# FENWAY SUMMER INVESTMENT MANAGEMENT LLC

FENWAY SUMMER INVESTMENT MANAGEMENT LLC of WASHINGTON, DC is an SEC exempt reporting adviser.

## Registration

- CRD: 174384
- Type: SEC exempt reporting adviser
- SEC file number: 802-98350
- Location: 900 16TH ST NW, SUITE 250, WASHINGTON, DC, 20006
- Phone: 202-864-6229
- Latest filing: 2026-01-29

## Officers, owners & control persons (7)

| Name | Role | Location |
| --- | --- | --- |
| [Mark Edward Lefanowicz](https://search.stillhousedata.com/person/369322) | MANAGING DIRECTOR, FENWAY SUMMER INVESTMENT MANAGEMENT LLC; MANAGING DIRECTOR, FENWAY SUMMER VENTURES GP LLC | Bethesda, MD |
| [Alexander Griffiths Acree](https://search.stillhousedata.com/person/369326) | MEMBER, FENWAY SUMMER VENTURES GP LLC | Bethesda, MD |
| [Rajeev V Date](https://search.stillhousedata.com/person/668873) | MANAGING DIRECTOR AND CCO, FENWAY SUMMER INVESTMENT MANAGEMENT LLC; MANAGING DIRECTOR, FENWAY SUMMER VENTURES GP LLC; MANAGING DIRECTOR, FS HOLDINGS MANAGER LLC (+2 more) | — |
| [LEFANOWICZ MARK EDWARD](https://search.stillhousedata.com/person/835077) | MANAGING DIRECTOR; MANAGING DIRECTOR, FENWAY SUMMER INVESTMENT MANAGEMENT LLC; MANAGING DIRECTOR, FENWAY SUMMER VENTURES GP LLC (+1 more) | — |
| [DATE RAJEEV V](https://search.stillhousedata.com/person/885724) | MANAGING DIRECTOR; MANAGING DIRECTOR AND CCO, FENWAY SUMMER INVESTMENT MANAGEMENT LLC; MANAGING DIRECTOR, FENWAY SUMMER INVESTMENT MANAGEMENT LLC (+4 more) | — |
| [ACREE ALEXANDER GRIFFITHS](https://search.stillhousedata.com/person/885725) | MANAGING DIRECTOR/CCO; MANAGING DIRECTOR/CCO, FENWAY SUMMER INVESTMENT MANAGEMENT LLC; MANAGING DIRECTOR, FENWAY SUMMER VENTURES GP LLC (+2 more) | — |
| [SAADE JAVIER EDUARDO](https://search.stillhousedata.com/person/895136) | MANAGING DIRECTOR, FENWAY SUMMER INVESTMENT MANAGEMENT LLC; MANAGING DIRECTOR, FENWAY SUMMER VENTURES GP LLC | — |


## Private funds (4)

| Fund | Type | Formed | Owners | GAV | Min investment |
| --- | --- | --- | --- | --- | --- |
| FENWAY SUMMER VENTURES LP | Venture Capital Fund | Delaware | 9 | $29.7M | $500K |
| FENWAY SUMMER LLC | Venture Capital Fund | Delaware | 1 | $28.6M | — |
| FENWAY SUMMER SPECIAL OPPORTUNITIES 2018 LLC | Venture Capital Fund | Delaware | 2 | $16.2M | — |
| FENWAY SUMMER SPECIAL OPPORTUNITIES 2023 LLC | Venture Capital Fund | Delaware | 0 | $7.1M | — |


## Fund service providers (2)

- administrator: ESHARES, INC. DBA CARTA, INC. — 3 funds
- administrator: ESHARES INC, DBA CARTA, INC

## Related pages

- Form ADV Part 2 brochure: https://search.stillhousedata.com/firm/174384/brochure
- Similar advisers: https://search.stillhousedata.com/firm/174384/similar
- Related entities: https://search.stillhousedata.com/firm/174384/related
- SEC IAPD (source of record): https://adviserinfo.sec.gov/firm/summary/174384

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Source: public SEC Form ADV data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.