CIK: 0000762152 | EAST LANSING, MI
| Quarter | Form Type | Holdings | Value | Filed | SEC |
|---|---|---|---|---|---|
| 13F-HR | 966 | $22.6B | 2026-10-27 | SEC ↗ | |
| 13F-HR | 960 | $22.6B | 2026-07-30 | SEC ↗ | |
| 13F-HR | 941 | $18.9B | 2026-05-04 | SEC ↗ | |
| 13F-HR | 935 | $20.6B | 2026-01-29 | SEC ↗ | |
| 13F-HR | 944 | $20.8B | 2025-11-05 | SEC ↗ | |
| 13F-HR | 944 | $19.3B | 2025-08-05 | SEC ↗ | |
| 13F-HR | 944 | $17.3B | 2025-04-30 | SEC ↗ | |
| 13F-HR | 951 | $19.2B | 2025-02-06 | SEC ↗ | |
| 13F-HR | 950 | $20.2B | 2024-11-04 | SEC ↗ | |
| 13F-HR | 950 | $19.5B | 2024-07-26 | SEC ↗ | |
| 13F-HR | 955 | $18.6B | 2024-04-18 | SEC ↗ | |
| 13F-HR | 958 | $16.8B | 2024-01-23 | SEC ↗ | |
| 13F-HR | 964 | $15.5B | 2023-10-27 | SEC ↗ | |
| 13F-HR | 969 | $16.2B | 2023-07-26 | SEC ↗ | |
| 13F-HR | 968 | $15.2B | 2023-04-28 | SEC ↗ | |
| 13F-HR | 967 | $14.4B | 2023-01-27 | SEC ↗ | |
| 13F-HR | 966 | $1.3B | 2022-10-24 | SEC ↗ | |
| 13F-HR | 970 | $991.3M | 2022-08-08 | SEC ↗ | |
| 13F-HR | 948 | $831.2M | 2022-05-04 | SEC ↗ | |
| 13F-HR | 975 | $938.8M | 2022-01-27 | SEC ↗ | |
| 13F-HR | 975 | $833.0M | 2021-10-27 | SEC ↗ | |
| 13F-HR | 969 | $996.5M | 2021-07-27 | SEC ↗ | |
Q1 2021Amended | 13F-HR/A | 919 | $936.0M | 2021-05-03 | SEC ↗ |
Q4 2020Amended | 13F-HR/A | 942 | $863.5M | 2021-02-01 | SEC ↗ |
| 13F-HR | 956 | $722.7M | 2020-10-26 | SEC ↗ | |
| 13F-HR | 931 | $655.4M | 2020-07-29 | SEC ↗ | |
Q1 2020Amended | 13F-HR/A | 943 | $201.7M | 2020-04-28 | SEC ↗ |
| 13F-HR | 947 | $595.5M | 2020-01-24 | SEC ↗ | |
| 13F-HR | 944 | $560.5M | 2019-10-22 | SEC ↗ | |
| 13F-HR | 948 | $598.9M | 2019-07-26 | SEC ↗ | |
| 13F-HR | 950 | $756.9M | 2019-05-06 | SEC ↗ | |
| 13F-HR | 944 | $703.8M | 2019-02-01 | SEC ↗ | |
| 13F-HR | 940 | $734.5M | 2018-10-26 | SEC ↗ | |
| 13F-HR | 936 | $655.5M | 2018-08-08 | SEC ↗ | |
| 13F-HR | 940 | $653.2M | 2018-05-08 | SEC ↗ | |
| 13F-HR | 939 | $585.4M | 2018-02-01 | SEC ↗ | |
| 13F-HR | 944 | $566.5M | 2017-10-19 | SEC ↗ | |
| 13F-HR | 948 | $507.9M | 2017-07-19 | SEC ↗ | |
| 13F-HR | 945 | $500.4M | 2017-05-01 | SEC ↗ | |
| 13F-HR | 958 | $519.3M | 2017-02-02 | SEC ↗ | |
| 13F-HR | 965 | $570.3M | 2016-11-02 | SEC ↗ | |
| 13F-HR | 967 | $488.3M | 2016-08-03 | SEC ↗ | |
| 13F-HR | 958 | $439.8M | 2016-05-06 | SEC ↗ | |
| 13F-HR | 955 | $392.9M | 2016-02-01 | SEC ↗ | |
| 13F-HR | 958 | $404.7M | 2015-10-30 | SEC ↗ | |
| 13F-HR | 956 | $555.3M | 2015-08-03 | SEC ↗ | |
| 13F-HR | 952 | $544.1M | 2015-04-30 | SEC ↗ | |
| 13F-HR | 952 | $450.3M | 2015-02-03 | SEC ↗ | |
Q3 2014Amended | 13F-HR/A | 950 | $304.7M | 2014-11-06 | SEC ↗ |
| 13F-HR | 952 | $491.8M | 2014-08-06 | SEC ↗ | |
| 13F-HR | 953 | $495.2M | 2014-05-06 | SEC ↗ | |
| 13F-HR | 948 | $401.6M | 2014-02-07 | SEC ↗ | |
| 13F-HR | 953 | $315.4M | 2013-11-08 | SEC ↗ | |
| 13F-HR | 947 | $307.4M | 2013-08-08 | SEC ↗ |