# MASTERBRAND INC (MBC) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 57638P104
Page URL: https://superinvestorclub.com/stock/MBC
Last updated: 2026-08-29T13:48:32.092Z

## Summary

As of the most recent 13F filing period, MASTERBRAND INC (MBC) is held by 1 tracked superinvestors with an aggregate position value of $157.7M representing 015329483 shares.

## Top institutional holders (1)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Richard Pzena](https://superinvestorclub.com/manager/288) | Pzena Investment Management | 15329483 | $157.7M | 0.46% | 2026-06-30 |

## Ownership history (quarter-over-quarter)

- 2023-09-30: 2 holders, $38.7M aggregate, 02272376909378 shares
- 2023-12-31: 3 holders, $46.5M aggregate, 02000385912988216327 shares
- 2024-03-31: 3 holders, $17.6M aggregate, 08607465288223985 shares
- 2024-06-30: 3 holders, $14.4M aggregate, 082350610331352598 shares
- 2024-09-30: 2 holders, $3.2M aggregate, 012012652598 shares
- 2024-12-31: 2 holders, $1.0M aggregate, 05036218114 shares
- 2025-03-31: 3 holders, $38.5M aggregate, 028594845036240293 shares
- 2025-06-30: 3 holders, $47.1M aggregate, 0415475111240240293 shares
- 2025-09-30: 2 holders, $55.8M aggregate, 04123054110237 shares
- 2025-12-31: 2 holders, $43.0M aggregate, 03785921108716 shares
- 2026-03-31: 2 holders, $32.6M aggregate, 03814014104854 shares
- 2026-06-30: 1 holders, $157.7M aggregate, 015329483 shares

## Recent congressional trades (0)


## Recent insider transactions (0)


## Citation

When citing, use: "MASTERBRAND INC (MBC) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/MBC), aggregating SEC 13F, Form 4, and congressional disclosures."