# Fintech investors based in Boston (2026 list)

> 25 fintech investors based in Boston, 92% active in the last 12 months. Led by MassChallenge, Battery Ventures, Summit Partners. Ranked by what they funded.

Source: https://millionrounds.com/lists/fintech-investors-based-in-boston (Millionrounds; every figure on the page links to its filing or article)

[Investor Lists](https://millionrounds.com/lists)

# Fintech investors based in Boston

Updated 7 November 2026

Firms with an address in Boston that we have watched back a fintech company in the last two years.

[See all 25 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Ffintech-investors-based-in-boston)The top 25

**25** investors on the list No change this week

**332** cheques in 12 months *-15%* against the market

**$20M** median round they joined *+144%* against the market median

**92%** wrote a cheque in 12 months

**84%** have led a round

## The Top 25

Ordered by cheques observed, never by anything anyone paid for

Deploying now (23)

- 1 [MassChallenge](https://millionrounds.com/fund/masschallenge) *Deploying now* Accelerator · United States **984** **$1.8M** median round **Sept 2026** last seen
- 2 [Battery Ventures](https://millionrounds.com/fund/battery-ventures) *Deploying now* VC firm · United States **658** **$32M** median round **Nov 2026** last seen
- 3 [Summit Partners](https://millionrounds.com/fund/summit-partners) *Deploying now* Private equity · United States **356** **$81M** median round **Oct 2026** last seen
- 4 [Wellington Management](https://millionrounds.com/fund/wellington-management) *Deploying now* VC firm · United States **297** **$130M** median round **Oct 2026** last seen
- 5 [HarbourVest Partners](https://millionrounds.com/fund/harbourvest-partners) *Deploying now* Fund of funds · United States **93** **$54M** median round **Jun 2026** last seen
- 6 [MassMutual Ventures](https://millionrounds.com/fund/massmutual-ventures) *Deploying now* VC firm · United States **84** **$14M** median round **Oct 2026** last seen
- 7 [Castle Island Ventures](https://millionrounds.com/fund/castle-island-ventures) *Deploying now* VC firm · United States **78** **$7M** median round **Oct 2026** last seen
- 8 [The E14 Fund](https://millionrounds.com/fund/e14-fund) *Deploying now* VC firm · United States **72** **$8M** median round **Oct 2026** last seen
- 9 [One Way Ventures](https://millionrounds.com/fund/one-way-ventures) *Deploying now* VC firm · United States **71** **$8M** median round **Nov 2026** last seen
- 10 [PSG](https://millionrounds.com/fund/providence-equity-partners) *Deploying now* VC firm · United States **68** **$50M** median round **Aug 2026** last seen
- 11 [Underscore VC](https://millionrounds.com/fund/underscore-vc) *Deploying now* VC firm · United States **65** **$7M** median round **Sept 2026** last seen
- 12 [Advent International](https://millionrounds.com/fund/advent-international) *Deploying now* Private equity · United States **59** **$740M** median round **Oct 2026** last seen
- 13 [Bain Capital](https://millionrounds.com/fund/bain-capital) *Deploying now* Private equity · United States **58** **$50M** median round **Aug 2026** last seen
- 14 [Elephant](https://millionrounds.com/fund/elephant) *Deploying now* VC firm · United States **54** **$16M** median round **Jul 2026** last seen
- 15 [Raptor Group](https://millionrounds.com/fund/raptor-group) *Deploying now* Private equity · United States **50** **$15M** median round **Sept 2026** last seen
- 16 [Asymmetric Capital Partners](https://millionrounds.com/fund/asymmetric) *Deploying now* VC firm · United States **44** **$8.3M** median round **Sept 2026** last seen
- 17 [Suffolk Technologies](https://millionrounds.com/fund/suffolk-technologies) *Deploying now* VC firm · United States **39** **$5.3M** median round **Jun 2026** last seen
- 18 [Will Ventures](https://millionrounds.com/fund/will-ventures) *Deploying now* VC firm · United States **39** **$7M** median round **Sept 2026** last seen
- 19 [HighSage Ventures](https://millionrounds.com/fund/highsage-ventures) *Deploying now* VC firm · United States **8** **$30M** median round **Oct 2026** last seen
- 20 [GMO](https://millionrounds.com/fund/gmo) quiet Private equity · United States **5** **$12M** median round **Mar 2025** last seen
- 21 [State Street Corporation](https://millionrounds.com/fund/state-street-corporation) *Deploying now* Corporate VC · United States **5** **$120M** median round **Oct 2026** last seen
- 22 [Smith Point Capital](https://millionrounds.com/fund/smith-point-capital) *Deploying now* VC firm · United States **4** **$123M** median round **Sept 2026** last seen
- 23 [State Street Global Advisors](https://millionrounds.com/fund/state-street-global-advisors) quiet VC firm · United States **4** **$50M** median round **Apr 2025** last seen
- 24 [Whale Rock](https://millionrounds.com/fund/whale-rock) *Deploying now* Hedge fund · United States **4** **$725M** median round **Sept 2026** last seen
- 25 [Brewer Lane Ventures](https://millionrounds.com/fund/brewer-lane-ventures) *Deploying now* VC firm · United States **2** **$20M** median round **Aug 2026** last seen

## The Newest Cheques

Rounds this list's investors joined most recently

- **4** Nov **[Shackleton AI](https://millionrounds.com/company/shackleton-ai)** Seed · $5M *Led by* [Battery Ventures](https://millionrounds.com/fund/battery-ventures)
- **4** Nov **[Lazarus AI](https://millionrounds.com/company/lazarus-ai)** $43M *With* [One Way Ventures](https://millionrounds.com/fund/one-way-ventures)
- **3** Nov **[Traversal](https://millionrounds.com/company/traversal)** Series B · $120M *With* [Battery Ventures](https://millionrounds.com/fund/battery-ventures)
- **28** Oct **[Birch Hill](https://millionrounds.com/company/birch-hill)** Seed · $4M *With* [Castle Island Ventures](https://millionrounds.com/fund/castle-island-ventures)
- **28** Oct **[Firehawk Defense](https://millionrounds.com/company/firehawk-defense)** Series D+ · $150M *Led by* [Advent International](https://millionrounds.com/fund/advent-international)
- **27** Oct **[Archera](https://millionrounds.com/company/archera)** Series C · $15M *With* [HighSage Ventures](https://millionrounds.com/fund/highsage-ventures)

## Stages This Year

328 rounds

- Venture **16%**
- Seed **15%**
- Series A **12%**
- Series B **11%**
- Other **9%**
- Other **37%**

## What They Backed

Sectors, last 12 months

- AI **130**
- Biotech **35**
- Fintech **34**
- Healthcare **24**
- Big Data & Analytics **23**
- Cybersecurity **15**

## Cheques by Quarter

Led Joined

101 Q1 25

107 Q2 25

88 Q3 25

115 Q4 25

114 Q1 26

77 Q2 26

88 Q3 26

16 Q4 26

The last bar is the quarter still running.

## Lists Like This

- [AI investors based in San Francisco 353](https://millionrounds.com/lists/ai-investors-based-in-san-francisco)
- [AI investors based in New York 345](https://millionrounds.com/lists/ai-investors-based-in-new-york)
- [Seed investors based in San Francisco 273](https://millionrounds.com/lists/seed-investors-based-in-san-francisco)
- [Series A investors based in San Francisco 266](https://millionrounds.com/lists/series-a-investors-based-in-san-francisco)
- [Series A investors based in New York 255](https://millionrounds.com/lists/series-a-investors-based-in-new-york)
- [Seed investors based in New York 227](https://millionrounds.com/lists/seed-investors-based-in-new-york)
- [AI investors based in London 223](https://millionrounds.com/lists/ai-investors-based-in-london)
- [Series B investors based in New York 198](https://millionrounds.com/lists/series-b-investors-based-in-new-york)
- [Fintech investors based in New York 197](https://millionrounds.com/lists/fintech-investors-based-in-new-york)

[All investor lists *→*](https://millionrounds.com/lists)

## Quick answers about fintech investors based in Boston

### Who are the most active fintech investors based in Boston?

By cheques observed, the most active are MassChallenge, Battery Ventures, Summit Partners, Wellington Management and HarbourVest Partners.

### How many fintech investors based in Boston are there?

25 are on record. 92% made an investment in the last 12 months and 84% have led a round.

### Which stages do fintech investors based in Boston back?

Of the rounds with a named stage in the last 12 months, mostly Seed (22%) and Series A (17%).

### How big are the rounds fintech investors based in Boston join?

The typical (median) round among the leading investors here is $20M.

### Which sectors do fintech investors based in Boston back most?

In the last 12 months, mostly AI, Biotech and Fintech.

### Which fintech investors based in Boston lead the most rounds?

Battery Ventures (29 led), Wellington Management (15 led) and Summit Partners (11 led).

### What have fintech investors based in Boston invested in recently?

Recent rounds include Shackleton AI (Seed, Nov 2026, with Battery Ventures), Lazarus AI (Nov 2026, with One Way Ventures) and Traversal (Series B, Nov 2026, with Battery Ventures).

### How is this list of fintech investors based in Boston ranked?

By cheques observed, from the rounds and filings we watched, and never by anything anyone paid for. It is rebuilt every night.

Built from the rounds we watched, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections)