# TREX INC COM

TREX INC COM is a security (CUSIP 89531P105) tracked across SEC portfolio filings. 463 institutional managers reported $4.0B on Form 13F as of 2026-06-30; 37 registered fund positions totaling $264.4M via N-PORT as of 2026-05-31.

## Summary

- Issuer: TREX INC
- Class: COM
- CUSIP: 89531P105
- Asset category: EC
- 13F holders: 463
- 13F value: $4.0B
- 13F period: 2026-06-30
- N-PORT fund positions: 37
- N-PORT value: $264.4M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 463 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $377.4M | 10,361,159 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $344.5M | 9,820,336 |
| WELLINGTON MANAGEMENT GROUP LLP | BOSTON, MA | $304.4M | 8,358,778 |
| [ALLIANCEBERNSTEIN L.P.](https://search.stillhousedata.com/firm/108477) | NASHVILLE, TN | $225.6M | 6,430,978 |
| [WASATCH ADVISORS LP](https://search.stillhousedata.com/firm/6081) | SALT LAKE CITY, UT | $188.0M | 3,757,238 |
| [AQR CAPITAL MANAGEMENT LLC](https://search.stillhousedata.com/firm/111883) | Greenwich, CT | $152.7M | 4,246,384 |
| STATE STREET CORP | BOSTON, MA | $118.4M | 3,250,111 |
| MORGAN STANLEY | NEW YORK, NY | $77.9M | 2,140,250 |
| [Clearbridge Investments, LLC](https://search.stillhousedata.com/firm/137028) | New York, NY | $77.3M | 2,121,121 |
| BANK OF AMERICA CORP /DE/ | CHARLOTTE, NC | $73.6M | 2,020,399 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $72.0M | 1,975,680 |
| Impax Asset Management Group plc | LONDON, X0 | $64.3M | 1,766,368 |
| WESTWOOD HOLDINGS GROUP INC | DALLAS, TX | $63.7M | 1,748,611 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $61.9M | 1,700,549 |
| AMERICAN CENTURY COMPANIES INC | KANSAS CITY, MO | $61.0M | 1,676,015 |

## Top fund holders (N-PORT)

_Showing 15 of 37 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| State Street SPDR S&P MidCap 400SM ETF Trust | SPDR S&P MIDCAP 400 ETF TRUST | $117.8M | 48.63% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $43.6M | 5.35% |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $28.5M | 13.09% |
| [AB LARGE CAP GROWTH FUND INC](https://search.stillhousedata.com/fund/S000010251) | AB LARGE CAP GROWTH FUND INC | $17.7M | 7.42% |
| [Fidelity Series Large Cap Stock Fund](https://search.stillhousedata.com/fund/S000039214) | Fidelity Hastings Street Trust | $9.2M | 3.72% |
| [Nationwide Geneva Small Cap Growth Fund](https://search.stillhousedata.com/fund/S000041104) | Nationwide Mutual Funds | $8.5M | 76.99% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $4.5M | 6.00% |
| [Fidelity Advisor Stock Selector Mid Cap Fund](https://search.stillhousedata.com/fund/S000005114) | Fidelity Advisor Series I | $4.0M | 15.73% |
| ROYCE SMALL-CAP TRUST, INC. | ROYCE SMALL-CAP TRUST, INC. | $3.4M | 15.31% |
| [Columbia Mid Cap Index Fund](https://search.stillhousedata.com/fund/S000010826) | COLUMBIA FUNDS SERIES TRUST | $3.2M | 12.48% |
| [Small Cap Growth Fund](https://search.stillhousedata.com/fund/S000008021) | VALIC Co II | $2.8M | 94.19% |
| Gabelli Equity Trust Inc | Gabelli Equity Trust Inc | $2.7M | 15.55% |
| [Large Cap Index Master Portfolio](https://search.stillhousedata.com/fund/S000033023) | Master Investment Portfolio | $2.2M | 0.62% |
| [Fidelity Advisor Capital Development Fund](https://search.stillhousedata.com/fund/S000006056) | Fidelity Destiny Portfolios | $2.2M | 3.87% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $2.2M | 0.37% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/89531P105.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.