Corey has made an announcement about Matter over on its Medium publication:

I’m proud of the impact we’ve made, the team we’ve built, and the people and organizations that we have transformed. But now it’s time for me to flare.

For the last two years I have tried to secure Matter’s future. While I succeeded at figuring out how to successfully expand Matter and its unique culture to NYC and to tranform Matter into an organization that could continue to operate if I were hit by a bus, I have yet to successfully raise Matter Fund III and we’ve come to the end of our runway.

I've had the privilege of being on many sides of the Matter table. My third startup, Known, was funded by it, and I took part in the third accelerator class. I was a mentor and occasional advisor. And then I was asked to join the team and was the west coast Director of Investments. (I had an abstract ambition to one day come back as an LP, completing the set, but oh well.)

When I discovered Matter, it felt like an oasis: here was an accelerator that wanted to make the world more informed, empowered, and connected. An investment community that prized empathy and inclusivity. And rather than talking about this vaguely, or staying at 30,000 feet, the hands-on accelerator process was designed to give entrepreneurs the tools they needed to test their assumptions and succeed in the real world. It was Corey's process, and it worked - both for the entrepreneurs who took part in it, and for the media partners like KQED and the Associated Press who used it to improve their own internal innovation.

It changed my life.

Not just by teaching me the principles of human-centered venture design, although it did do that. Not just by taking a bet on my work, although I will always be grateful. But more than anything else, by introducing me to an amazing community of people who I'm proud to call my friends - and then allowing me to help build it.

It was meaningful work that allowed me to use every part of myself. It pushed me in ways I'd never been pushed before, and in the same way that participating in the accelerator transformed the way I'll build products and ventures forever, I am a much better person for having worked on that team. It was very far from just being a job. I worked and cried with founders late into the night. I helped some of the world's biggest media institutions work on their most existential problems. I helped bring Chelsea Manning to demo day. And I did it as part of a group of people who I still can't believe I got to be part of. Years later, I honestly still can't believe my luck.

I'm very grateful to Corey for founding this community, which I believe I'll be part of for the rest of my life. In the same way people talk about the PayPal Mafia, I think people will start talking about the Matter Underground in media circles: people who were part of the Matter community, changed by its values, and then went on to change media and technology for good. That also goes for the incredible people I worked with, which certainly includes Corey. I wish him the best in whatever he chooses to do next, and I can't wait to hear about it.

I'll finish by including this photo, which I stole from his post. It represents my single proudest moment in my professional career to date: the day that a group of people that I helped source, select and invest in walked through the garage door. Each one of them had a mission with the potential to create a more informed, inclusive, and empathetic society. And each of them was an amazing individual who I'm proud to know.

Corey's full post is here.