# Fidelity Total Bond ETF

Fidelity Total Bond ETF is a ETF series of Fidelity Merrimack Street Trust (series S000042567). Net assets $26.1B as of 2026-05-31.

## Profile

- Series ID: S000042567
- Registrant: Fidelity Merrimack Street Trust
- LEI: 549300VK0I6RC7ZFUM07
- Net assets: $26.1B
- Total assets: $30.1B
- As of: 2026-05-31
- Type: ETF

## Advisers

- [FMR Investment Management (UK) Limited (Subadvisor)](https://search.stillhousedata.com/firm/108273)
- [Fidelity Management & Research Company LLC (Advisor)](https://search.stillhousedata.com/firm/108281)
- [Fidelity Management & Research (Hong Kong) Limited (Subadvisor)](https://search.stillhousedata.com/firm/148045)
- [Fidelity Management & Research (Japan) Limited (Subadvisor)](https://search.stillhousedata.com/firm/148239)

## Top holdings (200 reported)

_Showing 15 of 200 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [Fidelity Revere Street Trust](https://search.stillhousedata.com/security/31635A105) | — | $1.2B | 462.32% |
| [UST NOTES](https://search.stillhousedata.com/security/91282CLJ8) | — | $609.0M | 233.71% |
| [UST NOTES](https://search.stillhousedata.com/security/91282CPZ8) | — | $576.4M | 221.20% |
| [UST NOTES](https://search.stillhousedata.com/security/91282CNT4) | — | $566.1M | 217.27% |
| [UST NOTES](https://search.stillhousedata.com/security/91282CLF6) | — | $471.1M | 180.79% |
| [UNITED STATES TREASURY BOND](https://search.stillhousedata.com/security/912810TX6) | — | $399.8M | 153.41% |
| [UST NOTES](https://search.stillhousedata.com/security/91282CPQ8) | — | $388.2M | 148.99% |
| [UNITED STATES TREASURY BOND](https://search.stillhousedata.com/security/912810UE6) | — | $328.6M | 126.12% |
| [UST NOTES](https://search.stillhousedata.com/security/91282CPY1) | — | $312.5M | 119.91% |
| [FNMA/FHLG TBA ISSUER](https://search.stillhousedata.com/security/01F020661) | — | $310.0M | 118.95% |
| [UST NOTES](https://search.stillhousedata.com/security/91282CMT5) | — | $306.2M | 117.51% |
| [GNMA II GTD PASS THRU CTF MULTIPLE ISSUER](https://search.stillhousedata.com/security/21H052660) | — | $297.4M | 114.14% |
| [UNITED STATES TREASURY BOND](https://search.stillhousedata.com/security/912810UM8) | — | $293.0M | 112.44% |
| [UNITED STATES TREASURY BOND](https://search.stillhousedata.com/security/912810UK2) | — | $271.4M | 104.16% |
| [UST NOTES](https://search.stillhousedata.com/security/91282CNF4) | — | $269.4M | 103.38% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-05-31 | $26.1B |
| 2026-02-28 | $25.1B |
| 2025-11-30 | $22.9B |
| 2025-08-31 | $20.3B |
| 2025-05-31 | $18.5B |
| 2025-02-28 | $18.1B |
| 2024-11-30 | $16.6B |
| 2024-08-31 | $11.5B |

## More

- [Registrant: Fidelity Merrimack Street Trust](https://search.stillhousedata.com/registrant/1562565)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000042567.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.