# ClearSky: portfolio, investments and team > ClearSky is a vc firm based in United States. 8 investments on record, 1 in the last 12 months, latest Sept 2026. Portfolio, stages, co-investors and team. Source: https://millionrounds.com/fund/clearsky (Millionrounds; every figure on the page links to its filing or article) United States · [Investor](https://millionrounds.com/investors) # ClearSky Last cheque observed Sep 2026; 8 cheques on record. Email Deploying now New fund $58M, Nov 2025 VC firm Seed Series A Series B Cybersecurity Energy Transition Follow ClearSky and see its new cheques in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Ffund%2Fclearsky) Deploying now **100%** of best year **1** **cheques in 12 months**, 8 on record Since the last cheque **58** days **00** hrs **00** min **00** sec Median round **$28M** Rounds led **3 of 8** Sole investor **1 rounds** Mostly in **United States, 88%** Pitch ClearSky ## ClearSky highlights - 01 1 cheques in the last 12 months - 02 Mostly Series B and Series A: 63% of its rounds - 03 Sole investor in 1 rounds, median $25M ## What they do > ClearSky is a venture capital and growth equity firm investing in innovative companies in the cybersecurity and energy transition sectors From their own website - **Type:** VC firm (from a list, unverified) - **Cheque size:** Not stated - **Stages:** Seed Series A Series B Growth Pre-IPO - **Sectors:** Cybersecurity Energy Transition - **Based in:** West Palm Beach, United States - **Cold pitches:** Not accepted ## The record Every round we can evidence, newest first **8 appearances** - **2026** 1 round - **Sept** **Lasso Security** Series A · IL · Ventureburn **$30M** *Led* - **2019** 4 rounds - **Dec** **[CyberGRX](https://millionrounds.com/company/cybergrx)** Series D · US · FinSMEs **$40M** With 11 others - **Sept** **[Skout Cybersecurity](https://millionrounds.com/company/skout-cybersecurity)** Series B · US · Prnewswire **$25M** *Led* - **Sept** **[SecZetta](https://millionrounds.com/company/seczetta)** Series A · US · FinSMEs **$10M** *Led* - **Apr** **[CloudGenix](https://millionrounds.com/company/cloudgenix)** Series C · US · FinSMEs **$65M** With 4 others - **2018** 2 rounds - **Nov** **[CyberGRX](https://millionrounds.com/company/cybergrx)** Series C · US · FinSMEs **$30M** With 7 others - **Jun** **[Preempt](https://millionrounds.com/company/preempt)** Series B · US · FinSMEs **$18M** With 3 others - **2017** 1 round - **Apr** **[CyberGRX](https://millionrounds.com/company/cybergrx)** Series B · US · FinSMEs **$20M** With 6 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. ## The team Named by the firm itself, on a filing, its Form ADV or its company registration **10 named** AW **Alexander Weiss** Managing Director i Filing they signed CE **Charlie Einsmann** Manager of Clear Sky Management, LLC, Manager i Filing they signed CC **Christopher Crow** Manager of the Managing Member i Filing they signed DZ **Dain Zaitz** Manager of the Managing Member i Filing they signed ES **Erik Straser** Director i Filing they signed JH **James Huff** Managing Director i Filing they signed JL **Jay Leek** Director i Filing they signed PK **Peter Kuper** Director i Filing they signed SJ **Samuel Jacknin** Manager of Clear Sky Management, LLC, Manager i Filing they signed SF **Steven Foster** Managing Director i Filing they signed We also hold **18** people at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them. ## What the register says From the firm's own filings with the SEC, which it must file accurately by law **$716M** gross assets of its funds Oct 2026 **Exempt** reporting adviser venture or small private funds - **Legal name:** Clearsky Advisors LLC - **SEC number:** CRD 326951 ## What they claim to have backed From their own portfolio page (on their website) **0** of 1 we have independently watched raise Investor Portal Weaker than a round we watched, stronger than a list somebody sold us. A firm is far less willing to put a company on its own site that it never funded. New fund on file **$58M** raised in Nov 2025 From its SEC filing, not a journalist: a firm that has just raised has money to deploy. ## The cheque Seed Series A Series B Median round joined **$28M** the round, not its cheque Alone, median **$25M** Led 3 of 8 rounds **38%** - **Sole investor:** 1 rounds - **Last cheque:** Sept 2026 Rounds by stage said on their site - Series B said *3* - Series A said *2* - Series C *2* - Series D *1* - Seed said *-* - Growth said *-* - Pre-IPO said *-* Cheques by month Led Joined Nov 2023 Oct 2026 Often in the room with - [Google Ventures](https://millionrounds.com/fund/gv) 3 - [MassMutual Ventures](https://millionrounds.com/fund/massmutual-ventures) 3 - [AllegisCyber](https://millionrounds.com/fund/allegiscyber) 2 - [Blackstone Group](https://millionrounds.com/fund/blackstone-group) 2 - [Rally Ventures](https://millionrounds.com/fund/rally-ventures) 2 - [Ten Eleven](https://millionrounds.com/fund/ten-eleven) 2 **Pitching ClearSky?** 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 ClearSky. A count of rooms they were both in, not a relationship either has claimed. [**Google Ventures** Corporate VC **3** rounds together](https://millionrounds.com/fund/gv)[**MassMutual Ventures** VC firm **3** rounds together](https://millionrounds.com/fund/massmutual-ventures)[**AllegisCyber** VC firm **2** rounds together](https://millionrounds.com/fund/allegiscyber)[**Blackstone Group** Private equity **2** rounds together](https://millionrounds.com/fund/blackstone-group)[**Rally Ventures** VC firm **2** rounds together](https://millionrounds.com/fund/rally-ventures)[**Ten Eleven** VC firm **2** rounds together](https://millionrounds.com/fund/ten-eleven) ## Recently backed The latest companies ClearSky put money into. [**CyberGRX** $40M · Dec 2019](https://millionrounds.com/company/cybergrx)[**Skout Cybersecurity** $25M · Sept 2019](https://millionrounds.com/company/skout-cybersecurity)[**Preempt** $18M · Jun 2018](https://millionrounds.com/company/preempt) ## Quick answers about ClearSky ### What does ClearSky invest in? ClearSky invests most often at Series B and Series A (63% of the rounds on record), in sectors such as Cybersecurity and Energy Transition. ### How active is ClearSky? 8 investments on record, 1 of them in the last 12 months, and it led 3. The most recent was in Sept 2026. ### What has ClearSky invested in recently? Its most recent investments on record: Lasso Security (Series A, Sept 2026), CyberGRX (Series D, Dec 2019) and Skout Cybersecurity (Series B, Sept 2019). ### How big are ClearSky's cheques? The median round it joins is $28M. ### Does ClearSky lead rounds? Yes: it led 3 of its 8 investments on record (38%). ### Where does ClearSky invest? Most of the companies it backs are in the United States (88%) and Israel (13%). ### Is ClearSky investing now? Yes: it is actively investing, with 1 investments in the last 12 months. ### Who does ClearSky invest alongside? Most often Google Ventures (3 rounds together), MassMutual Ventures (3 rounds together) and AllegisCyber (2 rounds together). ## 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=clearsky) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=clearsky)