Ultragenyx Pharmaceutical Inc. (RARE) has 20 known insider and institutional holders on record. The largest holder is KAKKIS EMIL D with 712,908 shares. Other notable holders include Kassberg Thomas Richard and Huang Dennis Karl.
Over the last 12 months, insiders have made 37 transactions in RARE stock — 14 buys (valued at $2.63M) and 22 sells (valued at $3.21M). Insider selling has exceeded buying during this period.
RARE Insider Ownership
Top Holder
KAKKIS EMIL D
712,908 shares
Buys (12 mo)
14
$2.63M value
Sells (12 mo)
22
$3.21M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Kakkis Emil D |
President & CEO |
712,908 |
2026-03-03 |
|
| 2 |
Kassberg Thomas Richard |
Cbo & EVP |
271,266 |
2025-03-04 |
|
| 3 |
Huang Dennis Karl |
See Remarks |
125,728 |
2026-03-03 |
|
| 4 |
Pinion John Richard |
See Remarks |
119,565 |
2026-03-03 |
|
| 5 |
Harris Erik |
EVP & Chief Commercial Officer |
99,498 |
2026-03-03 |
|
| 6 |
Sharp Shalini |
EVP, Finance |
97,812 |
2020-10-16 |
|
| 7 |
Crombez Eric |
EVP and Chief Medical Officer |
83,173 |
2026-03-03 |
|
| 8 |
Horn Howard |
Chief Financial Officer |
80,351 |
2026-04-02 |
|
| 9 |
Parschauer Karah Herdman |
EVP and Chief Legal Officer |
70,328 |
2026-03-10 |
|
| 10 |
Dier Mardi |
CFO & Executive Vice President |
66,695 |
2022-10-17 |
|
| 11 |
Huizenga Theodore Alan |
SVP, Chief Accounting Officer |
48,670 |
2026-03-03 |
|
| 12 |
Bedrosian Camille L |
EVP and Chief Medical Officer |
46,720 |
2023-03-03 |
|
| 13 |
Dallas Jayson Donald Alexander |
EVP & Chief Commercial Officer |
23,830 |
2018-06-04 |
|
| 14 |
Hogenhuis Wladimir |
Chief Operating Officer |
18,703 |
2019-10-07 |
|
| 15 |
Sanders Corazon (corsee) D. |
Director |
15,344 |
2025-06-23 |
|
| 16 |
Ray Amrit |
Director |
10,787 |
2025-05-19 |
|
| 17 |
Welch Daniel G |
Director |
10,787 |
2025-05-19 |
|
| 18 |
Fust Matthew K |
Director |
10,787 |
2025-05-19 |
|
| 19 |
Narachi Michael |
Director |
10,787 |
2025-05-19 |
|
| 20 |
Suliman Shehnaaz |
Director |
10,787 |
2025-05-19 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-04-01 |
Horn Howard |
Chief Financial Officer |
Informative Sell |
4,683 |
$20.97 |
$98.2K |
| 2026-03-10 |
Parschauer Karah Herdman |
EVP and Chief Legal Officer |
Informative Sell |
3,508 |
$22.67 |
$79.53K |
| 2026-03-06 |
Parschauer Karah Herdman |
EVP and Chief Legal Officer |
Informative Sell |
6,018 |
$21.40 |
$128.79K |
| 2026-03-03 |
Horn Howard |
Chief Financial Officer |
Informative Sell |
1,635 |
$22.40 |
$36.62K |
| 2026-03-02 |
Horn Howard |
Chief Financial Officer |
Informative Sell |
3,119 |
$22.54 |
$70.3K |
| 2026-03-01 |
Horn Howard |
Chief Financial Officer |
RSU Award |
6,143 |
- |
- |
| 2026-03-02 |
Harris Erik |
EVP & Chief Commercial Officer |
Informative Sell |
10,539 |
$22.80 |
$240.29K |
| 2026-03-01 |
Harris Erik |
EVP & Chief Commercial Officer |
RSU Award |
11,643 |
- |
- |
| 2026-03-02 |
Parschauer Karah Herdman |
EVP and Chief Legal Officer |
Informative Sell |
8,135 |
$22.80 |
$185.48K |
| 2026-03-01 |
Parschauer Karah Herdman |
EVP and Chief Legal Officer |
RSU Award |
11,137 |
- |
- |
| 2026-03-02 |
Crombez Eric |
EVP and Chief Medical Officer |
Informative Sell |
7,029 |
$22.80 |
$160.26K |
| 2026-03-01 |
Crombez Eric |
EVP and Chief Medical Officer |
RSU Award |
11,643 |
- |
- |
| 2026-03-02 |
Pinion John Richard |
See Remarks |
Informative Sell |
10,029 |
$22.80 |
$228.66K |
| 2026-03-01 |
Pinion John Richard |
See Remarks |
RSU Award |
11,137 |
- |
- |
| 2026-03-02 |
Huang Dennis Karl |
See Remarks |
Tax Withholding of RSU |
999 |
$23.39 |
$23.37K |
| 2026-03-01 |
Huang Dennis Karl |
See Remarks |
RSU Award |
11,137 |
- |
- |
| 2026-03-02 |
Huizenga Theodore Alan |
SVP, Chief Accounting Officer |
Informative Sell |
1,632 |
$22.80 |
$37.21K |
| 2026-03-02 |
Kakkis Emil D |
President & CEO |
Informative Sell |
54,404 |
$22.80 |
$1.24M |
| 2026-03-01 |
Kakkis Emil D |
President & CEO |
RSU Award |
71,177 |
- |
- |
| 2026-02-02 |
Horn Howard |
Chief Financial Officer |
Informative Sell |
3,061 |
$23.56 |
$72.12K |
| 2026-01-02 |
Horn Howard |
Chief Financial Officer |
Informative Sell |
3,150 |
$22.84 |
$71.95K |
| 2025-12-29 |
Huizenga Theodore Alan |
SVP, Chief Accounting Officer |
Informative Sell |
85 |
$34.38 |
$2.92K |
| 2025-12-10 |
Horn Howard |
Chief Financial Officer |
Informative Sell |
3,081 |
$36.38 |
$112.09K |
| 2025-10-13 |
Horn Howard |
Chief Financial Officer |
Informative Sell |
7,942 |
$31.51 |
$250.25K |
| 2025-09-18 |
Huizenga Theodore Alan |
SVP, Chief Accounting Officer |
Informative Sell |
64 |
$29.17 |
$1.87K |
