# Putnam Mortgage Securities Fund

Putnam Mortgage Securities Fund is a registered fund series of Putnam Mortgage Securities Fund (series S000006570). Net assets $386.6M as of 2026-03-31.

## Profile

- Series ID: S000006570
- Registrant: Putnam Mortgage Securities Fund
- LEI: V36NQTUWG8SKLKSHZZ27
- Net assets: $386.6M
- Total assets: $1.5B
- As of: 2026-03-31

## Advisers

- [Franklin Advisers, Inc. (Advisor)](https://search.stillhousedata.com/firm/104517)
- [Putnam Investment Management, LLC (Subadvisor)](https://search.stillhousedata.com/firm/106629)
- [Franklin Templeton Investment Management Limited (Subadvisor)](https://search.stillhousedata.com/firm/111360)

## Top holdings (200 reported)

_Showing 15 of 200 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [FNMA or FHLMC](https://search.stillhousedata.com/security/01F052649) | — | $110.5M | 2858.90% |
| [FNMA or FHLMC](https://search.stillhousedata.com/security/01F060642) | — | $85.6M | 2215.15% |
| [FNMA or FHLMC](https://search.stillhousedata.com/security/01F062648) | — | $71.4M | 1846.67% |
| [FNMA or FHLMC](https://search.stillhousedata.com/security/01F020646) | — | $60.4M | 1563.07% |
| [Putnam Short Term Investment Fund](https://search.stillhousedata.com/security/74676P664) | — | $53.5M | 1383.22% |
| [FNMA or FHLMC](https://search.stillhousedata.com/security/01F022642) | — | $36.2M | 935.35% |
| [FNMA or FHLMC](https://search.stillhousedata.com/security/01F030645) | — | $22.8M | 590.82% |
| [FNMA or FHLMC](https://search.stillhousedata.com/security/01F032641) | — | $22.0M | 569.20% |
| [FNMA or FHLMC](https://search.stillhousedata.com/security/01F042640) | — | $18.8M | 486.87% |
| [FNMA or FHLMC](https://search.stillhousedata.com/security/01F020448) | — | $16.6M | 428.42% |
| [GNMA](https://search.stillhousedata.com/security/21H022648) | — | $13.8M | 356.12% |
| [GNMA](https://search.stillhousedata.com/security/21H032647) | — | $12.8M | 332.21% |
| [GNMA](https://search.stillhousedata.com/security/21H020642) | — | $12.4M | 320.62% |
| [GNMA](https://search.stillhousedata.com/security/21H060648) | — | $12.2M | 315.67% |
| [GNMA](https://search.stillhousedata.com/security/21H040640) | — | $12.2M | 315.05% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $386.6M |
| 2025-12-31 | $390.0M |
| 2025-09-30 | $409.5M |
| 2025-06-30 | $416.9M |
| 2025-03-31 | $432.2M |
| 2024-12-31 | $409.0M |
| 2024-09-30 | $434.2M |
| 2024-06-30 | $424.2M |

## More

- [Registrant: Putnam Mortgage Securities Fund](https://search.stillhousedata.com/registrant/732337)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000006570.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.