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sellWeak cluster of 410b5-1 plan

Howard Horn sold $111k of RARE

Chief Financial Officer at Ultragenyx Pharmaceutical Inc.. 4,653 shares at an average of $23.77, traded Jun 1, 2026, filed Jun 1, 2026.

Warning score
27
Value
$111k
4,653 shares
Holdings after
105,689
-4% from before
From 52-week low
+24%
low $18.50, close $22.85
From 52-week high
-45%
high $41.44, as of Jun 1, 2026

Score components

  • Role
    CFO
    +22
  • Trade size
    $111k at market
    +10
  • Share of holdings sold
    Sold 4.2% of holdings
    0
  • Cluster
    4 insiders selling within 14 days
    +15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

RAREOct 12, 2026 · close 15.30
Since filing Jun 1, 2026: -33.0%SPY +3.1% · excess -36.1%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001786335-26-000002, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jun 1, 2026SOpen-market sale
Common Stock10b5-1
-4,653$23.77$111k105,689Jun 1, 2026

Related signals

Other insiders at Ultragenyx Pharmaceutical Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
0Weak
RAREsell10b5-1
Ultragenyx Pharmaceutical Inc.
Theodore Alan Huizenga
SVP, Chief Accounting Officer
$17k
1,283 shares
-2%
15Weak
RAREsell
Ultragenyx Pharmaceutical Inc.
Theodore Alan Huizenga
SVP, Chief Accounting Officer
$2,252
161 shares
-0%
20Weak
RAREsell 210b5-1
Ultragenyx Pharmaceutical Inc.
Howard Horn
Chief Financial Officer
$117k
4,696 shares
-5%
9Weak
RAREsell 210b5-1
Ultragenyx Pharmaceutical Inc.
Karah Herdman Parschauer
EVP and Chief Legal Officer
$47k
1,900 shares
-2%
13Weak
RAREsell10b5-1
Ultragenyx Pharmaceutical Inc.
Howard Horn
Chief Financial Officer
$156k
4,698 shares
-4%
16Weak
RAREsell 310b5-1
Ultragenyx Pharmaceutical Inc.
Karah Herdman Parschauer
EVP and Chief Legal Officer
$47k
1,899 shares
-2%
37Weak
RAREsell 3
Ultragenyx Pharmaceutical Inc.
Corazon (Corsee) D. Sanders
director
$50k
2,000 shares
-9%
26Weak
RAREsell 310b5-1
Ultragenyx Pharmaceutical Inc.
Shehnaaz Suliman
director
$144k
5,740 shares
-17%
30Weak
RAREsell 3
Ultragenyx Pharmaceutical Inc.
Eric Crombez
EVP and Chief Medical Officer
$8,586
344 shares
-0%
20Weak
RAREsell 210b5-1
Ultragenyx Pharmaceutical Inc.
Howard Horn
Chief Financial Officer
$117k
4,683 shares
-4%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.