WAB — Westinghouse Air Brake Technol COM

Ownership history in TRILLIUM ASSET MANAGEMENT, LLC  ·  54 quarters on record

AI Ownership Summary

TRILLIUM ASSET MANAGEMENT, LLC reported Westinghouse Air Brake Technol COM (WAB) in 54 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 1.08% in 2023 Q4. The latest visible filing shows WAB at 0.90% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this WAB ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was TRILLIUM ASSET MANAGEMENT, LLC's position in Westinghouse Air Brake Technol COM, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2025 Q4

WAB was reported at 0.90% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.08% in 2023 Q4

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2025 Q4

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

WAB stock page TRILLIUM ASSET MANAGEMENT, LLC fund profile TRILLIUM ASSET MANAGEMENT, LLC full holdings
How TRILLIUM ASSET MANAGEMENT, LLC held WAB — position size vs. price
% of Fund (quarterly)    WAB price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED 135,775 -18,404 -11.9% 0.90% $29.3M 2026-02-14 (Est.) $255.75
2025 Q3 REDUCED 154,179 -17,115 -10.0% 0.82% $30.9M 2025-11-14 $203.67
2025 Q2 REDUCED 171,294 -14,096 -7.6% 0.96% $35.9M 2025-08-06 $187.65
2025 Q1 REDUCED 185,390 -4,453 -2.3% 0.97% $33.6M 2025-05-13 $202.84
2024 Q4 REDUCED 189,843 -20,430 -9.7% 0.93% $36.0M 2025-02-11 $206.82
2024 Q3 REDUCED 210,273 -7,805 -3.6% 0.94% $38.2M 2024-11-07 $197.28
2024 Q2 REDUCED 218,078 -55,365 -20.2% 0.87% $34.5M 2024-08-08 $153.71
2024 Q1 REDUCED 273,443 -38,544 -12.4% 1.01% $39.8M 2024-05-09 $165.71
2023 Q4 REDUCED 311,987 -2,297 -0.7% 1.08% $39.6M 2024-02-08 $135.21
45 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding WAB

As of 2026 Q1 — sorted by position size

Trium Capital LLP 3Y 1.47% Skylands Capital, LLC 3Y 7Y 1.43% CWC Advisors, LLC. 3Y 7Y 1.39% Watchman Group, Inc. 3Y 1.2% Gibraltar Capital Management, Inc. 3Y 7Y 1.18% PATTON ALBERTSON MILLER GROUP, LLC 3Y 7Y 1.18% WASHINGTON TRUST Co 3Y 7Y 1.14% DUPONT CAPITAL MANAGEMENT CORP 3Y 7Y 1.05% Border to Coast Pensions Partnership Ltd 3Y 0.99% Clean Yield Group 3Y 7Y 0.96%

FAQ About TRILLIUM ASSET MANAGEMENT, LLC and WAB

These are the practical questions this page is built to answer before you even open the full history table.

How long has TRILLIUM ASSET MANAGEMENT, LLC reported owning WAB?

TRILLIUM ASSET MANAGEMENT, LLC reported WAB across 9 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported WAB position in TRILLIUM ASSET MANAGEMENT, LLC's portfolio?

The largest reported portfolio weight for WAB was 1.08% in 2023 Q4.

What is the latest reported WAB position on this page?

The most recent filing on this page is 2025 Q4, when TRILLIUM ASSET MANAGEMENT, LLC reported 135,775 shares, equal to 0.90% of portfolio, with an estimated market value of $29.3M.

What does the chart on this WAB ownership page compare?

The chart compares TRILLIUM ASSET MANAGEMENT, LLC's quarterly WAB portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

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