SIDELINE GROUP
Firm details
- Headquarters
- New York, New York
- CRD number
- 337813
- Registered since
- July 8, 2025
Firm profile
FINTRXOverview
Sideline Group is organized as a limited liability company and is registered with the SEC as of 2025. The firm operates primarily as a sponsor, general partner and managing member of pooled investment vehicles rather than as a traditional retail advisory practice. Its owner structure is listed as individual and its regulatory classification is unclassified. Sideline Group is not identified as an active ESG investor, is not a multi-state adviser, and does not list pension consulting or related-adviser roles. Investment activity centers on private fund formation and GP-led portfolio management, with a clear emphasis on venture capital strategies. The firm appears to allocate capital by creating and managing pooled vehicles where it serves in governance and sponsor roles, taking on active oversight and control functions typical of a GP. Public fee structure, client-facing advisory offerings and direct retail account activity are not reported.
Assets & Accounts
Investments & Alternatives
Location & Offices
Investment profile
FINTRXTraditional investments used
Alternative investments used
Active ESG investor
Technology & operations
FINTRXCRM & tech providers
TAMPs used
Clients
FINTRXClient base
Client personas
Contacts
1 of 1Gregory Mazlin
FounderCRD 8130215
Wealth teams
FINTRXNewly hired reps
FINTRXRecent M&A activity
FINTRXRecent filings
FINTRXAwards
FINTRXLocation
New York, NY
NEW YORK
Location
New York, NY
Headquartered in New York, NY, anchoring the New York-Newark, NY-NJ-CT-PA metro in the Northeast.
- Metro area
- New York-Newark, NY-NJ-CT-PA
- Region
- Northeast
- County
- NEW YORK
- Address
- 405 W 13th St
- Time zone
- ET (UTC-5)
- Office locations
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