Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Ultragenyx Pharmaceutical Inc.

RARE · Nasdaq · CIK 0001515673 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

19 Form 4 transaction lines observed in the same window
11 sales · 8 option, withholding, award, gift or other lines

Last qualifying purchaseNo qualifying purchase is present in the local Form 4 history.

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Horn HowardChief Financial Officer
▼▼▼▼
Huizenga Theodore AlanSVP, Chief Accounting Officer
○▼▼
Sanders Corazon (Corsee) D.Director
○▼
Parschauer Karah HerdmanEVP and Chief Legal Officer
▼▼
SULIMAN SHEHNAAZDirector
○▼
Ray AmritDirector
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 5 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot.—

Recent Form 4 activity

0Purchases
27Sales
24Other Form 4 lines
39SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING11 sale line(s) · context only
OTHER8 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
20,349,877
Previous report
16,571,956
Avg daily volume
6,502,013
Days to cover
3.1

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

No qualifying code P equity purchase is present in the local Form 4 history.

Form 4 evidence

51 transaction lines in the latest 365-day window; 474 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-15Huizenga Theodore AlanSale (S)Common Stock1,283USD 13.57USD 17,410SEC filing ↗
2026-09-03Huizenga Theodore AlanSale (S)Common Stock161USD 13.99USD 2,252SEC filing ↗
2026-08-03Parschauer Karah HerdmanSale (S)Common Stock1,900USD 24.92USD 47,348SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-15Huizenga Theodore AlanSale (S)Common Stock1,283USD 13.57USD 17,410SEC filing ↗
2026-09-03Huizenga Theodore AlanSale (S)Common Stock161USD 13.99USD 2,252SEC filing ↗
2026-08-03Parschauer Karah HerdmanSale (S)Common Stock1,900USD 24.92USD 47,348SEC filing ↗
2026-08-03Horn HowardSale (S)Common Stock4,696USD 24.92USD 117,024SEC filing ↗
2026-07-01Horn HowardSale (S)Common Stock4,698USD 33.13USD 155,645SEC filing ↗
2026-06-15Sanders Corazon (Corsee) D.Sale (S)Common Stock2,000USD 25.05USD 50,100SEC filing ↗
2026-06-15Parschauer Karah HerdmanSale (S)Common Stock1,899USD 24.62USD 46,753SEC filing ↗
2026-06-01Horn HowardSale (S)Common Stock4,653USD 23.77USD 110,602SEC filing ↗
2026-05-18SULIMAN SHEHNAAZSale (S)Common Stock5,740USD 25.12USD 144,189SEC filing ↗
2026-05-14WELCH DANIEL GAward / grant (A)Common Stock7,751USD 0.00USD 0SEC filing ↗
2026-05-14Sanders Corazon (Corsee) D.Award / grant (A)Common Stock7,751USD 0.00USD 0SEC filing ↗
2026-05-14SULIMAN SHEHNAAZAward / grant (A)Common Stock7,751USD 0.00USD 0SEC filing ↗
2026-05-14Ray AmritAward / grant (A)Common Stock7,751USD 0.00USD 0SEC filing ↗
2026-05-14NARACHI MICHAELAward / grant (A)Common Stock7,751USD 0.00USD 0SEC filing ↗
2026-05-14Fust Matthew KAward / grant (A)Common Stock7,751USD 0.00USD 0SEC filing ↗
2026-05-14Dunsire DeborahAward / grant (A)Common Stock7,751USD 0.00USD 0SEC filing ↗
2026-05-05Crombez EricSale (S)Common Stock344USD 24.96USD 8,586SEC filing ↗
2026-05-01Horn HowardSale (S)Common Stock4,683USD 24.90USD 116,607SEC filing ↗
2026-04-22Huizenga Theodore AlanAward / grant (A)Common Stock20,241USD 0.00USD 0SEC filing ↗
2026-04-16Pinion John RichardAward / grant (A)Common Stock23,116USD 0.00USD 0SEC filing ↗
2026-04-16Parschauer Karah HerdmanAward / grant (A)Common Stock28,895USD 0.00USD 0SEC filing ↗
2026-04-16KAKKIS EMIL DAward / grant (A)Common Stock76,745USD 0.00USD 0SEC filing ↗
2026-04-16Huang Dennis KarlAward / grant (A)Common Stock23,116USD 0.00USD 0SEC filing ↗
2026-04-16Horn HowardAward / grant (A)Common Stock34,674USD 0.00USD 0SEC filing ↗
2026-04-16Harris ErikAward / grant (A)Common Stock28,895USD 0.00USD 0SEC filing ↗
2026-04-16Crombez EricAward / grant (A)Common Stock34,674USD 0.00USD 0SEC filing ↗
2026-04-01Horn HowardSale (S)Common Stock4,683USD 20.97USD 98,203SEC filing ↗
2026-03-10Parschauer Karah HerdmanSale (S)Common Stock3,508USD 22.67USD 79,526SEC filing ↗
2026-03-06Parschauer Karah HerdmanSale (S)Common Stock6,018USD 21.40USD 128,785SEC filing ↗
2026-03-03Horn HowardSale (S)Common Stock1,635USD 22.40USD 36,624SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerRARE
CIK0001515673
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history474 transaction lines from 2020-01-14 to 2026-09-15
0 P purchase lines · 198 S sale lines · 276 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.