Gw&k Investment Management, LLC is an SEC-registered investment adviser based in Boston, MA that reports managing 3 hedge funds on Form ADV. It reports $52.8 billion in regulatory assets under management. Its private funds, of all types, hold $171.0 million in gross assets. Its disclosed U.S. stock holdings returned an estimated +17.7% 2026 YTD through Jun 30 (S&P 500: +9.5%), based on 13F filings. Over a longer period they returned an estimated +36.7% from Q3 2024 to Q2 2026, compared with +37.2% for the S&P 500, based on 13F filings.
- Regulatory assets under management
- $52.8 billionForm ADV Item 5.F
- Gross assets of private funds
- $171.0 millionAll private fund types, Form ADV
- Hedge funds managed
- 33 private funds in total
- Employees
- 177Form ADV Item 5.A
- Registration
- SEC-registered adviserCRD 121942
- Latest Form ADV
- 03/26/2026Disciplinary disclosures: none reported
Estimated 13F portfolio performance
| Quarter | Est. 13F return | S&P 500 |
|---|---|---|
| Q2 2026 | +16.7% | +14.8% |
| Q1 2026 | +0.9% | -4.6% |
| Q4 2025 | +1.9% | +2.4% |
| Q3 2025 | +6.9% | +7.8% |
| Q2 2025 | +5.5% | +10.4% |
| Q1 2025 | -6.5% | -4.5% |
| Q4 2024 | +0.8% | +2.1% |
| Q3 2024 | +7.3% | +5.4% |
Estimate of the firm's disclosed long U.S. stock portfolio from its quarterly 13F filings, holding each quarter-end portfolio to the next quarter-end at prices implied by all 13F filers. It is a price return before dividends and fees, ignores shorts, options, bonds, cash and trading within the quarter, and is not the return of any fund. Disclosures
Largest disclosed holdings
- Ma Com Technology Solutions Ho$241.4 million
- Advanced Energy Inds$215.5 million
- SPX Technologies Inc$175.0 million
- Sterling Infrastructure Inc Com$165.9 million
- Itt Inc$151.1 million
- Novanta Inc Com NPV$145.6 million
- RBC Bearings Inc$144.5 million
- Moog Inc$132.0 million
- Entegris Inc$125.3 million
- Api Group Corp$125.2 million
As of 2026-06-30, from 13F filing by GW&K Investment Management, LLC.
From SEC filings. Firm data comes from the SEC's Form ADV data as of Oct 2, 2026; performance estimates come from Form 13F. HedgeMountain has not verified this information, and it is not an offer, solicitation or recommendation. Full disclosures