# Saemin Ahn

> Saemin Ahn is a Series A investor at Rakuten backing Mobile and Internet. See 3 investments, check sizes, portfolio and contact details. Updated Sep 2026.

- Type: Angel Investor
- Fund: [Rakuten](https://shizune.co/investors/profile/rakuten)
- Location: Singapore, Singapore
- Total investments: 3
- Last investment: Jan 2016
- Lead investor: 100%
- Last updated: Sep 2026
- LinkedIn: https://www.linkedin.com/in/saeminahn
- X (Twitter): http://twitter.com/Saemin4655
- Website: https://x.com/Saemin4655

Saemin Ahn is a Series A investor at Rakuten in Singapore focused on Mobile and Internet. Saemin Ahn is the Managing Partner, Rakuten Ventures at Rakuten. Saemin Ahn attended Sogang University.

## Contacts

5 contacts available for Saemin Ahn: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/saemin-ahn?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Mobile | 2 | 67% |
| Internet | 1 | 33% |
| Software | 1 | 33% |
| Real Time | 1 | 33% |
| Advertising | 1 | 33% |

9 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 2 | 67% |
| Seed | 1 | 33% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| South Korea | 1 | 33% |
| United States | 1 | 33% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Estmob | Estmob is a creator behind Send Anywhere. Send Anywhere takes an easy, quick, and unlimited approach to file sharing. Easily, it allows you to send any file type, across any platform, all without having to sign up or log on. Quickly, it sends files via the optimal transfer path given network conditions. As for unlimited, you can send any file size,as many times as you want, for free. | $6M | Series A | Jan 20, 2016 |  |
| Pocketmath | PocketMath is the world's largest, self-serve, mobile advertising platform for buying programmatic real-time bidding (RTB) inventory. We make it easy to buy smartphone and tablet ad impressions, within apps, games, and mobile websites, all in real-time. In one platform, you gain immediate access to the world's supply of mobile RTBinventory!One platform, the world's mobile programmatic inventory.No minimums. No commitments. No set up costs. Full transparency.PocketMath is located in Singapore, San Francisco, Austin, Washington, D.C., Mumbai, and Sydney - with a burgeoning presence in China + Japan.PocketMath was started three years ago by three friends who met nearly a decade past while students at the University of Texas at Austin. Eric, JD, and Casey came together to solve a need recognized in the digital advertising space. After many iterations, a year (or two!), several prototypes, and countless meetings, PocketMath was born as a mobile demand-side platform (DSP) to bid for mobile RTB inventory. | $10M | Series A | Nov 24, 2014 |  |
| Estmob | Estmob is a creator behind Send Anywhere. Send Anywhere takes an easy, quick, and unlimited approach to file sharing. Easily, it allows you to send any file type, across any platform, all without having to sign up or log on. Quickly, it sends files via the optimal transfer path given network conditions. As for unlimited, you can send any file size,as many times as you want, for free. | $1M | Seed | May 12, 2014 |  |

3 of 3 investments shown.

## About Rakuten

VC Fund · Tokyo, Japan

Rakuten is a tech company that offers electronic commerce solutions in Japan and internationally. The company operates in three segments such as internet services, finance services, and others.The internet services segment comprises businesses running various e-commerce sites, including Rakuten Ichiba, an internet shopping mall; travel bookingsites; portal sites; and e-book businesses as well as businesses for advertising and sale of contents and similar on these sites.Its offerings include e-reading, online travel reservations, online auctions, online marketing, online golf course reservations, portal sites, search engines, integrated internet marketing, online recipe posting and browsing, student recruiting community, online purchase of discount coupons, online shopping, and video on demand services. It is involved in the online sale of books, CDs, and DVDs.The internet finance segment is engaged in providing services related to banking and securities, credit cards, life insurance, and electronic money. This segment provides credit card payment, internet banking, online brokerage, online comprehensive insurance, and face-to-face and online life insurance services as well as credit card transactions on smartphones and tablets.The other segments are involved in the provision of communications services such as next-generation LTE-compatible mobile data communication, telecommunications, internet connection and corporate mobile phone services, and management of a professional baseball team.The company was formerly known as MDM, Inc. and changed its name to Rakuten, Inc. in June 1999. Rakuten, Inc. was founded in 1997 and is headquartered in Tokyo, Japan.

5 contacts available at Rakuten.

| Name | Title | Profile |
| --- | --- | --- |
| Hiroshi Mikitani | Chairman and President, Chief Operating Officer | https://shizune.co/investors/profile/hiroshi-mikitani |
| Masatada Kobayashi | Group Managing Executive Officer & Chief Well-Being Officer | https://shizune.co/investors/profile/masatada-kobayashi |
| Masayuki Hosaka | Representative Director and Vice Chairman | https://shizune.co/investors/profile/masayuki-hosaka |
| Michael Piechalak | Partner, Rakuten Capital | https://shizune.co/investors/profile/michael-piechalak |
| Saemin Ahn | Managing Partner | https://shizune.co/investors/profile/saemin-ahn |

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## FAQ

### What does Saemin Ahn invest in?

Saemin Ahn invests primarily in Mobile, Internet and Software startups, most often at Series A and Seed stage. Most of the 3 investments tracked by Shizune back companies in South Korea. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Saemin Ahn?

Public channels for Saemin Ahn include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### When did Saemin Ahn last invest?

The most recent investment recorded for Saemin Ahn closed in Jan 2016. Shizune tracks 3 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 Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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