$RARE

Horn Howard sold $111K of RARE

Horn Howard (Chief Financial Officer) sold 4,653 shares of Ultragenyx Pharmaceutical Inc. (RARE) at $23.77 ($0.11M total) on 2026-06-01 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Horn Howard
Published Jun 1, 2026, 11:11 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Jun 1, 2026, 11:16 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.
AlphAI market briefInsider activity
Primary signal
$RARE
Neutral
high confidence
Mentioned
$RARE
Relevance
6/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$RARENeutralLow
01

Why it matters

The disclosed sale is a mechanical disclosure rather than a fundamental update; absent other catalysts, it is unlikely to change valuation drivers.

02

Market read

Insider selling disclosure for RARE with limited incremental trading signal due to 10b5-1 pre-arrangement and lack of new business information.

03

What to watch

The filing does not reveal the broader context (e.g., total insider activity over prior months, tax-related selling, or diversification needs).

Relevance 6/10Novelty 3/10Timing: Filed today (2026-06-01) for an insider sale executed the same day.

Background

SEC Form 4 reports insider transactions; this one is an officer/direct sale under a pre-arranged Rule 10b5-1 plan.

Company-level read

Ticker impact

$RARENeutralHigh confidence
Context

Ultragenyx CFO Horn Howard sold 4,653 shares in an open-market transaction at $23.77 on a pre-arranged 10b5-1 plan.

Expected impact

Low likelihood of a sustained price move solely from this Form 4; any reaction would be muted unless paired with other company-specific news.

Evidence & confidence

Form 4 insider sales are typically informational but not necessarily bearish, especially when explicitly executed under a pre-arranged 10b5-1 plan and without accompanying guidance/trial/contract updates.

Market effects

Minimal; single-company Form 4 insider sale does not reset sector expectations.

None indicated.

None indicated.

Counterpoint

Even 10b5-1 sales can coincide with management confidence gaps; traders may still interpret repeated insider selling as a risk signal if it accelerates.

Key entities

  • Horn Howard

    Ultragenyx CFO who sold 4,653 shares under a pre-arranged 10b5-1 plan.

  • Ultragenyx Pharmaceutical Inc.

    RARE, the company whose shares were sold by its CFO.

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.

Related articles

$RAREMedAI 8/10

Ultragenyx Pharmaceutical (RARE) Sells $203M Priority Review Vou

Ultragenyx Pharmaceutical (RARE) sold a $203M priority review voucher tied to its gene therapy Fayuvi's FDA approval, marking its second such sale this month. The company's P/S ratio is 2.1, below its historical median of 15.7, reflecting market skepticism. Its GF Score™ is 48/100, indicating mixed financial health. Insiders have sold $3.7M in shares over the past year.