Stock Institutional Ownership and Shareholders

SecurityPTI / Proteostasis Therapeutics, Inc. (74373B109)
President and CEOChhabra Meenu
Institutional Owners42
Institutional Shares17,226,282
Outstanding Shares25,093,344 (as of 2017-09-30)
Institutional Value$ 34,912,000 USD

Proteostasis Therapeutics, Inc. (NASDAQ:PTI) has 42 institutional investors and shareholders that have filed 13D/G or 13F forms with the Securities Exchange Commission (SEC). These institutions hold a total of 17,226,282 shares. Largest shareholders include Cormorant Asset Management, LLC, NEA Management Company, LLC, Jennison Associates Llc, Jp Morgan Chase & Co, Hillhouse Capital Management, Ltd., FMR LLC / Fidelity Management & Research, Marshall Wace North America L.P., FIL Ltd, Vanguard Group Inc, and Rock Springs Capital Management LP.



Proteostasis Therapeutics, Inc. (NASDAQ:PTI) 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 Laurion Capital Management LP 95,804 201
2017-11-03 13F-HR NEA Management Company, LLC 3,556,778 3,556,778 0.00 16,646 7,469 -55.13
2017-08-11 13F-HR AMERICAN INTERNATIONAL GROUP INC 3,964 0 -100.00 31 0 -100.00
2017-11-13 13F-HR FIL Ltd 652,316 652,316 0.00 3,053 1,370 -55.13
2017-07-26 13F-HR STRS OHIO 5,000 0 -100.00 39 0 -100.00
2017-08-11 13F-HR NEW YORK STATE COMMON RETIREMENT FUND 8,101 0 -100.00 63 0 -100.00
2017-11-14 13F-HR VANGUARD GROUP INC 413,153 461,173 11.62 1,934 969 -49.90
2017-11-14 13F-HR J. Goldman & Co LP 27,500 27,500 0.00 129 58 -55.04
2017-10-20 13F-HR MEEDER ASSET MANAGEMENT INC 440 1,624 269.09 2 3 50.00
2017-08-03 13F-HR Legal & General Group Plc 1,022 0 -100.00 8 0 -100.00
2017-08-10 13F-HR TIAA CREF INVESTMENT MANAGEMENT LLC 24,664 0 -100.00 193 0 -100.00
2017-11-14 13F-HR PRICE T ROWE ASSOCIATES INC /MD/ 698,924 158,924 -77.26 3,271 334 -89.79
2017-11-14 13F-HR HARBOURVEST PARTNERS LLC 440,627 440,627 0.00 2,062 925 -55.14
2017-10-17 13F-HR Creative Planning 2,000 0 -100.00 9 0 -100.00
2017-11-14 13F-HR BROOKSIDE CAPITAL MANAGEMENT LLC 263,498 368,590 39.88 1,233 774 -37.23
2017-08-11 13F-HR OXFORD ASSET MANAGEMENT 23,606 0 -100.00 185 0 -100.00
2017-11-14 13F-HR Squarepoint Ops LLC 10,891 47,034 331.86 51 99 94.12
2017-11-09 13F-HR LMR Partners LLP 27,277 0 -100.00 127 0 -100.00
2017-11-13 13F-HR SCHWAB CHARLES INVESTMENT MANAGEMENT INC 18,300 18,300 0.00 86 39 -54.65
2017-11-13 13F-HR DEERFIELD MANAGEMENT CO 17,251 0 -100.00 81 0 -100.00
2017-11-13 13F-HR MUFG Americas Holdings Corp 526 990 88.21 2 2 0.00
2017-11-09 13F-HR TD ASSET MANAGEMENT INC 25,300 0 -100.00 118 0 -100.00
2017-11-14 13F-HR Tower Research Capital LLC (TRC) 7,509 12,117 61.37 35 26 -25.71
2017-08-15 13F-HR Ameritas Investment Partners, Inc. 494 0 -100.00 4 0 -100.00
2017-11-14 13F-HR BARCLAYS PLC 17,861 0 -100.00 84 0 -100.00
2017-07-18 13F-HR Cribstone Capital Management, LLC 150 0 -100.00 1 0 -100.00
2017-11-14 13F-HR GOLDMAN SACHS GROUP INC 51,911 0 -100.00 243 0 -100.00
2017-11-15 13F-HR CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 41,200 41,200 0.00 193 87 -54.92
2017-11-13 13F-HR NORTHERN TRUST CORP 37,492 34,292 -8.54 175 72 -58.86
2017-11-03 13F-HR JENNISON ASSOCIATES LLC 2,075,439 2,070,936 -0.22 9,713 4,349 -55.22
2017-11-03 13F-HR Candriam Luxembourg S.C.A. 75,000 75,000 0.00 351 158 -54.99
2017-11-14 13F-HR Cormorant Asset Management, LLC 3,804,027 3,804,027 0.00 17,803 7,988 -55.13
2017-11-14 13F-HR UBS Group AG 86 71 -17.44 0 0
2017-11-14 13F-HR Paloma Partners Management Co 29,200 0 -100.00 137 0 -100.00
2017-08-15 13F-HR CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 16,083 0 -100.00 126 0 -100.00
2017-11-13 13F-HR DIMENSIONAL FUND ADVISORS LP 63,153 48,531 -23.15 296 102 -65.54
2017-11-13 13F-HR Marshall Wace North America L.P. 684,124 684,124 0.00 3,421 1,368 -60.01
2017-08-03 13F-HR BNP PARIBAS ARBITRAGE, SA 137 0 -100.00 1,071 0 -100.00
2017-11-14 13F-HR TWO SIGMA INVESTMENTS LLC 0 16,962 0 36
2017-08-03 13F-HR ADAMS STREET PARTNERS LLC 158,925 0 -100.00 1,243 0 -100.00
2017-08-10 13F-HR TEACHERS ADVISORS INC 16,007 0 -100.00 125 0 -100.00
2017-11-14 13F-HR BRIDGEWAY CAPITAL MANAGEMENT INC 59,500 109,500 84.03 278 230 -17.27
2017-11-13 13F-HR ELEMENT CAPITAL MANAGEMENT LLC 65,973 0 -100.00 309 0 -100.00
2017-11-13 13F-HR FRANKLIN RESOURCES INC 243,400 243,400 0.00 1,139 511 -55.14
2017-11-09 13F-HR JP MORGAN CHASE & CO 214,052 1,124,602 425.39 1,001 2,361 135.86
2017-11-14 13F-HR SABBY MANAGEMENT, LLC 125,151 150,151 19.98 586 315 -46.25
2017-11-14 13F-HR MORGAN STANLEY 10,880 99,066 810.53 51 208 307.84
2017-11-13 13F-HR CITIGROUP INC 1 0 -100.00 0 0
2017-08-01 13F-HR Trexquant Investment LP 19,790 0 -100.00 155 0 -100.00
2017-11-14 13F-HR DEUTSCHE BANK AG\ 20 126,307 631,435.00 0 265
2017-11-14 13F-HR ROYAL BANK OF CANADA 298 9 -96.98 2 0 -100.00
2017-08-14 13F-HR SPRINGBOK CAPITAL MANAGEMENT, LLC 500 0 -100.00 4 0 -100.00
2017-08-09 13F-HR/A-1 NORGES BANK 58,300 58,300 0.00 562 707 25.80
2017-11-14 13F-HR SUSQUEHANNA INTERNATIONAL GROUP, LLP 54,206 0 -100.00 254 0 -100.00
2017-11-14 13F-HR A.R.T. Advisors, LLC 28,837 37,326 29.44 134 78 -41.79
2017-11-14 13F-HR Hillhouse Capital Management, Ltd. 865,923 865,923 0.00 4,053 1,818 -55.14
2017-11-14 13F-HR Rock Springs Capital Management LP 450,000 450,000 0.00 2,106 945 -55.13
2017-08-10 13F-HR Nationwide Fund Advisors 4,576 0 -100.00 36 0 -100.00
2017-11-14 13F-HR BANK OF AMERICA CORP /DE/ 2,468 999 -59.52 12 2 -83.33
2017-11-14 13F-HR BlackRock Inc. 43,764 40,297 -7.92 204 85 -58.33
2017-11-09 13F-HR WELLS FARGO & COMPANY/MN 3,000 10,665 255.50 14 23 64.29
2017-11-13 13F-HR PNC FINANCIAL SERVICES GROUP, INC. 2,001 0 -100.00 9 0 -100.00
2017-11-14 13F-HR GEODE CAPITAL MANAGEMENT, LLC 76,292 76,292 0.00 357 160 -55.18
2017-08-17 13F-HR Dynamic Technology Lab Private Ltd 14,343 0 -100.00 112 0 -100.00
2017-08-11 13F-HR KCG HOLDINGS, INC. 12,635 59
2017-05-15 13F-HR BALYASNY ASSET MANAGEMENT LLC 95,855 0 -100.00 1,175 0 -100.00
2017-11-14 13F-HR Walleye Trading LLC 37,642 0 -100.00 176 0 -100.00
2017-05-15 13F-HR Opaleye Management Inc. 150,000 0 -100.00 1,839 0 -100.00
2017-11-14 13F-HR CREDIT SUISSE AG/ 15,616 0 -100.00 73 0 -100.00
2017-08-14 13F-HR VIRTUS ETF ADVISERS LLC 26,731 0 -100.00 209 0 -100.00
2017-11-06 13F-HR Bank of New York Mellon Corp 23,833 23,833 0.00 112 50 -55.36
2017-08-14 13F-HR EVENTIDE ASSET MANAGEMENT, LLC 108,000 0 -100.00 845 0 -100.00
2017-10-10 SC 13G/A FMR LLC / Fidelity Management & Research 2,878,804 863,163 -70.02
2017-11-14 13F-HR MANUFACTURERS LIFE INSURANCE COMPANY, THE 722 0 -100.00 3 0 -100.00
2017-11-13 13F-HR Renaissance Technologies LLC 0 138,400 0 291
2017-11-14 13F-HR MILLENNIUM MANAGEMENT LLC 114,752 178,494 55.55 537 375 -30.17
2017-08-04 13F-HR FEDERATED INVESTORS INC /PA/ 212 0 -100.00 2 0 -100.00
2017-08-14 13F-HR Magnetar Financial LLC 10,976 0 -100.00 86 0 -100.00
2017-08-14 13F-HR STATE STREET CORP 97,167 0 -100.00 760 0 -100.00
2017-11-09 13F-HR FNY Partners Fund LP 20,127 0 -100.00 94 0 -100.00
2017-08-04 13F-HR MARSHALL WACE ASIA Ltd 743,296 0 -100.00 5,946 0 -100.00
CUSIP: 74373B109