William Geist

Managing Partner, Upper90
William Geist uses hybrid equity and non-dilutive financing for tech firms seeking efficient scaling, bringing a quantitative, risk-focused mindset from investment banking, M&A, public markets and CFA.
How to contact William Geist
Stages their fund invests in
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Sectors their fund invests in
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Avg Check
$5M - $10M
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Does their fund Lead?
No
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Geos their fund invests in
USA
William Geist
Stages their fund invests in
N/A
Sectors their fund invests in
Fintech
Ecommerce
Logistics
Marketplaces
SaaS
N/A
Avg Check
$5M - $10M
N/A
Leads?
No
N/A
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About William Geist

William Geist is a managing partner at Upper90 who specializes in hybrid financing that combines equity and non-dilutive capital for technology companies focused on efficient scaling rather than growth at all costs. His background spans investment banking, M&A, and public markets along with his CFA designation, giving him a more quantitative and risk-focused approach to venture investing than traditional early-stage VCs.

About their Fund

Sectors
Fintech, Ecommerce, Logistics, Marketplaces, SaaS
Rounds
Seed - Series A
Avg Check Size
$5M - $10M

Upper90 is a hybrid credit and equity fund that requires both components in every deal, allowing them to structure bespoke credit against specific revenue streams while helping founders "skip or delay your Series A" to retain more ownership. Their LP base consists of 300+ founders and operators who drive deal sourcing, and they focus on data-predictable cash-flow businesses where they can provide large credit lines (sometimes 10x+ the equity raised) against predictable revenue streams.

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