,346 | | X | | | Vp Operations | History of Godwin Mary E Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2010-02-09 | 4 | Helsel Brett | Insider | 8,200 | Added More | 7,500 | -110.29 % | $62,402 | $69,044 | $6,642 | 10.64 % | $6,075 | | X | | | Svp Engineering | History of Helsel Brett Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2010-02-09 | 4 | Patel Sujal M | Insider | 2,691,164 | Added More | 25,000 | 0.94 % | $20,479,758 | $22,659,601 | $2,179,843 | 10.64 % | $20,250 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2010-02-09 | 4 | Richter William D | Insider | 14,395 | Added More | 13,500 | -107.10 % | $109,546 | $121,206 | $11,660 | 10.64 % | $10,935 | | X | | | Cfo Vp Finance | History of Richter William D Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2010-02-09 | 4 | Rutherford Paul G | Insider | 134,099 | Added More | 6,600 | 5.45 % | $1,020,493 | $1,129,114 | $108,620 | 10.64 % | $5,346 | | X | | | Cto | History of Rutherford Paul G Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2010-02-09 | 4 | Weld Gwen E | Insider | 167,016 | Added More | 6,600 | 4.29 % | $1,270,992 | $1,406,275 | $135,283 | 10.64 % | $5,346 | | X | | | Vp Hr And Organizational Dev | History of Weld Gwen E Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2009-12-31 | 13F-HR | Highbridge Capital Management Llc | Institution | | Sold All | -59,198 | -100 % | | | | 10.64 % | $-47,950 | | | | | | History of Highbridge Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2009-12-31 | 13F-HR | Ing Investment Management Co | Institution | 24,210 | Added More | 6,950 | 40.26 % | $184,238 | $203,848 | $19,610 | 10.64 % | $5,630 | | | | | | History of Ing Investment Management Co Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2009-12-31 | 13F-HR | Metropolitan Life Insurance Co | Institution | 26,921 | Added More | 2,501 | 10.24 % | $204,869 | $226,675 | $21,806 | 10.64 % | $2,026 | | | | | | History of Metropolitan Life Insurance Co Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2009-12-31 | 13F-HR | Padco Advisors Ii Inc | Institution | 894 | No Change | 0 | 0 % | $6,803 | $7,527 | $724 | 10.64 % | $0 | | | | | | History of Padco Advisors Ii Inc Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2009-12-31 | 13F-HR | Padco Advisors Inc | Institution | 1,239 | Added More | 100 | 8.77 % | $9,429 | $10,432 | $1,004 | 10.64 % | $81 | | | | | | History of Padco Advisors Inc Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2009-12-31 | 13F-HR | Rs Investment Management Co Llc | Institution | 2,019,733 | Added More | 1,758,877 | 674.27 % | $15,370,168 | $17,006,152 | $1,635,984 | 10.64 % | $1,424,690 | | | | | | History of Rs Investment Management Co Llc Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2009-12-31 | 13F-HR | Teachers Advisors Inc | Institution | 22,873 | No Change | 0 | 0 % | $174,064 | $192,591 | $18,527 | 10.64 % | $0 | | | | | | History of Teachers Advisors Inc Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2009-12-31 | 13F-HR | Tiaa Cref Investment Management Llc | Institution | 168,451 | Added More | 24,000 | 16.61 % | $1,281,912 | $1,418,357 | $136,445 | 10.64 % | $19,440 | | | | | | History of Tiaa Cref Investment Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-11 | 2009-12-31 | 13F-HR | Wall Street Associates | Institution | 1,941,900 | Added More | 1,122,300 | 136.93 % | $14,777,859 | $16,350,798 | $1,572,939 | 10.64 % | $909,063 | | | | | | History of Wall Street Associates Ownership Of Isilon Systems Inc |
| 2010-02-10 | 2009-12-31 | 13F-HR | Dimensional Fund Advisors Inc | Institution | 649,114 | Added More | 87,109 | 15.49 % | $4,868,355 | $5,465,540 | $597,185 | 12.26 % | $80,140 | | | | | | History of Dimensional Fund Advisors Inc Ownership Of Isilon Systems Inc |
| 2010-02-10 | 2009-12-31 | 13F-HR | Panagora Asset Management Inc | Institution | 56,845 | Added More | 22,948 | 67.69 % | $426,338 | $478,635 | $52,297 | 12.26 % | $21,112 | | | | | | History of Panagora Asset Management Inc Ownership Of Isilon Systems Inc |
| 2010-02-10 | 2009-12-31 | 13F-HR | Parametric Portfolio Associates | Institution | 12,937 | Added More | 467 | 3.74 % | $97,028 | $108,930 | $11,902 | 12.26 % | $430 | | | | | | History of Parametric Portfolio Associates Ownership Of Isilon Systems Inc |
| 2010-02-10 | 2009-12-31 | 13F-HR | Tesseract Capital Llc | No Data | | Sold All | -200 | -100 % | | | | 12.26 % | $-184 | | | | | | History of Tesseract Capital Llc Ownership Of Isilon Systems Inc |
| 2010-02-10 | 2009-03-31 | 13F-HR | National Asset Management Inc | No Data | | Sold All | -1,300 | -100 % | | | | 12.26 % | $-1,196 | | | | | | History of National Asset Management Inc Ownership Of Isilon Systems Inc |
| 2010-02-09 | 2009-12-31 | 13F-HR | California Public Employees Retirement System | Institution | 89,097 | New Holding | 89,097 | 100 % | $655,754 | $750,197 | $94,443 | 14.40 % | $94,443 | | | | | | History of California Public Employees Retirement System Ownership Of Isilon Systems Inc |
| 2010-02-09 | 2009-12-31 | 13F-HR | Oxford Asset Management | Institution | 15,719 | Sold Some | -26,858 | -63.08 % | $115,692 | $132,354 | $16,662 | 14.40 % | $-28,469 | | | | | | History of Oxford Asset Management Ownership Of Isilon Systems Inc |
| 2010-02-09 | 2009-12-31 | 13F-HR | Prescott Group Capital Management Llc | Institution | 87,449 | Added More | 40,000 | 84.30 % | $643,625 | $736,321 | $92,696 | 14.40 % | $42,400 | | | | | | History of Prescott Group Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-09 | 2009-12-31 | 13F-HR | Stephens Inc | Institution | 191,875 | New Holding | 191,875 | 100 % | $1,412,200 | $1,615,588 | $203,388 | 14.40 % | $203,388 | | | | | | History of Stephens Inc Ownership Of Isilon Systems Inc |
| 2010-02-08 | 2009-12-31 | 13F-HR | Wesbanco Bank Inc | Institution | 15,000 | No Change | 0 | 0 % | $111,450 | $126,300 | $14,850 | 13.32 % | $0 | | | | | | History of Wesbanco Bank Inc Ownership Of Isilon Systems Inc |
| 2010-02-05 | 2009-12-31 | 13F-HR | Gartmore Mutual Fund Capital Trust | Institution | 128 | Added More | 14 | 12.28 % | $916 | $1,078 | $161 | 17.59 % | $18 | | | | | | History of Gartmore Mutual Fund Capital Trust Ownership Of Isilon Systems Inc |
| 2010-02-05 | 2009-12-31 | 13F-HR | Rhumbline Advisers | Institution | 36,662 | Added More | 200 | 0.54 % | $262,500 | $308,694 | $46,194 | 17.59 % | $252 | | | | | | History of Rhumbline Advisers Ownership Of Isilon Systems Inc |
| 2010-02-05 | 2009-12-31 | 13F-HR | Robeco Institutional Asset Management Bv | Institution | | Sold All | -225,000 | -100 % | | | | 17.59 % | $-283,500 | | | | | | History of Robeco Institutional Asset Management Bv Ownership Of Isilon Systems Inc |
| 2010-02-04 | 2009-12-31 | 13F-HR | Gagnon Securities Llc | Institution | 97,335 | No Change | 0 | 0 % | $676,478 | $819,561 | $143,082 | 21.15 % | $0 | | | | | | History of Gagnon Securities Llc Ownership Of Isilon Systems Inc |
| 2010-02-04 | 2009-12-31 | 13F-HR | Loch Capital Management Llc | Institution | | Sold All | -10,700 | -100 % | | | | 21.15 % | $-15,729 | | | | | | History of Loch Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-03 | 2009-12-31 | 13F-HR | Engemann Asset Management | Institution | 134,537 | Added More | 133,867 | 19980.14 % | $889,290 | $1,132,802 | $243,512 | 27.38 % | $242,299 | | | | | | History of Engemann Asset Management Ownership Of Isilon Systems Inc |
| 2010-02-03 | 2009-12-31 | 13F-HR | Seneca Capital Management Llc | Institution | 24,790 | New Holding | 24,790 | 100 % | $163,862 | $208,732 | $44,870 | 27.38 % | $44,870 | | | | | | History of Seneca Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-02-03 | 2009-12-31 | 13F-HR | Turner Investment Partners Inc | Institution | | Sold All | -32,890 | -100 % | | | | 27.38 % | $-59,531 | | | | | | History of Turner Investment Partners Inc Ownership Of Isilon Systems Inc |
| 2010-02-02 | 2009-12-31 | 13F-HR | Glynn Capital Management Llc | Institution | 435,035 | New Holding | 435,035 | 100 % | $2,884,282 | $3,662,995 | $778,713 | 26.99 % | $778,713 | | | | | | History of Glynn Capital Management Llc Ownership Of Isilon Systems Inc |
| 2010-01-28 | 2010-01-27 | 4 | Patel Sujal M | Insider | 2,666,164 | Sold Some | -12,000 | -0.44 % | $17,809,976 | $22,449,101 | $4,639,125 | 26.04 % | $-20,880 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-01-28 | 2010-01-26 | 4 | Patel Sujal M | Insider | 2,678,164 | Sold Some | -12,000 | -0.44 % | $17,890,136 | $22,550,141 | $4,660,005 | 26.04 % | $-20,880 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-01-28 | 2009-12-31 | 13F-HR | State Board Of Administration Of Florida Retirement System | Institution | 34,319 | Added More | 1,300 | 3.93 % | $229,251 | $288,966 | $59,715 | 26.04 % | $2,262 | | | | | | History of State Board Of Administration Of Florida Retirement System Ownership Of Isilon Systems Inc |
| 2010-01-27 | 2009-12-31 | 13F-HR | Sc X Management Llc | Institution | 11,651,603 | No Change | 0 | 0 % | $79,929,997 | $98,106,497 | $18,176,501 | 22.74 % | $0 | | | | | | History of Sc X Management Llc Ownership Of Isilon Systems Inc |
| 2010-01-22 | 2009-12-31 | 13F-HR | Bailard Biehl And Kaiser Inc | Institution | 11,800 | New Holding | 11,800 | 100 % | $79,768 | $99,356 | $19,588 | 24.55 % | $19,588 | | | | | | History of Bailard Biehl And Kaiser Inc Ownership Of Isilon Systems Inc |
| 2010-01-22 | 2009-12-31 | 13F-HR | Strs Ohio | Institution | 78,400 | Added More | 52,256 | 199.87 % | $529,984 | $660,128 | $130,144 | 24.55 % | $86,745 | | | | | | History of Strs Ohio Ownership Of Isilon Systems Inc |
| 2010-01-19 | 2009-12-31 | 13F-HR | Bank Of New York Mellon Corp | Institution | 96,613 | Added More | 1,774 | 1.87 % | $680,156 | $813,481 | $133,326 | 19.60 % | $2,448 | | | | | | History of Bank Of New York Mellon Corp Ownership Of Isilon Systems Inc |
| 2010-01-15 | 2010-01-15 | 4 | Patel Sujal M | Insider | 2,690,164 | Sold Some | -12,000 | -0.44 % | $18,669,738 | $22,651,181 | $3,981,443 | 21.32 % | $-17,760 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-01-15 | 2010-01-14 | 4 | Patel Sujal M | Insider | 2,702,164 | Sold Some | -12,000 | -0.44 % | $18,753,018 | $22,752,221 | $3,999,203 | 21.32 % | $-17,760 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2010-01-15 | 2009-12-31 | 13F-HR | Private Wealth Partners Llc | Institution | 40,000 | New Holding | 40,000 | 100 % | $277,600 | $336,800 | $59,200 | 21.32 % | $59,200 | | | | | | History of Private Wealth Partners Llc Ownership Of Isilon Systems Inc |
| 2010-01-14 | 2009-12-31 | 13F-HR | Public Employees Retirement System Of Ohio | Institution | 31,523 | No Change | 0 | 0 % | $224,129 | $265,424 | $41,295 | 18.42 % | $0 | | | | | | History of Public Employees Retirement System Of Ohio Ownership Of Isilon Systems Inc |
| 2010-01-12 | 2009-09-30 | 13F-HR/A | Ing Investment Management Co | Institution | 17,260 | Added More | 2,610 | 17.81 % | $119,094 | $145,329 | $26,235 | 22.02 % | $3,967 | | | | | | History of Ing Investment Management Co Ownership Of Isilon Systems Inc |
| 2010-01-04 | 2009-09-30 | 13F-HR/A | California Public Employees Retirement System | Institution | | Sold All | -89,097 | -100 % | | | | 20.97 % | $-130,082 | | | | | | History of California Public Employees Retirement System Ownership Of Isilon Systems Inc |
| 2009-12-30 | 2009-12-29 | 4 | Patel Sujal M | Insider | 2,714,164 | Sold Some | -12,000 | -0.44 % | $18,646,307 | $22,853,261 | $4,206,954 | 22.56 % | $-18,600 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2009-12-30 | 2009-12-28 | 4 | Patel Sujal M | Insider | 2,726,164 | Sold Some | -12,000 | -0.43 % | $18,728,747 | $22,954,301 | $4,225,554 | 22.56 % | $-18,600 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2009-12-17 | 2009-12-16 | 4 | Patel Sujal M | Insider | 2,738,164 | Sold Some | -12,000 | -0.43 % | $19,030,240 | $23,055,341 | $4,025,101 | 21.15 % | $-17,640 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2009-12-17 | 2009-12-15 | 4 | Patel Sujal M | Insider | 2,750,164 | Sold Some | -12,000 | -0.43 % | $19,113,640 | $23,156,381 | $4,042,741 | 21.15 % | $-17,640 | X | X | | | President Ceo | History of Patel Sujal M Ownership Of Isilon Systems Inc |
| 2009-12-15 | 2008-12-31 | 13F-HR | National Asset Management Inc | No Data | 1,300 | No Compare | | | $8,515 | $10,946 | $2,431 | 28.54 % | | | | | | | History of National Asset Management Inc Ownership Of Isilon Systems Inc |