# David Blumberg: angel investments and portfolio > David Blumberg is an angel. 3 investments on record, latest May 2014. Portfolio, stages, co-investors and team. Source: https://millionrounds.com/fund/david-blumberg (Millionrounds; every figure on the page links to its filing or article) [Investor](https://millionrounds.com/investors) # David Blumberg Last cheque observed May 2014. Silence since then is not evidence of inactivity: our sources miss unannounced rounds. Quiet Angel Seed Series A Cheques on record **0%** of best year **0** **cheques in 12 months**, 3 on record Since the last cheque **4545** days **00** hrs **00** min **00** sec Median round **$1.1M** Rounds led **0 of 3** Exits **1 from the portfolio** Pitch David Blumberg ## David Blumberg highlights - 01 3 rounds on record - 02 Mostly Seed and Series A: 100% of its rounds - 03 1 exits from the portfolio ## What they do - **Type:** Angel (from a list, unverified) - **Cheque size:** Not stated - **Cold pitches:** Not stated ## The record Every round we can evidence, newest first **3 appearances** - **2014** 1 round - **May** **[ZipZap](https://millionrounds.com/company/zipzap)** Seed · US **$1.1M** With 7 others - **2011** 2 rounds - **Sept** **[isocket](https://millionrounds.com/company/isocket)** Seed · US **Undisclosed** With 3 others - **Sept** **[isocket](https://millionrounds.com/company/isocket)** Series A · US · techcrunch.com **Undisclosed** With 3 others An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor. ## Exits from the portfolio Companies it backed that were later bought or listed **1 in all** **[isocket](https://millionrounds.com/company/isocket)** Bought by Rubicon Project **Undisclosed** Nov 2014 An exit counts when it came after the firm's first round in the company. From historical deal records. ## The cheque Seed Series A Median round joined **$1.1M** the round, not its cheque Led 0 of 3 rounds **0%** - **Sole investor:** Never alone - **Last cheque:** May 2014 - **Exits:** 1 from the portfolio Rounds by stage said on their site - Seed *2* - Series A *1* Cheques by year Led Joined 2011 2014 Often in the room with - [David Cohen](https://millionrounds.com/fund/david-cohen) 2 **Pitching David Blumberg?** Put them on your fundraising board with this record on the card, and follow them to hear when they write a new cheque. Add to your CRM *→* ## Who they invest alongside The investors most often in the same rounds as David Blumberg. A count of rooms they were both in, not a relationship either has claimed. [**David Cohen** Angel **2** rounds together](https://millionrounds.com/fund/david-cohen) ## Mentioned on podcasts Episodes that name David Blumberg in their description, not their title. - [How I Invest](https://millionrounds.com/podcasts/how-i-invest) 4 Jun 2026 · 32 min E383:Why the Next Fortune 500 Companies Will Be Built on AI Mentions [Blumberg Capital](https://millionrounds.com/fund/blumberg-capital)[David Blumberg](https://millionrounds.com/fund/david-blumberg) Apple PodcastsShow page ## Quick answers about David Blumberg ### What does David Blumberg invest in? David Blumberg invests most often at Seed and Series A (100% of the rounds on record). ### How active is David Blumberg? 3 investments on record, 0 of them in the last 12 months. The most recent was in May 2014. ### How big are David Blumberg's cheques? The median round it joins is $1.1M. ### Is David Blumberg investing now? No investments in the last 12 months; the latest was in May 2014. ### Who does David Blumberg invest alongside? Most often David Cohen (2 rounds together). ### What kind of investor is David Blumberg? David Blumberg is an angel. ### Where does this information on David Blumberg come from? From 1 articles and filings naming it in a round, public registers and its own website, checked and rebuilt every night. ## Raising now? Find the investors who back rounds like yours, and keep every conversation on one fundraising board. Find similar investorsOpen your CRM Built from the rounds we watched, its filings and its own website, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections?slug=david-blumberg) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=david-blumberg)