---
title: "Lumentum, Coherent fall after hedge fund manager Aschenbrenner dumps his holdings"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/286811426.md"
description: "Shares of Lumentum and Coherent fell sharply after investor Leopold Aschenbrenner revealed his fund sold its holdings in these companies. Lumentum dropped 11% and Coherent over 6%, despite previous gains of 120% and 80% respectively this year. Aschenbrenner's actions also boosted T1 Energy shares and included a bearish bet against Nvidia, which recently invested $4 billion in Lumentum and Coherent."
datetime: "2026-05-18T19:40:59.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/286811426.md)
  - [en](https://longbridge.com/en/news/286811426.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/286811426.md)
---

# Lumentum, Coherent fall after hedge fund manager Aschenbrenner dumps his holdings

Shares of Lumentumand Coherent plunged Monday after ex-OpenAI researcher-turned-investor Leopold Aschenbrenner disclosed his Situational Awareness fund exited his holdings in those companies during the first quarter.

By the afternoon, Lumentum was down 11% and Coherent was down over 6%. The losses are relatively small compared to the over 120% and 80% gains the AI infrastructure companies had put up respectively since January.

The two companies are developers of phonetics and optical equipment which help data centers and AI hyperscalers transmit data.

Aschenbrenner's firm Situational Awareness is making major market ripples today, also sending shares of T1 Energy soaring on news he bought the stock.

He also made a bearish bet against Nvidia, which recently invested $4 billion ($2 billion each) into Lumentum and Coherent.

### Related Stocks

- [NVDA.US](https://longbridge.com/en/quote/NVDA.US.md)
- [COHR.US](https://longbridge.com/en/quote/COHR.US.md)
- [LITE.US](https://longbridge.com/en/quote/LITE.US.md)
- [SMH.US](https://longbridge.com/en/quote/SMH.US.md)
- [SOXX.US](https://longbridge.com/en/quote/SOXX.US.md)
- [SOXL.US](https://longbridge.com/en/quote/SOXL.US.md)
- [XSD.US](https://longbridge.com/en/quote/XSD.US.md)
- [FTXL.US](https://longbridge.com/en/quote/FTXL.US.md)
- [PSI.US](https://longbridge.com/en/quote/PSI.US.md)
- [TE.US](https://longbridge.com/en/quote/TE.US.md)
- [TE+.US](https://longbridge.com/en/quote/TE+.US.md)
- [NVD.DE](https://longbridge.com/en/quote/NVD.DE.md)

## Related News & Research

- [Here's How Much $100 Invested In Coherent 20 Years Ago Would Be Worth Today](https://longbridge.com/en/news/286180090.md)
- [Here's why Astera Labs' stock just staged a big gain](https://longbridge.com/en/news/286969770.md)
- [This Analyst Just Raised the Price Target on Coherent Stock by 50%. What to Know.](https://longbridge.com/en/news/285995397.md)
- [iA Global Asset Management Inc. Has $7.55 Million Stock Position in Lumentum Holdings Inc. $LITE](https://longbridge.com/en/news/286746983.md)
- [Lumentum General Counsel Jae Kim disposes 2,838 shares worth $2.71 million](https://longbridge.com/en/news/286979085.md)