CIK: 0001026710 | WALTHAM, MA
| Quarter | Form Type | Holdings | Value | Filed | SEC |
|---|---|---|---|---|---|
| 13F-HR | 150 | $2.8B | 2026-08-14 | SEC ↗ | |
| 13F-HR | 149 | $2.1B | 2026-05-15 | SEC ↗ | |
| 13F-HR | 157 | $2.3B | 2026-02-17 | SEC ↗ | |
| 13F-HR | 146 | $2.4B | 2025-11-14 | SEC ↗ | |
| 13F-HR | 153 | $2.5B | 2025-08-14 | SEC ↗ | |
| 13F-HR | 159 | $2.0B | 2025-05-15 | SEC ↗ | |
| 13F-HR | 180 | $2.4B | 2025-02-14 | SEC ↗ | |
| 13F-HR | 187 | $2.5B | 2024-11-14 | SEC ↗ | |
| 13F-HR | 180 | $2.5B | 2024-08-14 | SEC ↗ | |
| 13F-HR | 181 | $2.8B | 2024-05-15 | SEC ↗ | |
| 13F-HR | 180 | $3.0B | 2024-02-14 | SEC ↗ | |
| 13F-HR | 183 | $2.8B | 2023-11-14 | SEC ↗ | |
| 13F-HR | 175 | $3.2B | 2023-08-14 | SEC ↗ | |
| 13F-HR | 165 | $3.3B | 2023-05-15 | SEC ↗ | |
| 13F-HR | 170 | $3.3B | 2023-02-14 | SEC ↗ | |
| 13F-HR | 176 | $600.3M | 2022-11-14 | SEC ↗ | |
| 13F-HR | 172 | $603.1M | 2022-08-15 | SEC ↗ | |
| 13F-HR | 178 | $867.2M | 2022-05-16 | SEC ↗ | |
| 13F-HR | 186 | $913.5M | 2022-02-14 | SEC ↗ | |
| 13F-HR | 193 | $1.1B | 2021-11-15 | SEC ↗ | |
| 13F-HR | 193 | $1.1B | 2021-08-16 | SEC ↗ | |
| 13F-HR | 191 | $824.4M | 2021-05-17 | SEC ↗ | |
| 13F-HR | 192 | $672.8M | 2021-02-12 | SEC ↗ | |
| 13F-HR | 180 | $472.6M | 2020-11-12 | SEC ↗ | |
| 13F-HR | 191 | $465.8M | 2020-08-14 | SEC ↗ | |
| 13F-HR | 184 | $297.2M | 2020-05-12 | SEC ↗ | |
| 13F-HR | 182 | $264.7M | 2020-02-14 | SEC ↗ | |
| 13F-HR | 181 | $183.0M | 2019-11-15 | SEC ↗ | |
| 13F-HR | 184 | $163.6M | 2019-08-14 | SEC ↗ | |
| 13F-HR | 189 | $159.2M | 2019-05-14 | SEC ↗ | |
| 13F-HR | 193 | $132.4M | 2019-02-13 | SEC ↗ | |
| 13F-HR | 201 | $167.6M | 2018-11-13 | SEC ↗ | |
| 13F-HR | 207 | $141.6M | 2018-08-15 | SEC ↗ | |
| 13F-HR | 197 | $108.2M | 2018-05-14 | SEC ↗ | |
| 13F-HR | 229 | $97.8M | 2018-02-12 | SEC ↗ | |
| 13F-HR | 222 | $65.5M | 2017-11-14 | SEC ↗ | |
| 13F-HR | 229 | $59.0M | 2017-08-11 | SEC ↗ | |
| 13F-HR | 211 | $44.5M | 2017-05-15 | SEC ↗ | |
| 13F-HR | 229 | $117.4M | 2017-02-14 | SEC ↗ | |
| 13F-HR | 233 | $104.6M | 2016-11-14 | SEC ↗ | |
| 13F-HR | 206 | $106.9M | 2016-08-12 | SEC ↗ | |
| 13F-HR | 210 | $112.2M | 2016-05-13 | SEC ↗ | |
| 13F-HR | 240 | $121.6M | 2016-02-12 | SEC ↗ | |
Q3 2015Amended | 13F-HR/A | 230 | $149.0M | 2015-11-12 | SEC ↗ |
| 13F-HR | 236 | $194.5M | 2015-08-12 | SEC ↗ | |
| 13F-HR | 231 | $173.4M | 2015-04-10 | SEC ↗ | |
| 13F-HR | 211 | $160.4M | 2015-01-20 | SEC ↗ | |
| 13F-HR | 206 | $169.5M | 2014-10-10 | SEC ↗ | |
| 13F-HR | 210 | $189.4M | 2014-07-22 | SEC ↗ | |
| 13F-HR | 204 | $200.8M | 2014-04-15 | SEC ↗ | |
| 13F-HR | 209 | $209.1M | 2014-01-30 | SEC ↗ | |
| 13F-HR | 213 | $225.0M | 2013-10-31 | SEC ↗ | |
| 13F-HR | 226 | $195.2M | 2013-08-05 | SEC ↗ |