SEC Insider Transactions from Huang Dennis Karl.

Last updated: 2026-03-14 11:55 UTC | Total transactions: 15

Huang Dennis Karl has filed 15 insider transactions across 1 company since March 2023.

Most recent transaction: a tax payment of 999 shares of Ultragenyx Pharmaceutical Inc. ($RARE) on March 02, 2026.

Activity breakdown: 0 open-market purchases and 1 sale.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
March 2, 2026 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks F Common Stock 999 $23.39 124,729.0000 98,600,000 0.79% 0.00%
March 1, 2026 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks A Common Stock 11137 $0.00 125,728.0000 98,600,000 9.72% 0.01%
March 1, 2025 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks A Common Stock 18443 $0.00 115,939.0000 90,538,118 18.92% 0.02%
March 3, 2025 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks F Common Stock 1348 $42.92 114,591.0000 90,538,118 1.16% 0.00%
March 1, 2025 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks A Stock Option (Right to Buy) 26074 $0.00 26,074.0000 90,538,118 9999.99% 0.03%
March 1, 2025 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks A Common Stock 14494 $0.00 97,496.0000 90,538,118 17.46% 0.02%
March 1, 2024 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks F Common Stock 470 $53.69 83,002.0000 73,543,862 0.56% 0.00%
March 1, 2024 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks A Stock Option (Right to Buy) 31400 $0.00 31,400.0000 73,543,862 9999.99% 0.04%
March 1, 2024 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks A Common Stock 957 $0.00 83,472.0000 73,543,862 1.16% 0.00%
March 1, 2024 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks A Common Stock 17800 $0.00 82,515.0000 73,543,862 27.51% 0.02%
March 1, 2023 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks S Common Stock 389 $45.65 75,314.0000 69,914,225 0.51% 0.00%
March 1, 2023 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks D Common Stock 10599 $45.65 64,715.0000 69,914,225 14.07% 0.02%
March 1, 2023 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks A Stock Option (Right to Buy) 39400 $0.00 39,400.0000 69,914,225 9999.99% 0.06%
March 1, 2023 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks A Common Stock 2663 $0.00 53,703.0000 69,914,225 5.22% 0.00%
March 1, 2023 Ultragenyx Pharmaceutical Inc. $RARE Huang Dennis Karl See Remarks A Common Stock 22000 $0.00 75,703.0000 69,914,225 40.97% 0.03%