Terminal · Institutions

Every 13F-reported equity position this quarter, with its quarter-over-quarter change — each row traces back to the SEC filing.

GW&K Investment Management, LLC 13F Holdings -- Portfolio & Top Positions (2026-03-31)

GW&K Investment Management, LLC (CIK 1082917) reported $11.34B across 1,014 reported positions in its SEC 13F filing for 2026-03-31. Largest positions: AEIS ($194.0M, 1.71%), MTSI ($186.3M, 1.64%), RBC ($153.1M, 1.35%), ITT ($151.8M, 1.34%), SPXC ($135.0M, 1.19%). Source: SEC Form 13F.

RankTickerCompanyValue% PortfolioSharesAction
1AEISADVANCED ENERGY INDUSTRIES$194.0M1.71%601,105Trimmed
2MTSIMACOM TECHNOLOGY SOLUTIONS H$186.3M1.64%839,062Trimmed
3RBCRBC BEARINGS INC$153.1M1.35%281,879Trimmed
4ITTITT INC$151.8M1.34%796,746Trimmed
5SPXCSPX TECHNOLOGIES INC$135.0M1.19%675,142Added
6FIXCOMFORT SYSTEMS USA INC$131.9M1.16%95,674Trimmed
7GMEDGLOBUS MEDICAL INC - A$128.8M1.14%1.5MTrimmed
8APGAPI GROUP CORP$126.1M1.11%3.1MTrimmed
9STRLSTERLING INFRASTRUCTURE INC$124.1M1.09%304,736Trimmed
10LOPEGRAND CANYON EDUCATION INC$123.1M1.08%723,725Trimmed
11BURLBURLINGTON STORES INC$110.5M0.97%339,458Trimmed
12POWLPOWELL INDUSTRIES INC$108.5M0.96%200,535Trimmed
13TXRHTEXAS ROADHOUSE INC$105.5M0.93%638,849Trimmed
14AVGOBROADCOM INC$104.2M0.92%336,789Trimmed
15FSSFEDERAL SIGNAL CORP$103.6M0.91%958,124Added
16INSMINSMED INC$101.9M0.90%623,048Added
17NOVTNOVANTA INC$101.4M0.89%858,654Added
18MSFTMICROSOFT CORP$100.9M0.89%272,689Trimmed
19IDAIDACORP INC$100.0M0.88%699,780Trimmed
20MTDRMATADOR RESOURCES CO$98.5M0.87%1.6MTrimmed
21MGYMAGNOLIA OIL & GAS CORP - A$97.3M0.86%3.1MTrimmed
22SFSTIFEL FINANCIAL CORP$96.7M0.85%1.3MAdded
23MOG/AMOOG INC-CLASS A$96.3M0.85%328,949Trimmed
24JBLJABIL INC$91.7M0.81%345,291Trimmed
25GTESGATES INDUSTRIAL CORP PLC$91.1M0.80%4.0MTrimmed

Source: SEC Form 13F filings · as of 2026-03-31