# Sterling Witzke

> Sterling Witzke is a seed investor at Winklevoss Capital (New York) backing E-Commerce and Mobile. See 51 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Winklevoss Capital](https://shizune.co/investors/profile/winklevoss-capital)
- Location: New York, United States
- Total investments: 51
- Last investment: Aug 2020
- Lead investor: 2%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/sterlingwitzke
- X (Twitter): https://twitter.com/SterlingWitzke
- Website: https://x.com/SterlingWitzke

Sterling Witzke is a Partner at Winklevoss Capital.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| E-Commerce | 8 | 16% |
| Mobile | 6 | 12% |
| Software | 5 | 10% |
| Logistics | 5 | 10% |
| Retail | 4 | 8% |

92 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 27 | 53% |
| Series A | 10 | 20% |
| Funding Round | 6 | 12% |
| Series B | 4 | 8% |
| Series C | 1 | 2% |

7 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 40 | 78% |
| United Arab Emirates | 1 | 2% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| BlockFi | BlockFi is a secured non-bank lender that offers USD loans to crypto-asset owners who collateralize the loan with their crypto-assets. Their products bring additional liquidity to the blockchain asset sector and meet the needs of both individuals and institutions holding blockchain assets. BlockFi holds clients' Bitcoin and Ether with aregistered custodian and issues loans in USD to their bank accounts. Currently operating in beta launch, lending in 35 US states to retail investors and companies.BlockFi’s mission is to provide liquidity, transparency, and efficiency to digital financial markets by creating products that meet the needs of consumers and corporations across the globe. They leverage a sophisticated infrastructure that integrates with multiple blockchains, they plan to expand their product set based on their retail and institutional client's needs. | $50M | Series C | Aug 20, 2020 |  |
| BlockFi | BlockFi is a secured non-bank lender that offers USD loans to crypto-asset owners who collateralize the loan with their crypto-assets. Their products bring additional liquidity to the blockchain asset sector and meet the needs of both individuals and institutions holding blockchain assets. BlockFi holds clients' Bitcoin and Ether with aregistered custodian and issues loans in USD to their bank accounts. Currently operating in beta launch, lending in 35 US states to retail investors and companies.BlockFi’s mission is to provide liquidity, transparency, and efficiency to digital financial markets by creating products that meet the needs of consumers and corporations across the globe. They leverage a sophisticated infrastructure that integrates with multiple blockchains, they plan to expand their product set based on their retail and institutional client's needs. | $30M | Series B | Feb 13, 2020 |  |
| TaxBit | TaxBit is a cryptocurrency tax and accounting software that automates tax calculations and reporting on cryptocurrency transactions. With TaxBit, users can link their exchanges and wallets to seamlessly pull their transactions through their tax engine and auto-generate tax forms.Aside from automating taxes, TaxBit provides crypto enthusiastsreal-time portfolio tracking and tax optimization visibility so that they can make tax-optimized crypto trades throughout the year. TaxBit connects the consumer and enterprise cryptocurrency tax experiences. | $5M | Seed | Jan 06, 2020 |  |
| Bitski | Bitski is a developer-focused platform that simplifies the creation, sale, and purchase of NFTs for creators, brands, and platforms. By connecting communities through ownable digital content, Bitski aims to make blockchain technology accessible to mainstream brands and celebrities. | $1.8M | Seed | Nov 13, 2019 |  |
| BlockFi | BlockFi is a secured non-bank lender that offers USD loans to crypto-asset owners who collateralize the loan with their crypto-assets. Their products bring additional liquidity to the blockchain asset sector and meet the needs of both individuals and institutions holding blockchain assets. BlockFi holds clients' Bitcoin and Ether with aregistered custodian and issues loans in USD to their bank accounts. Currently operating in beta launch, lending in 35 US states to retail investors and companies.BlockFi’s mission is to provide liquidity, transparency, and efficiency to digital financial markets by creating products that meet the needs of consumers and corporations across the globe. They leverage a sophisticated infrastructure that integrates with multiple blockchains, they plan to expand their product set based on their retail and institutional client's needs. | $18.3M | Series A | Aug 06, 2019 |  |
| Koio | Koio Collective is a consumer goods company that offers calf-skin leathers and hand-finished footwear for gents and ladies. The company is driven by its mission is to to create their personal dream shoe, one that would accompany them on any quest and adapt to any situation. The company was founded in 2014 and headquartered in New York, UnitedStates. | $3M | Series A | Apr 11, 2018 |  |
| Minibar Delivery | Minibar Delivery provides on-demand delivery of wine, spirits, beer & mixers. We give users a better way to shop; connecting them with their local liquor store to offer the best selection of products. You order food with a tap, book a car from an app, and now get your alcohol in a snap! Minibar Delivery is live in New York, Los Angeles, SanFrancisco, Chicago, Washington DC, Miami, Dallas among 30+ other cities. MINIBARDELIVERY.com | $5M | Seed | Aug 15, 2017 |  |
| Filecoin | Filecoin is a data storage network and electronic currency based on Bitcoin. | $52M | Initial Coin Offering | Aug 10, 2017 |  |
| Teachable | Teachable (formerly Fedora) is changing education by making it easy to teach or sell courses online. Teacher entrepreneurs use Teachable to run their own courses work with almost half a million students online. In a matter of minutes, Teachable allows you to create a beautiful and powerful, payment-ready course from your own website without anytechnical knowledge. While many use Teachable for asynchronous video-based classes teachers have used it to sell books, services, offline-online classes, group coaching, tutoring and webinars. | $4M | Series A | Jan 25, 2017 |  |
| SPIDR Tech | SPIDR Tech gives law enforcement agencies the technology they need to provide people with the service they deserve.WIth SPIDR Tech's community relationship management platform, law enforcement agencies are able to use their own data to automate customer service and marketing functionalities. This results in enormous cost savings and hugeimprovements in public perception. |  |  | Jun 22, 2016 |  |

10 of 51 investments shown.

## Co-investors
- [Y Combinator](https://shizune.co/investors/profile/y-combinator) — VC Fund, 5 deals together
- [Valar Ventures](https://shizune.co/investors/profile/valar-ventures) — VC Fund, 4 deals together
- [Avon Ventures](https://shizune.co/investors/profile/avon-ventures) — VC Fund, 3 deals together
- [CMT Digital](https://shizune.co/investors/profile/cmt-digital-ventures-llc) — VC Fund, 3 deals together
- [Maiden Lane Ventures](https://shizune.co/investors/profile/maiden-lane-ventures) — VC Fund, 3 deals together
- [Morado Ventures](https://shizune.co/investors/profile/morado-ventures-partners) — VC Fund, 3 deals together

## About Winklevoss Capital

VC Fund · New York, United States

Winklevoss Capital Management partners with a select number of early stage companies to provide investment with a full service approach to driving growth.

3 contacts available at Winklevoss Capital.

| Name | Title | Profile |
| --- | --- | --- |
| Cameron Winklevoss | Principal | https://shizune.co/investors/profile/cameron-winklevoss |
| Sterling Witzke | Partner | https://shizune.co/investors/profile/sterling-witzke |
| Tyler Winklevoss | Co-Founder and Partner | https://shizune.co/investors/profile/tyler-winklevoss |

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## FAQ

### What does Sterling Witzke invest in?

Sterling Witzke invests primarily in E-Commerce, Mobile and Software startups, most often at Seed and Series A stage. Most of the 51 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Sterling Witzke last invest?

The most recent investment recorded for Sterling Witzke closed in Aug 2020. Shizune tracks 51 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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