Tesla‘s chief financial officer, Zach Kirkhorn, stepped down from his position effective Friday, the automaker announced Monday morning in a regulatory filing. Tesla’s chief accounting officer, Vaibhav Taneja, was appointed as the new CFO and will hold both roles concurrently.
Shares of Tesla were trading down nearly 3% on the news.
Kirkhorn will stay on with Tesla through the end of the year to assist in the transition, according to a Securities and Exchange Commission filing. Kirkhorn had served as CFO since March 2019 and had worked for Tesla since 2010.
“As I shift my responsibilities to support this transition, I want to thank the talented, passionate, and hard-working employees at Tesla, who have accomplished things many thought not possible,” Kirkhorn wrote on LinkedIn.
Kirkhorn’s departure marks the second CFO replacement at Tesla in just over four years. When prior finance chief Deepak Ahuja left Tesla in 2019, the company’s shares dipped as much as 4.5%.
Taneja, Kirkhorn’s successor and Tesla’s chief accounting officer, has been with the automaker since 2017. He worked for SolarCity before joining Tesla, by way of the automaker’s $2.6 billion acquisition of the solar installer. Before that, Taneja was employed at PwC for about 17 years. PwC is Tesla’s auditor.
Waymo partners with Uber to bring robotaxi service to Atlanta and Austin.
Uber Technologies Inc.
Alphabet’sWaymo unit will begin test-driving robotaxis at its first California-based airport, the company said Thursday.
The autonomous car unit has been cleared to begin testing driverless rides at the San José Mineta International Airport in San Jose, California, this fall. Waymo said it plans to offer paid rides at the airport later this year.
“With San José at the epicenter of the biggest sporting events of 2026, Waymo is an ideal mode of transportation that will help visitors move around the area smoothly and safely,” San José Mayor Matt Mahan said in a release.
The vehicles will pick up passengers at the Ground Transportation Centers in Terminal A or B and roll out to locations in Waymo’s San Francisco Bay Area service area, according to the release.
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Once fully operational, it will be the second international airport where the company has service.
In 2023, Waymo launched at Phoenix Sky Harbor International Airport, which has become the most popular Waymo destination in its Phoenix metropolitan service area, a Waymo spokesperson said Thursday.
Waymo has continued to expand its driverless, ride-hailing service across the U.S. after already launching commercial operations in Austin, Texas, as well as Atlanta, San Francisco, Phoenix and Los Angeles.
In March, Waymo expanded its service to include an additional 27 square miles of coverage around the San Francisco Bay Area, including Mountain View, Palo Alto and San Jose.
Bret Taylor, chairman of the board of directors of OpenAI, attends the annual Allen and Co. Sun Valley Media and Technology Conference at the Sun Valley Resort in Sun Valley, Idaho, on July 8, 2025.
David A. Grogan | CNBC
Bret Taylor’s artificial intelligence startup Sierra has just joined an exclusive club: The company sports a new $10 billion valuation after raising $350 million in fresh capital.
Sierra is one of just a handful of AI startups, including OpenAI, Anthropic, xAI, Safe Superintelligence and Thinking Machines that are valued at or above $10 billion.
Investors are pouring money into this competitive group of companies in the hopes that they’ll eventually hit the public markets.
Taylor is the chairman of OpenAI’s board, and previously served as co-CEO of Salesforce alongside Marc Benioff. Taylor co-founded Sierra in 2023. The company builds and implements AI agents for customer service. AI agents can carry out tasks autonomously on behalf of their users.
Shares of Salesforce fell 5% Thursday after the company reported weak guidance and concerns lingered about how AI is affecting software companies.
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Sierra said its agents are already being used by “hundreds of millions of people” to help with tasks like refinancing homes, ordering lunch, delivering furniture, understanding insurance deductibles and fixing technology, among other things.
Greenoaks led Sierra’s latest funding round, the company said. Its valuation more than doubled from its most recent raise in October.
“We’re in this for the long term,” Sierra said in a blog post on Thursday.
The company said it will use its fresh funding to invest in its platform and focus on domestic and international expansion.
Sierra’s funding follows a flurry of other major AI raises in Silicon Valley. Earlier this week, Anthropic announced it had closed a $13 billion funding round at a $183 billion post-money valuation.
Broadcom is scheduled to report earnings for its fiscal third quarter after the close of regular trading on Thursday.
Here’s what analysts are expecting, according to a consensus from LSEG.
Earnings per share: $1.65
Revenue: $15.83 billion
Broadcom, which develops custom chips for Google and other huge cloud companies and also makes networking gear needed to tie thousands of artificial intelligence chips together, is expected to report revenue growth of 21% from $13.07 billion a year ago.
Analysts project revenue growth will hold steady the rest of this year and accelerate a bit in 2026.
Broadcom has been one of the chief beneficiaries of the AI boom thanks largely to its accelerator chips, which the company calls XPUs. The processors are generally simpler and less expensive to operate than Nvidia’s graphics processing units, or GPUs, and they’re designed to run specific AI programs efficiently.
Analysts at Cantor Fitzgerald wrote in a report last week that they expect to see increased signs of demand from Google and Meta.
“Additionally, all eyes will turn towards any visibility of current AI Custom Silicon engagements converting into customers with high-volume ramps in sight,” wrote the analysts, who recommend buying the stock.
The analysts estimate that custom silicon could generate $25 billion to $30 billion in revenue for Broadcom next year and more than $40 billion by around 2027. The company generated total revenue of $51.6 billion in the latest fiscal year.
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Shares of Broadcom are up 30% this year and have almost doubled in the past 12 months, lifting the company’s market cap to $1.4 trillion.
In the fiscal second quarter, AI revenue jumped 46% from a year earlier to more than $4.4 billion, with 40% from networking. CEO Hock Tan said that number should reach $5.1 billion in the third quarter, “as our hyperscale partners continue to invest.”
Some of Broadcom’s expansion has been fueled by acquisitions, most notably the purchase of server virtualization software vendor VMware for $61 billion in 2023. VMware is key to Broadcom’s infrastructure software business, which accounted for 44% of sales in the most recent quarter.