Neuralink, Elon Musk’s brain implant startup, discreetly raises an additional $43 million in venture capital


  • Neuralink secures an additional $43 million in venture capital, increasing total funding to $323 million.
  • The company’s valuation, last estimated at $5 billion, remains undisclosed.
  • Neuralink’s innovative brain implant technology includes wireless, high-electrode count implants.
  • It gains FDA approval for human clinical trials but faces allegations of a toxic workplace culture.
  • Unethical research practices, including the mistreatment of animals, have drawn criticism.
  • U.S. lawmakers request an SEC investigation into alleged omission of animal deaths.

Main AI News:

In a subtle move that speaks volumes about its continued growth, Neuralink, the pioneering brain implant startup founded by tech mogul Elon Musk, has quietly secured an additional $43 million in venture capital. The company, which is focused on developing implantable chips capable of decoding brain waves, revealed this significant financial milestone in a recent filing with the Securities and Exchange Commission (SEC).

This latest funding round represents an extension of Neuralink’s previous tranche, initially led by Peter Thiel’s Founders Fund. The infusion of capital has propelled the company’s financial backing from $280 million to a formidable $323 million. Impressively, a total of thirty-two investors eagerly participated in this financing round, underscoring the growing interest and confidence in Neuralink’s groundbreaking work.

While Neuralink has opted not to disclose its current valuation, it is worth noting that as of June, the company was estimated to be valued at approximately $5 billion following private stock transactions. Since its inception in 2016, Neuralink has made remarkable strides, notably pioneering a sewing machine-like device designed for the delicate task of implanting ultra-thin threads into the human brain. These threads are intricately connected to a specialized chip housing electrodes, enabling the reading of data from clusters of neurons.

The field of brain-signal-reading implants is not new, with a history spanning decades. However, Neuralink’s standout innovation lies in its ability to render these implants wireless while significantly increasing the number of electrodes that can be implanted. This revolutionary approach has garnered attention not only from investors but also from regulatory bodies.

In May, Neuralink achieved a significant milestone when it received FDA approval for human clinical trials, overcoming previous setbacks in the approval process. The company has since initiated its first human trials, conducted under an investigational device exemption granted by the FDA. Nevertheless, as Neuralink continues to push the boundaries of science and technology, it finds itself under heightened scrutiny.

Critics have raised concerns about the company’s workplace culture, alleging a toxic environment marked by a “culture of blame and fear.” Reports have suggested that Elon Musk himself played a role in undermining management by encouraging junior employees to communicate issues and complaints directly to him. Additionally, tensions arose within the company due to the inherent conflict between ambitious timelines and the gradual pace of scientific progress.

Furthermore, allegations of unethical research practices have cast a shadow over Neuralink’s endeavors. In 2022, the Physicians Committee for Responsible Medicine (PCRM) accused Neuralink and its former research partner, UC Davis, of mistreating monkeys involved in testing Neuralink hardware. These allegations included subjecting the animals to psychological distress and chronic infections stemming from surgical procedures. Reports indicated that rushed testing, driven by Musk’s desire for rapid results, resulted in complications during electrode installation, leading to partial paralysis and brain swelling.

For nearly a year, Neuralink faced a federal investigation by the U.S. Department of Agriculture (USDA) concerning potential animal welfare violations during its trials. Ultimately, the USDA concluded that aside from a previously reported incident from 2019, there was “no evidence” of animal welfare breaches in Neuralink’s trials. However, the PCRM challenged the results of the investigation, keeping the controversy alive.

In a development that further underscores the challenges Neuralink faces, U.S. lawmakers in November 2023 called upon the SEC to investigate the company for allegedly omitting critical information regarding the deaths of a dozen animals that had undergone surgical implantation of its devices.


Neuralink’s ability to secure substantial additional funding highlights investor confidence in its groundbreaking work at the intersection of technology and neuroscience. However, the company must address concerns surrounding its workplace culture and research ethics to maintain its reputation and navigate the complex path ahead. The market for brain implant technology remains promising, but ethical considerations and regulatory scrutiny will continue to shape its evolution.