Stock Institutional Ownership and Shareholders

SecurityIRTC / iRhythm Technologies, Inc. (450056106)
President and CEOKing Kevin M
Institutional Owners108
Institutional Shares22,914,281
Institutional Value$ 1,239,041,000 USD

iRhythm Technologies, Inc. (NASDAQ:IRTC) has 108 institutional investors and shareholders that have filed 13D/G or 13F forms with the Securities Exchange Commission (SEC). These institutions hold a total of 22,914,281 shares. Largest shareholders include Capital Research Global Investors, FMR LLC / Fidelity Management & Research, BlackRock Inc., Columbia Wanger Asset Management Llc, Franklin Resources Inc, Alliancebernstein L.p., TimesSquare Capital Management, LLC, Bank of New York Mellon Corp, Vanguard Group Inc, and New Leaf Venture Partners, L.L.C..



iRhythm Technologies, Inc. (NASDAQ:IRTC) ownership summary shows current positions in the company by institutions and funds, as well as latest changes in position size. Major shareholders can include individual investors, mutual funds, hedge funds, or institutions. The Schedule 13D indicates that the investor holds more than 5% of the company and intends to actively pursue a change in business strategy. Schedule 13G indicates a passive investment of over 5%. Green rows indicate new positions. Red rows indicate closed positions. Click the link icon to see the full transaction history.

File DateFormInvestor Opt Prev Shares Current Shares Change
(Percent)
Prev Value (x$1000) Current Value (x$1000) Change
(Percent)
2017-11-13 13F-HR OSTERWEIS CAPITAL MANAGEMENT INC 77,225 56,480 -26.86 3,281 2,930 -10.70
2017-08-14 13F-HR MASSMUTUAL TRUST CO FSB/ADV 100 4,249
2017-11-13 13F-HR SCHWAB CHARLES INVESTMENT MANAGEMENT INC 40,271 76,586 90.18 1,712 3,974 132.13
2017-11-13 13F-HR FMR LLC / Fidelity Management & Research 1,542,886 2,155,542 39.71 65,557 111,830 70.58
2017-11-13 13F-HR TIAA CREF INVESTMENT MANAGEMENT LLC 166,750 133,618 -19.87 7,085 6,932 -2.16
2017-11-09 13F-HR TimesSquare Capital Management, LLC 1,060,230 796,620 -24.86 45,049 41,329 -8.26
2017-11-03 13F-HR BNP PARIBAS ARBITRAGE, SA 1,388 1,328 -4.32 58,976 68,897 16.82
2017-11-14 13F-HR Bayesian Capital Management, LP 5,734 297
2017-11-08 13F-HR ASSETMARK, INC 27 29 7.41 1 2 100.00
2017-11-14 13F-HR ADVISORY RESEARCH INC 67,254 84,568 25.74 2,858 4,387 53.50
2017-11-14 13F-HR SANDLER CAPITAL MANAGEMENT 99,450 5,159
2017-11-06 13F-HR GILDER GAGNON HOWE & CO LLC 115,592 112,500 -2.67 4,912 5,837 18.83
2017-11-13 13F-HR KENNEDY CAPITAL MANAGEMENT, INC. 123,299 6,397
2017-11-09 13F-HR CITADEL ADVISORS LLC 442,710 322,951 -27.05 18,811 16,755 -10.93
2017-11-06 13F-HR NEW YORK STATE COMMON RETIREMENT FUND 14,800 14,800 0.00 629 768 22.10
2017-11-14 13F-HR PERCEPTIVE ADVISORS LLC 372,671 19,335
2017-11-08 13F-HR EAM Investors, LLC 24,942 101,623 307.44 1,060 5,272 397.36
2017-11-13 13F-HR Employees Retirement System of Texas 41,000 26,000 -36.59 1,742 1,349 -22.56
2017-11-13 13F-HR COLUMBIA WANGER ASSET MANAGEMENT LLC 1,159,267 1,140,075 -1.66 49,257 59,147 20.08
2017-11-03 13F-HR JENNISON ASSOCIATES LLC 95,741 95,538 -0.21 4,068 4,957 21.85
2017-08-14 13F-HR Foresite Capital Management III, LLC 70,010 0 -100.00 2,632 0 -100.00
2017-11-13 13F-HR ASCEND CAPITAL, LLC 302,700 57,809 -80.90 12,862 3,001 -76.67
2017-10-27 13F-HR VICTORY CAPITAL MANAGEMENT INC 198,050 194,640 -1.72 8,415 10,098 20.00
2017-11-14 13F-HR CLOUGH CAPITAL PARTNERS L P 21,700 9,900 -54.38 922 514 -44.25
2017-11-14 13F-HR STATE STREET CORP 205,328 236,547 15.20 8,719 12,273 40.76
2017-11-14 13F-HR GOLDMAN SACHS GROUP INC 16,716 18,969 13.48 710 984 38.59
2017-11-14 13F-HR TWO SIGMA ADVISERS, LP 6,000 0 -100.00 255 0 -100.00
2017-11-14 13F-HR SECTORAL ASSET MANAGEMENT INC 185,170 185,200 0.02 7,868 9,608 22.11
2017-11-09 13F-HR WELLS FARGO & COMPANY/MN 364,776 609,187 67.00 15,501 31,604 103.88
2017-11-14 13F-HR DEUTSCHE BANK AG\ 178,792 177,069 -0.96 7,596 9,185 20.92
2017-11-14 13F-HR CREDIT SUISSE AG/ 35,007 180,919 416.81 1,488 9,386 530.78
2017-11-14 13F-HR MANUFACTURERS LIFE INSURANCE COMPANY, THE 11,204 10,932 -2.43 476 567 19.12
2017-11-09 13F-HR Legal & General Group Plc 3,373 3,668 8.75 143 191 33.57
2017-11-13 13F-HR CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 24,400 22,065 -9.57 1,037 1,145 10.41
2017-10-31 13F-HR STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 5,622 5,622 0.00 239 292 22.18
2017-11-14 13F-HR A.R.T. Advisors, LLC 10,521 545
2017-11-14 13F-HR BlackRock Inc. 980,893 1,483,898 51.28 41,679 76,985 84.71
2017-07-12 SC 13D/A Kaiser Permanente Ventures Llc, Series A 1,416,233 439,792 -68.95
2017-08-14 13F-HR Magnetar Financial LLC 7,445 0 -100.00 280 0 -100.00
2017-11-13 13F-HR MACKENZIE FINANCIAL CORP 28,500 20,630 -27.61 1,211 1,070 -11.64
2017-11-03 13F-HR Swiss National Bank 14,800 14,800 0.00 629 768 22.10
2017-11-07 13F-HR AMERIPRISE FINANCIAL INC 104,487 197,036 88.57 4,440 10,222 130.23
2017-11-06 13F-HR RHUMBLINE ADVISERS 15,749 15,939 1.21 669 827 23.62
2017-07-31 13F-HR Crestwood Advisors LLC 112 0 -100.00 4 0 -100.00
2017-11-13 13F-HR FRANKLIN RESOURCES INC 1,109,613 1,065,505 -3.98 47,147 55,278 17.25
2017-11-14 13F-HR Ghost Tree Capital, LLC 150,000 135,000 -10.00 6,374 7,004 9.88
2017-11-14 13F-HR Rock Springs Capital Management LP 386,000 20,026
2017-11-15 13F-HR Ameritas Investment Partners, Inc. 1,183 1,183 0.00 50 56 12.00
2017-11-13 13F-HR FIL Ltd 202,264 10,493
2017-11-13 13F-HR TEACHERS ADVISORS INC 62,364 56,364 -9.62 2,650 2,924 10.34
2017-11-14 13F-HR UBS Group AG 4,104 8,359 103.68 175 434 148.00
2017-11-14 13F-HR SUSQUEHANNA INTERNATIONAL GROUP, LLP Call 5,700 296
2017-11-14 13F-HR MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 237,660 239,110 0.61 10,098 12,405 22.85
2017-12-14 13F-HR/A-1 PARAMETRIC PORTFOLIO ASSOCIATES LLC 28,133 57,323 103.76 1,195 2,974 148.87
2017-11-07 13F-HR Russell Investments Group, Ltd. 20,632 33,054 60.21 876 1,713 95.55
2017-11-14 13F-HR Cubist Systematic Strategies, LLC 621 32
2017-11-14 13F-HR Voya Investment Management LLC 6,452 6,452 0.00 274 335 22.26
2017-11-14 13F-HR TWO SIGMA INVESTMENTS LLC 5,522 286
2017-11-14 13F-HR Adage Capital Partners GP LLC 250,000 250,000 0.00 10,623 12,970 22.09
2017-08-14 13F-HR Board of Trustees of The Leland Stanford Junior University 350,501 0 -100.00 13,179 0 -100.00
2017-11-14 13F-HR WADDELL & REED FINANCIAL INC 417,762 403,362 -3.45 17,751 20,927 17.89
2017-10-23 13F-HR Nationwide Fund Advisors 7,843 36,316 363.04 333 1,884 465.77
2017-11-14 13F-HR Redmile Group, LLC 476,341 552,041 15.89 20,240 28,640 41.50
2017-11-14 13F-HR Endurant Capital Management LP 165,500 44,300 -73.23 7,032 2,298 -67.32
2017-11-09 13F-HR AMERICAN INTERNATIONAL GROUP INC 8,556 9,247 8.08 364 480 31.87
2017-11-13 13F-HR CITIGROUP INC 91 472 418.68 4 25 525.00
2017-11-14 13F-HR LORD, ABBETT & CO. LLC 328,640 307,967 -6.29 13,964 15,978 14.42
2017-11-13 13F-HR ENVESTNET ASSET MANAGEMENT INC 41 41 0.00 1 3 200.00
2017-10-20 13F-HR/A-1 Shell Asset Management Co 15,063 781
2017-10-18 13F-HR Quantitative Systematic Strategies LLC 6,200 4,610 -25.65 262 239 -8.78
2017-08-14 13F-HR Novo A/S 2,024,448 0 -100.00 76,119 0 -100.00
2017-11-14 13F-HR Atika Capital Management LLC 61,500 3,190
2017-11-14 13F-HR Capital Research Global Investors 2,399,180 2,399,180 0.00 101,941 124,469 22.10
2017-11-14 13F-HR MENTA CAPITAL LLC 8,850 8,850 0.00 376 459 22.07
2017-11-14 13F-HR DRIEHAUS CAPITAL MANAGEMENT LLC 208,981 237,891 13.83 8,880 12,342 38.99
2017-11-14 13F-HR Tower Research Capital LLC (TRC) 165 1,227 643.64 7 64 814.29
2017-11-06 13F-HR Bank of New York Mellon Corp 607,054 737,271 21.45 25,794 38,250 48.29
2017-11-14 13F-HR GEODE CAPITAL MANAGEMENT, LLC 90,941 156,395 71.97 3,864 8,113 109.96
2017-11-14 13F-HR NEXT CENTURY GROWTH INVESTORS LLC 563,870 413,855 -26.60 23,958 21,470 -10.38
2017-11-13 13F-HR NORTHERN TRUST CORP 158,910 187,562 18.03 6,752 9,731 44.12
2017-11-13 13F-HR Bellevue Group AG 23,500 33,400 42.13 999 1,733 73.47
2017-11-13 13F-HR Renaissance Technologies LLC 274,800 202,500 -26.31 11,676 10,506 -10.02
2017-11-13 13F-HR FIRST MERCANTILE TRUST CO 5,200 5,695 9.52 221 295 33.48
2017-11-15 13F-HR Neuberger Berman Group LLC 46,000 21,000 -54.35 1,955 1,089 -44.30
2017-11-14 13F-HR MORGAN STANLEY 62,967 30,278 -51.91 2,675 1,571 -41.27
2017-11-13 13F-HR US BANCORP \DE\ 825 846 2.55 35 44 25.71
2017-11-14 13F-HR ROYAL BANK OF CANADA 949 63,132 6,552.48 41 3,275 7,887.80
2017-11-08 13F-HR COLUMBUS CIRCLE INVESTORS 149,823 113,170 -24.46 6,366 5,871 -7.78
2017-11-13 13F-HR LAZARD ASSET MANAGEMENT LLC 67,475 53,775 -20.30 2,867 2,789 -2.72
2017-11-14 13F-HR MILLENNIUM MANAGEMENT LLC 815,323 323,173 -60.36 34,643 16,766 -51.60
2017-11-14 13F-HR Squarepoint Ops LLC 8,800 0 -100.00 374 0 -100.00
2017-11-13 13F-HR Lebenthal Lisanti Capital Growth, LLC 12,165 15,405 26.63 517 799 54.55
2017-11-14 13F-HR VANGUARD GROUP INC 420,390 732,093 74.15 17,863 37,981 112.62
2017-11-14 13F-HR SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC 260,000 270,000 3.85 11,047 14,008 26.80
2017-11-14 13F-HR Schonfeld Strategic Advisors LLC 9,934 7,875 -20.73 422 409 -3.08
2017-11-14 13F-HR BALYASNY ASSET MANAGEMENT LLC 46,500 45,800 -1.51 1,976 2,376 20.24
2017-11-14 13F-HR New Leaf Venture Partners, L.L.C. 665,965 703,741 5.67 28,291 36,510 29.05
2017-11-14 13F-HR PRICE T ROWE ASSOCIATES INC /MD/ 177,952 170,932 -3.94 7,561 8,868 17.29
2017-11-14 13F-HR FRIESS ASSOCIATES LLC 44,700 41,785 -6.52 1,899 2,168 14.17
2017-11-14 13F-HR Weiss Multi-Strategy Advisers LLC 24,500 20,000 -18.37 1,041 1,038 -0.29
2017-11-13 13F-HR FEDERATED INVESTORS INC /PA/ 114,000 100,000 -12.28 4,844 5,188 7.10
2017-11-09 13F-HR JP MORGAN CHASE & CO 3,200 313,371 9,692.84 135 16,220 11,914.81
2017-11-02 13F-HR TRILLIUM ASSET MANAGEMENT, LLC 17,941 18,238 1.66 762 946 24.15
2017-11-09 13F-HR GREAT WEST LIFE ASSURANCE CO /CAN/ 900 900 0.00 38 46 21.05
2017-11-14 13F-HR MILLENNIUM MANAGEMENT LLC Put 10,000 519
2017-07-06 SC 13G/A New Leaf Ventures II, L.P. 1,813,978
2017-10-23 13F-HR STRS OHIO 0 61,688 0 3,200
2017-11-13 13F-HR Spark Investment Management LLC 12,400 0 -100.00 526 0 -100.00
2017-11-20 13F-HR GSA CAPITAL PARTNERS LLP 6,810 0 -100.00 289 0 -100.00
2017-11-14 13F-HR SUSQUEHANNA INTERNATIONAL GROUP, LLP Put 8,400 11,800 40.48 357 612 71.43
2017-11-14 13F-HR Point72 Asia (Hong Kong) Ltd 23 0 -100.00 1 0 -100.00
2017-11-13 13F-HR Pier Capital, LLC 159,942 146,038 -8.69 6,796 7,576 11.48
2017-11-06 13F-HR Advisor Group, Inc. 338 2,920 763.91 14 151 978.57
2017-11-14 13F-HR BARCLAYS PLC 1,156 319 -72.40 49 17 -65.31
2017-11-13 13F-HR ALLIANCEBERNSTEIN L.P. 883,986 1,002,890 13.45 37,561 52,030 38.52
2017-11-14 13F-HR Broadfin Capital, LLC 52,700 0 -100.00 2,239 0 -100.00
2017-11-14 13F-HR D. E. Shaw & Co., Inc. 35,090 91,011 159.36 1,491 4,722 216.70
2017-11-14 13F-HR Point72 Asset Management, L.P. 602,000 268,451 -55.41 25,579 13,927 -45.55
2017-11-14 13F-HR FIFTH THIRD BANCORP 520 27
2017-11-14 13F-HR BANK OF AMERICA CORP /DE/ 3,061 5,649 84.55 130 293 125.38
2017-11-13 13F-HR Marshall Wace North America L.P. 507,133 297,024 -41.43 21,300 15,445 -27.49
2017-10-19 13F-HR BAROMETER CAPITAL MANAGEMENT INC. 112,100 5,816
2017-11-14 13F-HR PointState Capital LP 522,900 0 -100.00 22,218 0 -100.00
CUSIP: 450056106