---
title: "C3is (CISS) Stock Surges Over 16% After Hours: Why is it Moving?"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/294921448.md"
description: "C3is Inc. (CISS) shares surged 16.57% after hours to $0.10, reversing a 21.34% regular session decline. The rally followed SEC filings revealing new institutional stakes: Alta Partners LLC acquired an 8.2% position, and CVI Investments Inc. disclosed a 9.9% stake. Trading volume spiked to 67.91 million shares, significantly above average."
datetime: "2026-08-05T05:35:05.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/294921448.md)
  - [en](https://longbridge.com/en/news/294921448.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/294921448.md)
generator: "portal-rs"
---

# C3is (CISS) Stock Surges Over 16% After Hours: Why is it Moving?

**C3is Inc.** (NASDAQ:CISS) shares jumped 16.57% to $0.10 after the bell on Tuesday.

In the regular session, shares of the Greece-based shipping company closed at $0.088, down 21.34%, according to Benzinga Pro data.

C3is experienced an elevated trading session on Tuesday. Volume reached 67.91 million shares, about 3.16 times the stock’s average daily volume of 21.48 million shares.

## **SEC Filings Reveal Fresh Institutional Bets**

The stock move comes after a Monday **Securities and Exchange Commission** filing revealed that venture capital firm **Alta Partners LLC** owns an 8.2% stake, or 1.16 million shares, including 28,303 shares associated with warrants.

In a separate SEC filing on the same day, private investment firm **CVI Investments Inc.**, managed by **Heights Capital Management Inc.**, disclosed a 9.9% stake totaling 1.22 million shares. This includes 980,000 common shares and shares linked to warrants, with ownership limited to the 9.99% threshold.

In late July, C3is priced a $6 million underwritten public offering of 11.54 million units.

## Trading Metrics, Technical Analysis

C3is has a market capitalization of $1.07 million, with a 52-week high of $830.20 and a 52-week low of $0.08.

The Relative Strength Index (RSI) of CISS stands at 15.42.

Over the past 12 months, the stock has declined 99.98%.

**Benzinga’s Edge Stock Rankings** indicate that CISS has a negative price trend across all time frames.

***Disclaimer:*** *This content was partially produced with the help of AI tools and was reviewed and published by Benzinga editors.*

 **Read Also: AppLovin (APP) Stock Jumps Over 3% After Hours: Here's Why It Is Trending** 

*Photo Courtesy: MMD Creative on Shutterstock.com*

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> **Disclaimer: This article is for reference only and does not constitute any investment advice.**