Reconstructed first-round book from the research data, not a scrape of today's website. Public portfolio pages over-report winners, and this graph has the same public-data bias. Investor edges are essentially Crunchbase through late 2015, plus Y Combinator.

Research book · 3-year follow-on

North Bridge Growth Equity vs Kairos

Not ranked

Whole-book follow-on hit rate 16.7% (1 of 6 labeled deals). 95% Wilson interval 3.0%–56.4%. Vintage-weighted base rate 43.9%. This is not a fund return.

Not ranked. A book needs at least 15 labeled deals with a vintage base rate. This one has 6.

Fund board

Vs same-vintage base rate

-27.3 pp

16.7% on 6 deals vs 43.9%

Vs median VC book

-38.4 pp

16.7% on 6 deals vs 55.1%

Vs top-quartile VC

-54.6 pp

16.7% on 6 deals vs 71.2%

Vs Y Combinator

-52.5 pp

16.7% on 6 deals vs 69.1%

Ranked when at least 15 labeled deals have a vintage base rate. Rank is the average-rank percentile of shrunk excess (20 pseudo-deals at that book's vintage base rate) among eligible VC books that clear the same minimum. 100 is best. The whole book is never compared to Kairos's top-50 hit rate.

What Kairos would have said

Scores are the model’s percentile at each company’s first observed funding event, not at a later round. That matches this fund’s entry only when the fund was in the first-round syndicate. A deal is flagged when its percentile clears that vintage’s top-50 cutoff. The whole book is not compared to the top-50 hit rate.

Deals with a score

Mean model percentile

Flagged deals

0no labeled flagged deals

Companies

6 labeled follow-on deals, 0 matched without an observable label (dropped, not counted as failures).

Company	Vintage	Follow-on	Kairos percentile	Flagged
Allegro Development Corporationallegrodev.com	2008	No	71	—
Leapfrog Onlineleapfrogonline.com	2008	No	39	—
Contact Solutionscontactsolutions.com	2010	No	31	—
Valence Healthvalencehealth.com	2012	Yes	31	—
BrightTALKbrighttalk.com	2011	No	16	—
SPIL GAMESspilgames.com	2011	No	10	—