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✦ Knowledge & Growth

The Planet Positive Magazine

Insights, exits, and impact reports from the frontlines of sustainable startup investing.

Latest Insights

Why I’m Watching Airthium (YC S17) — The Y Combinator-Backed Startup Electrifying Industrial Heat

Every product you own was made with heat. Airthium has built a containerized, plug-and-play heat pump that connects to existing factory boilers — no disruption, no overhaul. Backed by Y Combinator and a $4M French government grant. Their community round is open now on Wefunder.

Airthium containerized industrial heat pump — plug-and-play electrified heat for factories
2026 CfPA Regulated Investment Crowdfunding Summit Bronze Sponsor The Crowdfunding Return Gap: Why We Back Side-By-Side Offerings (And How SEC Rule 3a-9 Changes Everything)

Over 1 million Americans entered equity crowdfunding, but retail-only rounds have lagged the S&P 500. Ahead of his panel at the 2026 CfPA Summit, Mark Perlmutter breaks down how PPI’s Interlocked SPV™ lets everyday investors co-invest on identical institutional terms starting at $100.

Sempresto smartphone-integrated epinephrine autoinjector MagSafe The Epi-Pen That Lives on Your Phone: Why I’m Watching Sempresto’s Community Round

Over 33 million Americans have food allergies, yet fewer than 40% carry their autoinjector. Sempresto built an epinephrine device that snaps directly onto your smartphone via MagSafe — so it goes where you go, always. Red Dot Award winner. Positive FDA Pre-IND response.

Beyond Donating and Buying Organic: The Radical Impact of Owning Climate Equity Beyond Donating & Grocery Cart Activism: The Radical Impact of Owning Climate Equity

Donating is great. Voting with your dollar matters. But owning equity in the solutions rebuilding our planet? That is radical impact. Here is how everyday people can back game-changing startups starting at $100.

Oshi whole-cut plant-based salmon fillet Whole-Cut Plant-Based Salmon: Inside Oshi’s Modular Layering Technology

Oshi has patented a “Modular Layering” process that builds plant-based salmon fillets layer by layer — replicating the texture and flake of wild-caught fish. Backed by the VCs behind Oatly & Impossible Foods.

EcoSave Technologies EST CORE™ clean water technology Why I'm Backing EcoSave Technologies

Their EST CORE™ technology strips 99.99% of toxins from waterways at the source. After 14 years of real-world proof, I think this might be one of the more important companies we've ever featured.

Precision agriculture the nature-positive economy The $10 Trillion “Nature-Positive” Economy

The energy transition is old news. The next decade of planet-positive investing is being built on precision farms, alternative proteins, and biodiversity tech — a sector projected to generate over $10 trillion in annual business value.

Sustainable Burger Opening How One Passionate Vegan Turned $100 Into a Movement

Decades after a quiet decision to stop eating meat, Mark Perlmutter’s conviction became Planet Positive Investing — a free club of 30,450+ members backing planet-positive startups.

Wind Harvest International vertical-axis wind turbines Wind Harvest Signs $80M+ Deal with Chair Capital

Chair Capital committed up to $80 million-plus to help scale Wind Harvest International’s vertical-axis turbines — and the implications go way beyond one company’s balance sheet.

rHealth Blood Test Used in Space

Mark Perlmutter shares why he is impressed with rHealth, a startup delivering handheld, lab-quality blood diagnostic devices.

GACW wheel Cleaner Lithium, Better Wheels

Mark Perlmutter shares how GACW is solving a massive mining waste issue at the intersection of EVs and lithium mining.

A Small Win Worth Sharing

20/20 BioLabs debuts on Nasdaq Capital Market under ticker AIDX, marking a key milestone for CF investors.

20/20 BioLabs
Fueling the Future with Sprouted Snacks

Founder Mark Perlmutter shares how firefighter-turned-entrepreneur Rich Pauwels is scaling sprouted organic snacks.

Rich Nuts
Blackbird Foods Acquired by Ahimsa

How a plant-based roll-up strategy is helping alternative protein brands scale logistics and distribution.

Blackbird Foods
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By the Numbers
30K+
Members
30+
Deals
$0
Fees
$100
Min. invest
About the Curator
Mark Perlmutter

Mark Perlmutter

Founder & CEO

Stockbroker pioneer turned vegan impact advocate, democratizing early-stage climate and food technology deals for everyday people.

Our Mission
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