---
title: "Insider Moves: Mammoth Energy Director Quietly Boosts Stake in Bold New Buy"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/299390263.md"
description: "Mammoth Energy Services director Mark Lawrence Plaumann purchased 5,000 shares worth $15,000 on September 17, 2026, signaling confidence in the company. TipRanks' AI analyst rates TUSK as Neutral, citing strong technical momentum and raised 2026 guidance against ongoing net losses and volatile cash flow. The stock has gained 63.24% year-to-date with a market cap of $146.3M."
datetime: "2026-09-18T02:03:38.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/299390263.md)
  - [en](https://longbridge.com/en/news/299390263.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/299390263.md)
generator: "portal-rs"
---

# Insider Moves: Mammoth Energy Director Quietly Boosts Stake in Bold New Buy

New insider activity at Mammoth Energy Services ( (TUSK) ) has taken place on September 17, 2026.

Director Mark Lawrence Plaumann has increased his stake in Mammoth Energy Services by purchasing 5,000 shares of the company’s stock in a recent transaction. The buy, valued at $15,000 in total, highlights a fresh vote of confidence from inside the boardroom toward Mammoth Energy Services’ future prospects.

**Spark’s Take on TUSK Stock**

According to Spark, TipRanks’ AI Analyst, TUSK is a Neutral.

The score reflects strong technical momentum and a notably upbeat earnings outlook (raised 2026 guidance and improving adjusted EBITDA), balanced against weaker core financials—ongoing net losses and materially negative, volatile operating/free cash flow. Low leverage supports flexibility, but execution and cash-generation consistency remain the main constraints on a higher score.

To see Spark’s full report on TUSK stock,  
 click here. 

**More about Mammoth Energy Services**

**YTD Price Performance:** 63.24%

**Average Trading Volume:** 262,656

**Technical Sentiment Signal:** Buy

**Current Market Cap:** $146.3M

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