# Columbia Mid Cap Index Fund

Columbia Mid Cap Index Fund is a registered fund series of COLUMBIA FUNDS SERIES TRUST (series S000010826). Net assets $2.5B as of 2026-05-31. Index fund.

## Profile

- Series ID: S000010826
- Registrant: COLUMBIA FUNDS SERIES TRUST
- LEI: T7U4HCU80YGSBI8Z3385
- Net assets: $2.5B
- Total assets: $2.5B
- As of: 2026-05-31
- Type: Index

## Advisers

- [Columbia Management Investment Advisers, LLC (Advisor)](https://search.stillhousedata.com/firm/108257)

## Top holdings (200 reported)

_Showing 15 of 200 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| Flex Ltd | — | $39.6M | 155.83% |
| [COLUMBIA SHORT TERM CASH FUND](https://search.stillhousedata.com/security/19766H239) | — | $32.5M | 127.88% |
| [Twilio Inc](https://search.stillhousedata.com/security/90138F102) | — | $20.6M | 81.25% |
| TechnipFMC PLC | — | $19.8M | 77.80% |
| [Curtiss-Wright Corp](https://search.stillhousedata.com/security/231561101) | — | $19.7M | 77.48% |
| nVent Electric PLC | — | $19.2M | 75.74% |
| [Sterling Infrastructure Inc](https://search.stillhousedata.com/security/859241101) | — | $18.9M | 74.33% |
| [XPO Inc](https://search.stillhousedata.com/security/983793100) | — | $17.9M | 70.55% |
| [Everpure Inc](https://search.stillhousedata.com/security/74624M102) | — | $17.8M | 70.10% |
| [Illumina Inc](https://search.stillhousedata.com/security/452327109) | — | $17.8M | 70.04% |
| [United Therapeutics Corp](https://search.stillhousedata.com/security/91307C102) | — | $17.1M | 67.39% |
| [ATI Inc](https://search.stillhousedata.com/security/01741R102) | — | $17.0M | 66.89% |
| [MACOM Technology Solutions Holdings Inc](https://search.stillhousedata.com/security/55405Y100) | — | $16.8M | 66.12% |
| Fabrinet | — | $16.7M | 65.88% |
| [Carpenter Technology Corp](https://search.stillhousedata.com/security/144285103) | — | $16.7M | 65.66% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-05-31 | $2.5B |
| 2026-02-28 | $2.6B |
| 2025-11-30 | $2.5B |
| 2025-08-31 | $2.6B |
| 2025-05-31 | $2.4B |
| 2025-02-28 | $2.5B |
| 2024-11-30 | $2.8B |
| 2024-08-31 | $2.7B |

## More

- [Registrant: COLUMBIA FUNDS SERIES TRUST](https://search.stillhousedata.com/registrant/1097519)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000010826.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.