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Ultragenyx Pharmaceutical Inc. planned insider sales

In the last twelve months insiders at Ultragenyx Pharmaceutical Inc. filed 16 Form 144 notices of planned sales, 59,807 shares worth $1.5 million at the time of filing, from 5 sellers. The latest, filed 15 September 2026: Theodore Huizenga (officer), 1,283 shares worth $17,462, planned for around 15 September 2026 through Morgan Stanley Smith Barney LLC Executive Financial Services.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
15 September 2026Theodore HuizengaOfficer1,283$17,46215 September 20261,283 shares from 15 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesEmployee Stock Purchase Plan; Performance Stock Units; Restricted Stock UnitsForm 144
3 August 2026Howard HornOfficer4,696$117,0243 August 202611,762 shares from 3 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock and Performance SharesForm 144
1 July 2026Howard HornOfficer4,698$155,6451 July 20264,698 shares from 1 July 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Shares; Restricted StockForm 144
15 June 2026Corazon D. SandersDirector2,000$50,10015 June 20262,000 shares from 15 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
15 June 2026Karah ParschauerOfficer3,799$92,50615 June 20263,799 shares from 15 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock UnitsForm 144
1 June 2026Howard HornOfficer4,653$110,6021 June 20264,653 shares from 1 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance and Restricted StockForm 144
18 May 2026Shehnaaz SulimanDirector5,740$144,18918 May 20265,740 shares from 18 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
1 May 2026Howard HornOfficer4,683$116,6071 May 20264,683 shares from 1 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Shares; Restricted StockForm 144
1 April 2026Howard HornOfficer4,683$98,2031 April 20264,683 shares from 1 April 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Shares; Restricted StockForm 144
10 March 2026Karah ParschauerOfficer3,508$79,52610 March 20263,508 shares from 10 March 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
6 March 2026Karah ParschauerOfficer6,018$128,7756 March 20266,018 shares from 6 March 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Shares; Restricted StockForm 144
3 March 2026Howard HornOfficer1,635$36,6243 March 202610,044 shares from 2 March 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Shares; Restricted StockForm 144
2 March 2026Howard HornOfficer3,119$70,3022 March 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
2 February 2026Howard HornOfficer3,061$72,1172 February 20263,061 shares from 2 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
2 January 2026Howard HornOfficer3,150$71,9462 January 20263,150 shares from 2 January 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
10 December 2025Howard HornOfficer3,081$112,08710 December 20253,081 shares from 10 December 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Sold, per Form 4: the same seller's open-market sales on Form 4 from the notice's date to 90 days after, added up, as they appear on the insiders page; a holder who files no Form 4, such as some large holders, never shows one. What is a Form 144?