---
title: "TransDigm Founder Nicholas Howley Has Sold $1.26 Billion in TDG Stock Across 3,515 Transactions"
type: news
slug: howley-tdg-1-26-billion-career-insider-sales
canonical_url: https://13finsight.com/news/howley-tdg-1-26-billion-career-insider-sales
published_at: 2026-03-01T17:06:51.648Z
updated_at: 2026-03-23T07:05:07.151Z
author: Alex Rivera
author_title: Breaking News Editor
author_url: https://13finsight.com/authors/alex-rivera
word_count: 287
locale: en
source: 13F Insight
---

# TransDigm Founder Nicholas Howley Has Sold $1.26 Billion in TDG Stock Across 3,515 Transactions

> W. Nicholas Howley, the founder and former CEO of TransDigm Group, has filed 3,515 insider transactions selling $1.26 billion in TDG and related stock — most recently in November 2025 at $1,340+ per share.

W. Nicholas Howley, the founder of TransDigm Group (TDG), has filed 3,515 insider transactions over his career — selling $1.26 billion in stock while buying back just $5 million. His most recent sale came in November 2025 at prices above $1,340 per share, netting approximately $559,000 in a single day. The Numbers Metric Value Career Sell Value $1.26B Career Buy Value $5.0M Total Transactions 3,515 Last Transaction 2025-11-24 Shares Remaining (TDG) 21,547 Recent Activity DateTypeSharesPriceEst. Value 2025-11-24Gift746,767N/AN/A (PRM) 2025-11-17Sell20$1,348.07$26,961 2025-11-17Sell83$1,347.53$111,845 2025-11-17Sell87$1,344.78$116,996 2025-11-17Sell61$1,343.82$81,973 2025-11-17Sell56$1,341.99$75,152 Howley’s November 2025 activity shows two distinct patterns: small-lot TDG sales at prices above $1,340 per share, and a large gift of 746,767 shares in Perimeter Solutions (PRM). The TDG sales — split across many micro-lots — are characteristic of a 10b5-1 preset trading plan. What It Means Howley founded TransDigm in 1993 and built it into one of aerospace’s most profitable companies through an aggressive acquisition strategy — buying niche aerospace component makers and raising prices. He served as CEO until 2018 and remained Executive Chairman before transitioning to a director role. The company’s stock has been one of the best-performing industrials, rising from under $50 at its 2006 IPO to over $1,300 today. The $1.26 billion in career sales represents a remarkable return on a company Howley built from scratch. His $5 million in purchases suggests minimal open-market buying — the overwhelming majority of his shares came through founder equity and compensation grants. What to Watch Whether Howley’s TDG selling cadence continues into 2026 as shares trade near all-time highs His large Perimeter Solutions position — the 746K share gift suggests significant PRM holdings remain TransDigm’s acquisition pipeline and defense spending trends Any changes in Howley’s board involvement or 10b5-1 plan amendments

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Source: 13F Insight — https://13finsight.com/news/howley-tdg-1-26-billion-career-insider-sales
Author: Alex Rivera — https://13finsight.com/authors/alex-rivera
Last updated: 2026-03-23T07:05:07.151Z