# SPDR S&P MIDCAP 400 ETF TRUST

SPDR S&P MIDCAP 400 ETF TRUST (CIK 936958) is an SEC-registered fund company and $24.2B in net assets as of 2026-03-31.

## Registrant

- CIK: 936958
- File number: 811-08972
- LEI: 5493003TT35P3SIWJJ72
- Address: 11 Wall Street, New York, US-NY, 10005
- Phone: 212-656-4440
- Net assets: $24.2B
- Total assets: $24.3B
- Latest report: 2026-03-31

## Fund series (1)

| Series | Net assets |
| --- | --- |
| State Street SPDR S&P MidCap 400SM ETF Trust | $24.2B |

## Largest reported holdings (across all series)

| Holding | Value |
| --- | --- |
| TechnipFMC PLC | $843.1M |
| [Casey'S General Stores Inc.](https://search.stillhousedata.com/security/147528103) | $813.4M |
| [United Therapeutics Corporation](https://search.stillhousedata.com/security/91307C102) | $769.8M |
| [Curtiss-Wright Corp.](https://search.stillhousedata.com/security/231561101) | $757.1M |
| FLEX LTD | $725.6M |
| [XPO Inc](https://search.stillhousedata.com/security/983793100) | $687.1M |
| [Woodward Inc.](https://search.stillhousedata.com/security/980745103) | $643.3M |
| [Royal Gold, Inc.](https://search.stillhousedata.com/security/780287108) | $621.6M |
| [US Foods Holding Corp](https://search.stillhousedata.com/security/912008109) | $613.1M |
| [Burlington Stores Inc.](https://search.stillhousedata.com/security/122017106) | $610.0M |
| [ATI Inc](https://search.stillhousedata.com/security/01741R102) | $595.8M |
| [Mastec, Inc.](https://search.stillhousedata.com/security/576323109) | $595.0M |
| [Carpenter Technology Corporation](https://search.stillhousedata.com/security/144285103) | $591.9M |
| NVent Electric PLC | $575.4M |
| [Twilio Inc](https://search.stillhousedata.com/security/90138F102) | $575.1M |

## More

- [CIK 936958 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=936958&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/registrant/936958.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.