William P Barnes Profile
William P Barnes

@williampbarnes

Followers
15K
Following
969
Media
8
Statuses
526

here for the football... operator turned investor, first 50 @uber - built west coast ops

Santa Monica, California
Joined July 2008
Don't wanna be here? Send us removal request.
@williampbarnes
William P Barnes
1 month
👀.
@IlyaAbyzov
Ilya Abyzov
1 month
@scottbelsky For folks who are interested in a product that does this: Currently in closed beta and adding waves of new testers every couple of days. DM me or add your name on the site if you want to give it a try.
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@williampbarnes
William P Barnes
2 months
Making headlines! Pumped to see 7 amazing companies we invested in featured on the @CNBCDisruptors 50 list for 2025. Huge congrats to:. @anduriltech at (No. 1).@OpenAI at (No. 2).@Flock_Safety at (No. 7) – via @FlyAerodome.@metropolisio at (No. 13).@GrubMarket at (No. 20).
@CNBCDisruptors
CNBC Disruptors
2 months
CNBC’s 13th annual #Disruptor50 list of the most innovative private companies represents the new gen AI era, which began transforming the list in 2023, and hasn’t slowed down since.
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@grok
Grok
8 days
Generate videos in just a few seconds. Try Grok Imagine, free for a limited time.
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@williampbarnes
William P Barnes
3 months
🚀 Proud to announce our investment in @Coworkerapp’s $13M seed round! . Coworker’s enterprise AI agent can handle complex tasks across company apps and data, powered by a revolutionary new memory architecture. @ATCalder & @HeresTheChurch were stars at Uber; now they’re
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@williampbarnes
William P Barnes
3 months
If you want to automate your prompt engineering and save 1000 hours this year - see below. Excited to be an investor with @tomas_hk.
@tomas_hk
Tomas Hernando Kofman
3 months
Today we’re launching Prompt Adaptation, a state-of-the-art agentic system that automatically adapts prompts across LLMs. Prompt Adaptation outperforms all other methods and significantly improves accuracy over manual prompt engineering, saving you thousands of hours per year.
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@williampbarnes
William P Barnes
4 months
Congrats to @0interestrates and the team - @JuliusAI_ .is your AI data scientist.
@0interestrates
rahul
4 months
Our biggest update so far: We're excited to announce Collaboration in @JuliusAI_ . Julius is now your team's AI Data Analyst with built-in realtime collaboration. Check it out below
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@williampbarnes
William P Barnes
5 months
hardly surprising -- each incremental city will scale faster than the pervious due to higher existing installed userbase. do people in SF know people in LA? Do people in LA travel to SF? Duh!! obvi!. the core issue is. does waymo supply to peak or trough demand? If waymo.
@aleximm
Alex Immerman
5 months
Waymo is gaining share faster in LA than in SF. As awareness grows, each new city rollout (PHX to SF to LA) has seen a faster ramp. LA is a top 5 GMV rideshare market. When Waymo launched there in April 2024, Uber and Lyft were at 69% and 31% share. 10 months later, Waymo
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@williampbarnes
William P Barnes
6 months
sounds about right!.
@amralshihabi
Amr (عمرو) Al-Shihabi
6 months
I said no to Uber. At first. I needed a Green Card and it wasn’t stapled to my offer. It was 2013 and I was:. - A young Arab man in a post-9/11 America.- Tired of getting held at airports.- Still too dumb to just ask for what I wanted. Luckily, @williampbarnes (who I’d just.
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@williampbarnes
William P Barnes
6 months
life changing opportunity. .
@moizali
Moiz Ali
6 months
I'm hoping to start/incubate two eCommerce brands. Basically, I have two businesses I want to build but can't be the CEO of because I don't have the time. - Are you a PSD? See photo attached. - Do you have 5+ years of experience at a small eCommerce business where you were
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@williampbarnes
William P Barnes
6 months
just like seatbelts, abs, air-conditioning, central locking and every other auto-motive technology -- lvl 4 (FSD) -- is going to be in every car. $TSLA edge is not FSD, it's their manufacturing capacity and @elonmusk - ability to focus the company on a 1st principles low cost.
@SawyerMerritt
Sawyer Merritt
6 months
NEWS: Morgan Stanley analyst Adam Jonas said he was left "speechless" after he spent an hour this week being driven in a robotaxi in London. Adam rode in a development vehicle from Wayve that used 7 cameras, no radar, no LIDAR, no HD maps and no labeling. It was all end-to-end
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@williampbarnes
William P Barnes
6 months
👀.
@amralshihabi
Amr (عمرو) Al-Shihabi
6 months
📣 Feb job drop — sharing a batch of great new opportunities in engineering, design, marketing, and ops. If you’re a job seeker, February is the best month to find a new opportunity (per research by recruitment agency Hays). Ride the momentum by checking out open positions at.
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@williampbarnes
William P Barnes
6 months
Every parent I know says “no FSD with kids in the car. ”.
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@williampbarnes
William P Barnes
6 months
so we have @altcap / @treiner5 short and @BillAckman long $UBER. I love this app! 🍿👀.
@BillAckman
Bill Ackman
6 months
Beginning in early January, we began acquiring a position in @Uber. Today, we own 30.3 million shares. I have been a long-term customer and admirer of Uber beginning when Edward Norton showed me the app in its early days. I was also fortunate to be a day-one investor in the.
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@williampbarnes
William P Barnes
6 months
RT @_balaji_km: In @Uber’s earnings slides and prepared remarks this quarter we went deeper on our AV strategy. We believe AV can open up a….
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@williampbarnes
William P Barnes
6 months
👀.
@_balaji_km
Balaji Krishnamurthy
6 months
@45WallSt @dkhos @andrewgordonmac Hi! Difference between point in time buyback and SBC over the full year should be obvious, but to make it obvious we will buy back much more than the SBC cost this year. Read our earnings materials, will help a lot. By the way, share count starts shrinking in Q1. Do the math.
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@williampbarnes
William P Barnes
7 months
🚗🤖.
@_balaji_km
Balaji Krishnamurthy
7 months
Safety is a critical pillar for AV progress. Interesting context from the Mobileye earnings call. “We have been test driving the Tesla FSD version 13. And we have strong conviction that our EyeQ6 platform will greatly exceed whatever we experience with the FSD version 13. And I.
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@williampbarnes
William P Barnes
7 months
RT @amralshihabi: The most valuable thing about @Uber wasn't the app. It was the engineering & product talent factory that's now powering….
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@williampbarnes
William P Barnes
7 months
RT @HarryStebbings: “Travis’ firing is the greatest value destruction that's happened since firing Steve Jobs at Apple.”. The best podcasts….
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@williampbarnes
William P Barnes
9 months
Money for nothing and your Knicks for free! . Hi @Jason followers!! 🎁.
@Jason
@jason
9 months
People always wonder what to get me as a gift… anything dire straits or Knicks makes me smile. @williampbarnes bought me a vintage dire straits baseball cap from the 80s recently, and I wear it around and smile every time. … I also like eating Peking duck with my friends 🦆.
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@williampbarnes
William P Barnes
9 months
There are many good reasons why everyone speaks so highly of @emilmichael. Honoured to call him a friend and a mentor! Would be a huge win for the DoT to have him involved!
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@williampbarnes
William P Barnes
11 months
demand aggregation is a helluva drug!
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