HoldingsChannel.com
On this page, we present all of the funds holding MCRB from our database of 13F filers, detailed in the table below. The first column indicates the name of each of the funds holding MCRB, with a link to that fund's top holdings. The next columns indicate the amount of MCRB stock held by each of the funds holding MCRB, followed by the MCRB position size held by the fund, and lastly the date of the quarterly filing period the data represents. In total, we count 104 funds holding MCRB within the last two filing periods in our coverage universe of 13F filers, with the largest position size having been reported by Flagship Pioneering Inc.. For more details on the positions held by Flagship Pioneering Inc. (or by any of the other funds holding MCRB), click the fund name in the "Holder" column of the funds-holding-MCRB table below.
| Holder | Amount | Position Size ($ in 1000's) | As of |
|---|---|---|---|
 Flagship Pioneering Inc. | 23,117,045 | $32,434 | 12/31/2023 |
| MCRB | 23,117,045 | $32,434 | 12/31/2023 |
| FMR LLC | 19,388,580 | $27,144 | 12/31/2023 |
| MCRB | 19,388,580 | $27,144 | 12/31/2023 |
| BlackRock Inc. | 7,339,454 | $10,275 | 12/31/2023 |
| MCRB | 7,339,454 | $10,275 | 12/31/2023 |
| Vanguard Group Inc. | 6,005,307 | $8,407 | 12/31/2023 |
| MCRB | 6,005,307 | $8,407 | 12/31/2023 |
| Hudson Bay Capital Management LP | 4,320,400 | $6,049 | 12/31/2023 |
| MCRB | 4,320,400 | $6,049 | 12/31/2023 |
| Bank of America Corp DE | 2,362,449 | $3,307 | 12/31/2023 |
| MCRB | 2,362,449 | $3,307 | 12/31/2023 |
| Millennium Management LLC | 2,224,075 | $3,114 | 12/31/2023 |
| MCRB | 2,224,075 | $3,114 | 12/31/2023 |
| Point72 Asset Management L.P. | 2,150,000 | $3,010 | 12/31/2023 |
| MCRB | 2,150,000 | $3,010 | 12/31/2023 |
| Geode Capital Management LLC | 2,094,039 | $2,932 | 12/31/2023 |
| MCRB | 2,094,039 | $2,932 | 12/31/2023 |
| State Street Corp | 1,909,524 | $2,673 | 12/31/2023 |
| MCRB | 1,909,524 | $2,673 | 12/31/2023 |
| Tang Capital Management LLC | 1,792,888 | $2,510 | 12/31/2023 |
| MCRB | 1,792,888 | $2,510 | 12/31/2023 |
| Eversept Partners LP | 1,753,538 | $2,455 | 12/31/2023 |
| MCRB | 1,753,538 | $2,455 | 12/31/2023 |
 Susquehanna International Group LLP | $1,952 | 12/31/2023 | |
| MCRB | 1,411,050 | $1,975 | 12/31/2023 |
| Put | 42,500 | $60 | 12/31/2023 |
| Call | 26,500 | $37 | 12/31/2023 |
| Woodline Partners LP | 1,290,276 | $1,806 | 12/31/2023 |
| MCRB | 1,290,276 | $1,806 | 12/31/2023 |
| Handelsbanken Fonder AB | 1,100,000 | $1,540 | 12/31/2023 |
| MCRB | 1,100,000 | $1,540 | 12/31/2023 |
| Morgan Stanley | 885,336 | $1,239 | 12/31/2023 |
| MCRB | 885,336 | $1,239 | 12/31/2023 |
| Renaissance Technologies LLC | 817,000 | $1,144 | 12/31/2023 |
| MCRB | 817,000 | $1,144 | 12/31/2023 |
| Northern Trust Corp | 770,611 | $1,079 | 12/31/2023 |
| MCRB | 770,611 | $1,079 | 12/31/2023 |
| Charles Schwab Investment Management Inc. | 676,387 | $947 | 12/31/2023 |
| MCRB | 676,387 | $947 | 12/31/2023 |
| Qube Research & Technologies Ltd | 640,655 | $897 | 12/31/2023 |
| MCRB | 640,655 | $897 | 12/31/2023 |
| Goldman Sachs Group Inc. | 435,862 | $610 | 12/31/2023 |
| MCRB | 435,862 | $610 | 12/31/2023 |
| XTX Topco Ltd | 402,506 | $564 | 12/31/2023 |
| MCRB | 402,506 | $564 | 12/31/2023 |
| Advisor Group Holdings Inc. | 400,493 | $561 | 12/31/2023 |
| MCRB | 400,493 | $561 | 12/31/2023 |
| HRT Financial LP | 393,760 | $551 | 12/31/2023 |
| MCRB | 393,760 | $551 | 12/31/2023 |
| Knott David M Jr | 370,730 | $519 | 12/31/2023 |
| MCRB | 370,730 | $519 | 12/31/2023 |
| Price T Rowe Associates Inc. MD | 363,650 | $510 | 12/31/2023 |
| MCRB | 363,650 | $510 | 12/31/2023 |
| Two Sigma Investments LP | 349,588 | $489 | 12/31/2023 |
| MCRB | 349,588 | $489 | 12/31/2023 |
| Bank of New York Mellon Corp | 344,323 | $482 | 12/31/2023 |
| MCRB | 344,323 | $482 | 12/31/2023 |
| Sit Investment Associates Inc. | 342,200 | $479 | 12/31/2023 |
| MCRB | 342,200 | $479 | 12/31/2023 |
| Lion Point Capital LP | 340,761 | $477 | 12/31/2023 |
| MCRB | 340,761 | $477 | 12/31/2023 |
| Jacobs Levy Equity Management Inc. | 324,209 | $454 | 12/31/2023 |
| MCRB | 324,209 | $454 | 12/31/2023 |
| Pennant Investors LP | 292,300 | $409 | 12/31/2023 |
| MCRB | 292,300 | $409 | 12/31/2023 |
| Jane Street Group LLC | 290,287 | $406 | 12/31/2023 |
| MCRB | 290,287 | $406 | 12/31/2023 |
| Parallax Volatility Advisers L.P. | $256 | 12/31/2023 | |
| Call | 176,000 | $246 | 12/31/2023 |
| MCRB | 43,163 | $60 | 12/31/2023 |
| Put | 36,000 | $50 | 12/31/2023 |
| D. E. Shaw & Co. Inc. | 168,518 | $236 | 12/31/2023 |
| MCRB | 168,518 | $236 | 12/31/2023 |
| Graham Capital Management L.P. | 161,308 | $226 | 12/31/2023 |
| MCRB | 161,308 | $226 | 12/31/2023 |
| Rhumbline Advisers | 137,519 | $193 | 12/31/2023 |
| MCRB | 137,519 | $193 | 12/31/2023 |
| Barclays PLC | 135,178 | $189 | 12/31/2023 |
| MCRB | 135,178 | $189 | 12/31/2023 |
| Group One Trading L.P. | $188 | 12/31/2023 | |
| MCRB | 71,259 | $100 | 12/31/2023 |
| Call | 64,800 | $91 | 12/31/2023 |
| Put | 2,000 | $3 | 12/31/2023 |
| Alliancebernstein L.P. | 127,660 | $179 | 12/31/2023 |
| MCRB | 127,660 | $179 | 12/31/2023 |
| LPL Financial LLC | 115,530 | $162 | 12/31/2023 |
| MCRB | 115,530 | $162 | 12/31/2023 |
| Squarepoint Ops LLC | 114,000 | $160 | 12/31/2023 |
| MCRB | 114,000 | $160 | 12/31/2023 |
| Acadian Asset Management LLC | 100,812 | $141 | 12/31/2023 |
| MCRB | 100,812 | $141 | 12/31/2023 |
| Citigroup Inc. | $124 | 12/31/2023 | |
| MCRB | 88,329 | $124 | 12/31/2023 |
| Put | 74,900 | $105 | 12/31/2023 |
| Call | 74,900 | $105 | 12/31/2023 |
| Janney Montgomery Scott LLC | 75,098 | $105 | 12/31/2023 |
| MCRB | 75,098 | $105 | 12/31/2023 |
| Y Intercept Hong Kong Ltd | 71,523 | $100 | 12/31/2023 |
| MCRB | 71,523 | $100 | 12/31/2023 |
| JPMorgan Chase & Co. | 66,016 | $92 | 12/31/2023 |
| MCRB | 66,016 | $92 | 12/31/2023 |
| Tudor Investment Corp Et Al | 61,977 | $87 | 12/31/2023 |
| MCRB | 61,977 | $87 | 12/31/2023 |
| Principal Financial Group Inc. | 61,664 | $86 | 12/31/2023 |
| MCRB | 61,664 | $86 | 12/31/2023 |
| ExodusPoint Capital Management LP | 60,749 | $85 | 12/31/2023 |
| MCRB | 60,749 | $85 | 12/31/2023 |
| Simplex Trading LLC | $82 | 12/31/2023 | |
| MCRB | 45,311 | $63 | 12/31/2023 |
| Call | 20,100 | $28 | 12/31/2023 |
| Put | 6,600 | $9 | 12/31/2023 |
| BNP Paribas Arbitrage SA | 58,045 | $81 | 12/31/2023 |
| MCRB | 58,045 | $81 | 12/31/2023 |
| Invesco Ltd. | 57,000 | $80 | 12/31/2023 |
| MCRB | 57,000 | $80 | 12/31/2023 |
| Balyasny Asset Management LLC | 55,011 | $77 | 12/31/2023 |
| MCRB | 55,011 | $77 | 12/31/2023 |
| SG Americas Securities LLC | 52,080 | $73 | 12/31/2023 |
| MCRB | 52,080 | $73 | 12/31/2023 |
| Wolverine Trading LLC | $72 | 12/31/2023 | |
| Call | 51,700 | $72 | 12/31/2023 |
| Edgewood Management LLC | 50,000 | $70 | 12/31/2023 |
| MCRB | 50,000 | $70 | 12/31/2023 |
| HarbourVest Partners LLC | 49,363 | $69 | 12/31/2023 |
| MCRB | 49,363 | $69 | 12/31/2023 |
| American International Group Inc. | 48,352 | $68 | 12/31/2023 |
| MCRB | 48,352 | $68 | 12/31/2023 |
| Voya Investment Management LLC | 40,532 | $57 | 12/31/2023 |
| MCRB | 40,532 | $57 | 12/31/2023 |
| Ironwood Investment Management LLC | 40,593 | $57 | 12/31/2023 |
| MCRB | 40,593 | $57 | 12/31/2023 |
| Walleye Capital LLC | 39,948 | $56 | 12/31/2023 |
| MCRB | 39,948 | $56 | 12/31/2023 |
| Point72 Middle East FZE | 39,004 | $55 | 12/31/2023 |
| MCRB | 39,004 | $55 | 12/31/2023 |
| New York State Common Retirement Fund | 38,807 | $54 | 12/31/2023 |
| MCRB | 38,807 | $54 | 12/31/2023 |
| Tower Research Capital LLC TRC | 38,091 | $53 | 12/31/2023 |
| MCRB | 38,091 | $53 | 12/31/2023 |
| Royal Bank of Canada | 30,942 | $43 | 12/31/2023 |
| MCRB | 30,942 | $43 | 12/31/2023 |
| State Board of Administration of Florida Retirement System | 29,158 | $41 | 12/31/2023 |
| MCRB | 29,158 | $41 | 12/31/2023 |
| Wells Fargo & Company MN | 27,992 | $39 | 12/31/2023 |
| MCRB | 27,992 | $39 | 12/31/2023 |
| AQR Capital Management LLC | 27,662 | $39 | 12/31/2023 |
| MCRB | 27,662 | $39 | 12/31/2023 |
| Clear Creek Financial Management LLC | 26,950 | $38 | 12/31/2023 |
| MCRB | 26,950 | $38 | 12/31/2023 |
| Arete Wealth Advisors LLC | 24,700 | $35 | 12/31/2023 |
| MCRB | 24,700 | $35 | 12/31/2023 |
| Quantbot Technologies LP | 24,600 | $34 | 12/31/2023 |
| MCRB | 24,600 | $34 | 12/31/2023 |
| Kestra Advisory Services LLC | 21,631 | $30 | 12/31/2023 |
| MCRB | 21,631 | $30 | 12/31/2023 |
| Wexford Capital LP | 20,440 | $29 | 12/31/2023 |
| MCRB | 20,440 | $29 | 12/31/2023 |
| Stifel Financial Corp | 20,000 | $28 | 12/31/2023 |
| MCRB | 20,000 | $28 | 12/31/2023 |
| The Manufacturers Life Insurance Company | 18,639 | $26 | 12/31/2023 |
| MCRB | 18,639 | $26 | 12/31/2023 |
| Russell Investments Group Ltd. | 18,300 | $26 | 12/31/2023 |
| MCRB | 18,300 | $26 | 12/31/2023 |
| PFG Investments LLC | 31,443 | $24 | 03/31/2024 |
| MCRB | 31,443 | $24 | 03/31/2024 |
| Vontobel Holding Ltd. | 17,000 | $24 | 12/31/2023 |
| MCRB | 17,000 | $24 | 12/31/2023 |
| Auour Investments LLC | 17,000 | $24 | 12/31/2023 |
| MCRB | 17,000 | $24 | 12/31/2023 |
| ProShare Advisors LLC | 16,099 | $23 | 12/31/2023 |
| MCRB | 16,099 | $23 | 12/31/2023 |
| California State Teachers Retirement System | 16,011 | $22 | 12/31/2023 |
| MCRB | 16,011 | $22 | 12/31/2023 |
| HighTower Advisors LLC | 16,005 | $22 | 12/31/2023 |
| MCRB | 16,005 | $22 | 12/31/2023 |
| Creative Planning | 15,304 | $21 | 12/31/2023 |
| MCRB | 15,304 | $21 | 12/31/2023 |
| Legal & General Group Plc | 14,489 | $20 | 12/31/2023 |
| MCRB | 14,489 | $20 | 12/31/2023 |
| Victory Capital Management Inc. | 13,135 | $18 | 12/31/2023 |
| MCRB | 13,135 | $18 | 12/31/2023 |
| Citadel Advisors LLC | $18 | 12/31/2023 | |
| Call | 74,000 | $104 | 12/31/2023 |
| Put | 62,700 | $88 | 12/31/2023 |
| MCRB | 1,083 | $2 | 12/31/2023 |
| Aries Wealth Management | 12,000 | $17 | 12/31/2023 |
| MCRB | 12,000 | $17 | 12/31/2023 |
| Amalgamated Bank | 11,122 | $16 | 12/31/2023 |
| MCRB | 11,122 | $16 | 12/31/2023 |
| Dark Forest Capital Management LP | 10,016 | $14 | 12/31/2023 |
| MCRB | 10,016 | $14 | 12/31/2023 |
| Ameritas Investment Partners Inc. | 8,033 | $11 | 12/31/2023 |
| MCRB | 8,033 | $11 | 12/31/2023 |
| UBS Group AG | 8,050 | $11 | 12/31/2023 |
| MCRB | 8,050 | $11 | 12/31/2023 |
| Deutsche Bank AG | 6,203 | $9 | 12/31/2023 |
| MCRB | 6,203 | $9 | 12/31/2023 |
| Diversified Trust Co | 10,000 | $8 | 03/31/2024 |
| MCRB | 10,000 | $8 | 03/31/2024 |
| Macroview Investment Management LLC | 5,750 | $8 | 12/31/2023 |
| MCRB | 5,750 | $8 | 12/31/2023 |
| Point72 Asia Singapore Pte. Ltd. | 2,856 | $4 | 12/31/2023 |
| MCRB | 2,856 | $4 | 12/31/2023 |
| Providence Wealth Advisors LLC | 675 | $1 | 12/31/2023 |
| MCRB | 675 | $1 | 12/31/2023 |
| Orion Capital Management LLC | 1,000 | $1 | 12/31/2023 |
| MCRB | 1,000 | $1 | 12/31/2023 |
| CWM LLC | 108 | $0 | 03/31/2024 |
| MCRB | 108 | $0 | 03/31/2024 |
| Sound Income Strategies LLC | 175 | $0 | 03/31/2024 |
| MCRB | 175 | $0 | 03/31/2024 |
| The PNC Financial Services Group Inc. | 348 | $0 | 12/31/2023 |
| MCRB | 348 | $0 | 12/31/2023 |
| Proequities Inc. | $0 | 12/31/2023 | |
| Put | 0 | $0 | 12/31/2023 |
| Call | 0 | $0 | 12/31/2023 |
| MCRB | 0 | $0 | 12/31/2023 |
| Sandy Spring Bank | 345 | $0 | 12/31/2023 |
| MCRB | 345 | $0 | 12/31/2023 |
| Larson Financial Group LLC | 235 | $0 | 12/31/2023 |
| MCRB | 235 | $0 | 12/31/2023 |
| Farther Finance Advisors LLC | 3 | $0 | 12/31/2023 |
| MCRB | 3 | $0 | 12/31/2023 |
See Summary: Institutional Holders of MCRB
See Details: Top 10 Hedge Funds Holding MCRB
Also See: MCRB Insider Buying
Also See: MCRB Holdings Changes
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