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MARSHALL WACE, LLP
> RGEN
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | REPLIGEN CORP | RGEN | 449,488 | 386,337 | 63,584,571,000 | 52,892,475,000 | $141,460.00 |
| 12/31/2022 | REPLIGEN CORP | RGEN | 63,151 | -131,164 | 10,692,096,000 | 10,655,737,000 | $169,310.00 |
| 09/30/2022 | REPLIGEN CORP | RGEN | 194,315 | -178,562 | 36,359,000 | -24,195,000 | $187.11 |
| 06/30/2022 | REPLIGEN CORP | RGEN | 372,877 | 8,630 | 60,554,000 | -7,957,000 | $162.40 |
| 03/31/2022 | REPLIGEN CORP | RGEN | 364,247 | -10,386 | 68,511,000 | -30,706,000 | $188.09 |
| 12/31/2021 | REPLIGEN CORP | RGEN | 374,633 | -145,497 | 99,217,000 | -51,095,000 | $264.84 |
| 09/30/2021 | REPLIGEN CORP | RGEN | 520,130 | -182,784 | 150,312,000 | 9,997,000 | $288.99 |
| 06/30/2021 | REPLIGEN CORP | RGEN | 702,914 | -240,810 | 140,315,000 | -43,156,000 | $199.62 |
| 03/31/2021 | REPLIGEN CORP | RGEN | 943,724 | -537,556 | 183,471,000 | -100,386,000 | $194.41 |
| 12/31/2020 | REPLIGEN CORP | RGEN | 1,481,280 | 573,604 | 283,857,000 | 149,938,000 | $191.63 |
| 09/30/2020 | REPLIGEN CORP | RGEN | 907,676 | 264,563 | 133,919,000 | 54,424,000 | $147.54 |
| 06/30/2020 | REPLIGEN CORP | RGEN | 643,113 | 78,601 | 79,495,000 | 24,997,000 | $123.61 |
| 03/31/2020 | REPLIGEN CORP | RGEN | 564,512 | 564,512 | 54,498,000 | 54,498,000 | $96.54 |
| 12/31/2019 | REPLIGEN CORP | RGEN | 0 | -6,385 | 0 | -490,000 | |
| 09/30/2019 | REPLIGEN CORP | RGEN | 6,385 | -103,501 | 490,000 | -8,955,000 | $76.74 |
| 06/30/2019 | REPLIGEN CORP | RGEN | 109,886 | 109,886 | 9,445,000 | 9,445,000 | $85.95 |
| 03/31/2019 | REPLIGEN CORP | RGEN | 0 | -4,165 | 0 | -219,000 | |
| 12/31/2018 | REPLIGEN CORP | RGEN | 4,165 | 4,165 | 219,000 | 219,000 | $52.58 |
| 03/31/2017 | REPLIGEN CORP | RGEN | 0 | -339,257 | 0 | -10,456,000 | |
| 12/31/2016 | REPLIGEN CORP | RGEN | 339,257 | -16,641 | 10,456,000 | -289,000 | $30.82 |
| 09/30/2016 | REPLIGEN CORP | RGEN | 355,898 | 283,746 | 10,745,000 | 8,771,000 | $30.19 |
| 06/30/2016 | REPLIGEN CORP | RGEN | 72,152 | 72,152 | 1,974,000 | 1,974,000 | $27.36 |
| 06/30/2015 | REPLIGEN CORP | RGEN | 0 | -116,524 | 0 | -3,538,000 | |
| 03/31/2015 | REPLIGEN CORP | RGEN | 116,524 | 116,524 | 3,538,000 | 3,538,000 | $30.36 |
| 12/31/2014 | REPLIGEN CORP | RGEN | 271,005 | 271,005 | 5,366,000 | 5,366,000 | $19.80 |
| 09/30/2014 | REPLIGEN CORP | RGEN | 206,241 | 206,241 | 4,106,000 | 4,106,000 | $19.91 |
| 06/30/2014 | REPLIGEN CORP | RGEN | 176,021 | 176,021 | 4,012,000 | 4,012,000 | $22.79 |
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