
The same thing, better, for sixty years
Jiro Ono
“Once you decide on your occupation, you must immerse yourself in your work.”
Fintech · Series A to Series C
End-to-end fundraising for founders who only accept outlier results. From the first line of the narrative to money in the bank.
Write to MarcialWhy Oss exists
Between Series A and Series C, you raise every 18 to 24 months. Each round is four to six months of narrative, targeting, meetings, diligence, and negotiation — on top of running the company. What you need at the table is expertise that is not conflicted. Someone whose only job is to get you the best possible outcome. No competing interests. No other agenda. That is a rare thing. Oss takes a retainer and a success fee (cash + equity) to be as aligned to you as possible.
How this works
The story, the price, the frame — before anyone sees a deck.
Built to survive diligence. Deck, model, memo, Q&A.
Thirty to forty funds mapped for this round. No spray lists.
Parallel conversations, weekly pipeline. Momentum is a calendar.
Term sheets compared. Syndicate composed. We stay until money lands.
The edge
1%
In the Olympics, 1% is what separates
Gold from 4th place.
In a fundraise, it decides your entire next chapter.
The right lead investor changes everything that follows: the valuation, the signal to the market, the terms on the next round.
On a company worth US$100M, two points is US$2M in your cap table. Not a rounding error.
A single unfriendly term can cost you decision-making freedom for years. Most founders never see it coming.
The best outcome is rarely the first offer. Knowing when to hold is a skill. Knowing when to close is another.
Selected engagements

Cashea
US$100M
Two rounds. From repositioning to close. The largest fintech raise in Venezuela, managed end to end.
Read case studyRemitee
US$20M
Series A at 2× valuation step-up, six months after Seed Extension.
Nubceo
4×
Oversubscribed Seed. Tier 1 investors. Valuation step-up.
inDrive
5×
Business diversification. M&A function built from zero across Latin America.

Where we draw from
The people who shaped how Oss thinks about the work do not come from banking. They come from the belief that doing one thing with complete dedication changes what is possible.

The same thing, better, for sixty years
“Once you decide on your occupation, you must immerse yourself in your work.”

The cost of getting it right
He spent over a year animating four seconds of a crowd scene. The audience never noticed. That was the point.

He plays nothing. He hears everything.
“I know what I like and what I don’t like.”

The second seat
“Take a simple idea and take it seriously.”

Helping founders do what they could not do alone
Fifty years in venture. Still the first call founders make when the stakes are highest.
Who you work with
Operator first. Investor second. Now neither — because the gap between building a company and successfully raising capital for it turned out to be a full-time job that nobody was doing well.
It turns out a few decisions decide most of it — and most founders make those decisions without anyone in the room who has seen them before.
There is no good name for this role. Not a banker. Not a consultant. The closest description is the oldest one: someone beside you, who has seen this before, and stays.
No juniors. No handoffs. The person who writes the narrative is the person in the room.
Get in touch
A handful of new clients a year. Usually a CEO planning a raise in the next three to nine months. Two lines: the company, and what is in front of you.
marcial@foundeross.comI read everything. I answer each one myself. Most conversations do not become engagements. When a bank is the right answer, you will hear that too.