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On this page, we present all of the funds holding PIRS from our database of 13F filers, detailed in the table below.
The first column indicates the name of each of the funds holding PIRS, with a link to that fund's top holdings. The next columns
indicate the amount of PIRS stock held by each of the funds holding PIRS, followed by the PIRS position size held by the fund, and lastly the
date of the quarterly filing period the data represents. In total, we count 46 funds holding PIRS within the last two filing periods in our coverage universe of 13F filers,
with the largest position size having been reported by BVF Inc. IL. For more details on the positions held by BVF Inc. IL
(or by any of the other funds holding PIRS), click the fund name in the "Holder" column of the funds-holding-PIRS table below.
| Holder | Amount | Position Size
($ in 1000's) | As of |
|---|
 BVF Inc. IL | 20,609,863 | $3,751 | 12/31/2023 | | PIRS | 20,609,863 | $3,751 | 12/31/2023 | | Lynx1 Capital Management LP | 9,775,849 | $1,779 | 12/31/2023 | | PIRS | 9,775,849 | $1,779 | 12/31/2023 |  Citadel Advisors LLC | | $228 | 12/31/2023 | | PIRS | 1,189,887 | $217 | 12/31/2023 | | Call | 64,800 | $12 | 12/31/2023 | | Put | 4,300 | $1 | 12/31/2023 | | Renaissance Technologies LLC | 1,065,007 | $194 | 12/31/2023 | | PIRS | 1,065,007 | $194 | 12/31/2023 | | BlackRock Inc. | 1,037,747 | $189 | 12/31/2023 | | PIRS | 1,037,747 | $189 | 12/31/2023 | | Acadian Asset Management LLC | 962,358 | $174 | 12/31/2023 | | PIRS | 962,358 | $174 | 12/31/2023 | | Vanguard Group Inc. | 907,390 | $165 | 12/31/2023 | | PIRS | 907,390 | $165 | 12/31/2023 | | Geode Capital Management LLC | 761,444 | $139 | 12/31/2023 | | PIRS | 761,444 | $139 | 12/31/2023 | | CM Management LLC | 750,000 | $136 | 12/31/2023 | | PIRS | 750,000 | $136 | 12/31/2023 | | Northern Trust Corp | 243,592 | $44 | 12/31/2023 | | PIRS | 243,592 | $44 | 12/31/2023 | | State Street Corp | 222,819 | $41 | 12/31/2023 | | PIRS | 222,819 | $41 | 12/31/2023 | | Millennium Management LLC | 166,685 | $30 | 12/31/2023 | | PIRS | 166,685 | $30 | 12/31/2023 | | Prudential Financial Inc. | 110,200 | $20 | 12/31/2023 | | PIRS | 110,200 | $20 | 12/31/2023 | | Susquehanna International Group LLP | 102,971 | $19 | 12/31/2023 | | PIRS | 102,971 | $19 | 12/31/2023 | | Citigroup Inc. | 88,585 | $16 | 12/31/2023 | | PIRS | 88,585 | $16 | 12/31/2023 | | Virtu Financial LLC | 90,059 | $16 | 12/31/2023 | | PIRS | 90,059 | $16 | 12/31/2023 | | Two Sigma Investments LP | 40,914 | $7 | 12/31/2023 | | PIRS | 40,914 | $7 | 12/31/2023 | | Bank of New York Mellon Corp | 39,949 | $7 | 12/31/2023 | | PIRS | 39,949 | $7 | 12/31/2023 | | XTX Topco Ltd | 39,689 | $7 | 12/31/2023 | | PIRS | 39,689 | $7 | 12/31/2023 | | NorthStar Asset Management LLC NJ | 39,065 | $7 | 12/31/2023 | | PIRS | 39,065 | $7 | 12/31/2023 | | Two Sigma Advisers LP | 34,600 | $6 | 12/31/2023 | | PIRS | 34,600 | $6 | 12/31/2023 | | Raymond James & Associates | 30,000 | $5 | 12/31/2023 | | PIRS | 30,000 | $5 | 12/31/2023 | | NJ State Employees Deferred Compensation Plan | 30,000 | $5 | 12/31/2023 | | PIRS | 30,000 | $5 | 12/31/2023 | | Goldman Sachs Group Inc. | 22,633 | $4 | 12/31/2023 | | PIRS | 22,633 | $4 | 12/31/2023 | | Commerce Bank | 20,000 | $4 | 12/31/2023 | | PIRS | 20,000 | $4 | 12/31/2023 | | Baader Bank INC | 20,300 | $4 | 12/31/2023 | | PIRS | 20,300 | $4 | 12/31/2023 | | Hudson Valley Investment Advisors Inc. ADV | 14,000 | $3 | 03/31/2024 | | PIRS | 14,000 | $3 | 03/31/2024 | | Two Sigma Securities LLC | 15,415 | $3 | 12/31/2023 | | PIRS | 15,415 | $3 | 12/31/2023 | | Kestra Advisory Services LLC | 17,500 | $3 | 12/31/2023 | | PIRS | 17,500 | $3 | 12/31/2023 | | US Bancorp DE | 10,280 | $2 | 12/31/2023 | | PIRS | 10,280 | $2 | 12/31/2023 | | Cerity Partners LLC | 10,300 | $2 | 12/31/2023 | | PIRS | 10,300 | $2 | 12/31/2023 | | Wells Fargo & Company MN | 4,761 | $1 | 12/31/2023 | | PIRS | 4,761 | $1 | 12/31/2023 | | Barclays PLC | 5,006 | $1 | 12/31/2023 | | PIRS | 5,006 | $1 | 12/31/2023 | | Morgan Stanley | 6,856 | $1 | 12/31/2023 | | PIRS | 6,856 | $1 | 12/31/2023 | | Group One Trading L.P. | | $1 | 12/31/2023 | | PIRS | 6,730 | $1 | 12/31/2023 | | Call | 1,400 | $0 | 12/31/2023 | | Tower Research Capital LLC TRC | 8,116 | $1 | 12/31/2023 | | PIRS | 8,116 | $1 | 12/31/2023 | | Cutler Group LP | 4,500 | $1 | 12/31/2023 | | PIRS | 4,500 | $1 | 12/31/2023 | | UBS Group AG | 6,280 | $1 | 12/31/2023 | | PIRS | 6,280 | $1 | 12/31/2023 | | 1620 Investment Advisors Inc. | 4,421 | $1 | 12/31/2023 | | PIRS | 4,421 | $1 | 12/31/2023 | | JPMorgan Chase & Co. | 1,971 | $0 | 12/31/2023 | | PIRS | 1,971 | $0 | 12/31/2023 | | Bank of America Corp DE | 145 | $0 | 12/31/2023 | | PIRS | 145 | $0 | 12/31/2023 | | Proequities Inc. | | $0 | 12/31/2023 | | Put | 0 | $0 | 12/31/2023 | | Call | 0 | $0 | 12/31/2023 | | PIRS | 0 | $0 | 12/31/2023 | | Royal Bank of Canada | 572 | $0 | 12/31/2023 | | PIRS | 572 | $0 | 12/31/2023 | | Rhumbline Advisers | 1,866 | $0 | 12/31/2023 | | PIRS | 1,866 | $0 | 12/31/2023 | | Allworth Financial LP | 350 | $0 | 12/31/2023 | | PIRS | 350 | $0 | 12/31/2023 | | Advisor Group Holdings Inc. | 516 | $0 | 12/31/2023 | | PIRS | 516 | $0 | 12/31/2023 | | Truvestments Capital LLC | 1,120 | $0 | 12/31/2023 | | PIRS | 1,120 | $0 | 12/31/2023 |
See Summary: Institutional Holders of PIRS
See Details: Top 10 Hedge Funds Holding PIRS
Also See: PIRS Insider Buying
Also See: PIRS Holdings Changes
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