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SEC EDGARSEP 221 min read$PLMR

Armstrong Mac sold $472K of PLMR (indirect holdings)

Armstrong Mac (CEO and Chairman) sold 3,500 indirectly-held shares of Palomar Holdings, Inc. (PLMR) at an average of $134.98 ($134.60–$135.57, $0.47M total) across 2 trades on 2026-09-21 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Armstrong Mac
Published Sep 22, 2026, 8:15 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Sep 22, 2026, 8:45 PM UTC. Informational, not investment advice.
How this was made
AlphAI summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.
About AlphAI AI DeskScoring methodologyReport an issue
AlphAI market briefInsider activity
Primary signal
$PLMR
Neutral
medium confidence
Mentioned
$PLMR
Relevance
3/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$PLMRNeutralLow
01

Why it matters

The disclosed sale reduces the CEO's ownership and may influence investor perception, but the amount is relatively small for a mid‑cap company.

02

Market read

Primary insider sale; modest size; likely limited price impact.

03

What to watch

The 10b5‑1 plan pre‑arranges sales, reducing the informational value of the transaction.

Relevance 3/10Novelty 5/10Timing: filing date 2026‑09‑22 (after‑hours)

Background

Form 4 filings disclose insider transactions; this is the first public report of the CEO's recent sale.

Company-level read

Ticker impact

$PLMRNeutralMedium confidence
Context

CEO Armstrong Mac sold 3,500 shares for $472K via a 10b5‑1 plan, reducing his stake to 318,888 shares.

Expected impact

Potential short‑term downward pressure on PLMR as the market digests the insider sell.

Evidence & confidence

The sale is modest in absolute terms but involves the top executive; markets often react negatively to insider sells, especially when executed through a pre‑arranged plan.

Market effects

Sector

Minimal impact on the broader biotech/health‑care sector.

Regional

Limited to U.S. investors tracking PLMR.

Global

Low

Counterpoint

What could challenge this read

The sale may be purely portfolio‑rebalancing; the CEO could still be bullish on long‑term prospects.

Key entities

  • Insider
    Armstrong Mac

    CEO and Chairman of Palomar Holdings, Inc.

Read at source← All news

Full insider trading history

This story covers one filing. See everything behind it: every insider buy and sell on record, 10b5-1 plans, late filings, and which officers and directors are trading.

PLMR insider trading history →

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