# MFS Total Return Bond Series

MFS Total Return Bond Series is a registered fund series of MFS VARIABLE INSURANCE TRUST (series S000002666). Net assets $1.5B as of 2026-03-31.

## Profile

- Series ID: S000002666
- Registrant: MFS VARIABLE INSURANCE TRUST
- LEI: OBXD0C7FWK5N6XF1PG71
- Net assets: $1.5B
- Total assets: $1.5B
- As of: 2026-03-31

## Advisers

- [Massachusetts Financial Services Company (Advisor)](https://search.stillhousedata.com/firm/110045)

## Top holdings (200 reported)

_Showing 15 of 200 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [United States Treasury](https://search.stillhousedata.com/security/91282CHQ7) | — | $70.9M | 482.63% |
| [United States Treasury](https://search.stillhousedata.com/security/912810TZ1) | — | $34.3M | 233.75% |
| [United States Treasury](https://search.stillhousedata.com/security/912810TW8) | — | $30.0M | 204.50% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CMU2) | — | $20.1M | 136.66% |
| [United States Treasury](https://search.stillhousedata.com/security/912810ST6) | — | $19.5M | 132.89% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CEF4) | — | $17.4M | 118.43% |
| [United States Treasury](https://search.stillhousedata.com/security/912810TM0) | — | $15.9M | 108.31% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CPJ4) | — | $14.6M | 99.63% |
| [Wells Fargo Commercial Mortgage Trust](https://search.stillhousedata.com/security/95000JAV0) | — | $13.0M | 88.56% |
| [United States Treasury](https://search.stillhousedata.com/security/912810TX6) | — | $13.0M | 88.44% |
| [United States Treasury](https://search.stillhousedata.com/security/912810UE6) | — | $13.0M | 88.42% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CLW9) | — | $12.7M | 86.79% |
| [Freddie Mac](https://search.stillhousedata.com/security/3132DWDH3) | — | $12.1M | 82.70% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CKX8) | — | $11.6M | 79.25% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CGC9) | — | $11.0M | 74.95% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $1.5B |
| 2025-12-31 | $1.5B |
| 2025-09-30 | $1.5B |
| 2025-06-30 | $1.5B |
| 2025-03-31 | $1.5B |
| 2024-12-31 | $1.5B |
| 2024-09-30 | $1.6B |
| 2024-06-30 | $1.5B |

## More

- [Registrant: MFS VARIABLE INSURANCE TRUST](https://search.stillhousedata.com/registrant/918571)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000002666.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.