InsiderSignal.AI

InsiderSignal.ai

PLMR - Palomar Holdings, Inc.

Insider Sale by Armstrong Mac (CEO, COB)

1 Month
After Trade
Before Trade

Loading data...

Trade Summary

2 days ago, Armstrong Mac, serving as CEO, COB at Palomar Holdings, Inc. (PLMR), sold 3,500 shares at $130.77 per share, for a total transaction value of $457,680.00. Following this transaction, Armstrong Mac now holds 438,447 shares of PLMR.

This sale represents a 1.00% decrease in Armstrong Mac's stake in the company. This is considered a medium-conviction trade.

The trade was executed on Tuesday, April 21, 2026 and publicly disclosed via SEC Form 4 filing on Wednesday, April 22, 2026, 1 day after the trade was made.

Palomar Holdings, Inc. operates in the FINANCIAL SERVICES sector, specifically within the INSURANCE - PROPERTY & CASUALTY industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.

Armstrong Mac

CEO, COB

Mac Armstrong, also known as David McDonald Armstrong, is the co-founder, Chief Executive Officer (CEO), Chairman of the Board (COB), and director of Palomar Holdings, Inc. (PLMR), a specialty insurance provider focused on catastrophe-exposed property insurance, since its founding in February 2014.[[1]](https://matrixbcg.com/blogs/owners/plmr)[[2]](https://plmr.com/about/)[[4]](https://simplywall.st/stocks/us/insurance/nasdaq-plmr/palomar-holdings/management) Headquartered in La Jolla, California, Palomar has grown substantially under his leadership, with gross written premiums reaching $1.5 billion for the year ended December 31, 2024.[[1]](https://matrixbcg.com/blogs/owners/plmr) Armstrong recently sold 4,999 shares on December 22, 2025, valued at $681,139, through the Armstrong Family Trust, retaining significant holdings indirectly and directly.[[3]](https://www.investing.com/news/insider-trading-news/palomar-holdings-ceo-mac-armstrong-sells-681k-in-shares-93CH-4421617) Prior to Palomar, Armstrong served as President of Arrowhead General Insurance Agency from 2009, after roles as CFO and COO, leading its sale to Brown & Brown, Inc. in 2012.[[1]](https://matrixbcg.com/blogs/owners/plmr)[[2]](https://plmr.com/about/) His earlier career includes leading the insurance investing practice at Spectrum Equity Investors and positions at Alex. Brown & Sons/BT Alex. Brown Inc., an investment bank.[[2]](https://plmr.com/about/) He holds an A.B. from Princeton University and serves on the Board of Advisors of Cloverlay Investment Management LLC.[[2]](https://plmr.com/about/)

View full insider profile →

Trade Price

$130.77

Quantity

3,500

Total Value

$457,680.00

Shares Owned

438,447

Trade Date

Tuesday, April 21, 2026

2 days ago

SEC Filing Date

Wednesday, April 22, 2026

Filed 1 day after trade

FINANCIAL SERVICESINSURANCE - PROPERTY & CASUALTY

About Palomar Holdings, Inc.

Company Overview

No company information available
View news mentioning PLMR

💬 Want Deeper Insight?

Use our AI assistant to ask questions about this trade, the insider, or the company.

Chat with AI

Share this trade

https://insidersignal.ai/trade/5854354

🚀 Track Insider Trades in Real-Time

Create a free account to access our full database of insider trades, AI-powered analysis, price alerts, and discover what corporate executives are buying and selling.

Create Free AccountLearn More

✓ Free forever plan available  •  ✓ No credit card required  •  ✓ Cancel anytime