Dennis Karl Huang

Insider

First SEC filing: July 20, 2015 · Latest: July 20, 2015

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Compensation Executive pay disclosed in company proxy statements.

Insider at

RARE selling March 1, 2023

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 51 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

51 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
April 16, 2026	RARE	A	79,936	—	—	79,936 Direct	—	Acquired	(price as of 2026-08-21)
April 16, 2026	RARE	A	23,116	—	—	147,845 Direct	+18.53%	Acquired	(price as of 2026-08-21)
March 2, 2026	RARE	F	999	$23.39	$23,367	124,729 Direct	-0.79%	Disposed	11.7% (price as of 2026-08-21)
March 1, 2026	RARE	A	11,137	—	—	125,728 Direct	+9.72%	Acquired	(price as of 2026-08-21)
March 3, 2025	RARE	F	1,348	$42.92	$57,856	114,591 Direct	-1.16%	Disposed	-39.1% (price as of 2026-08-21)
March 1, 2025	RARE	A	26,074	—	—	26,074 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2025	RARE	A	18,443	—	—	115,939 Direct	+18.92%	Acquired	(price as of 2026-08-21)
March 1, 2025	RARE	A	14,494	—	—	97,496 Direct	+17.46%	Acquired	(price as of 2026-08-21)
March 1, 2024	RARE	A	31,400	—	—	31,400 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2024	RARE	F	470	$53.69	$25,234	83,002 Direct	-0.56%	Disposed	-51.4% (price as of 2026-08-21)
March 1, 2024	RARE	A	957	—	—	83,472 Direct	+1.16%	Acquired	(price as of 2026-08-21)
March 1, 2024	RARE	A	17,800	—	—	82,515 Direct	+27.51%	Acquired	(price as of 2026-08-21)
March 1, 2023	RARE	A	39,400	—	—	39,400 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2023	RARE	D	10,599	$45.65	$483,844	64,715 Direct	-14.07%	Disposed	-42.8% (price as of 2026-08-21)
March 1, 2023	RARE	S	389	$45.65	$17,758	75,314 Direct	-0.51%	Disposed	-42.8% (price as of 2026-08-21)
March 1, 2023	RARE	A	22,000	—	—	75,703 Direct	+40.97%	Acquired	(price as of 2026-08-21)
March 1, 2023	RARE	A	2,663	—	—	53,703 Direct	+5.22%	Acquired	(price as of 2026-08-21)
March 1, 2022	RARE	A	24,900	—	—	24,900 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2022	RARE	A	14,000	—	—	51,040 Direct	+37.80%	Acquired	(price as of 2026-08-21)
March 1, 2022	RARE	S	3,234	$66.62	$215,449	36,914 Direct	-8.06%	Disposed	-60.8% (price as of 2026-08-21)
Oct. 14, 2021	RARE	S	358	$81.14	$29,048	40,148 Direct	-0.88%	Disposed	-67.8% (price as of 2026-08-21)
May 6, 2021	RARE	S	363	$113.68	$41,266	40,506 Direct	-0.89%	Disposed	-77.0% (price as of 2026-08-21)
March 1, 2021	RARE	A	5,500	—	—	40,199 Direct	+15.85%	Acquired	(price as of 2026-08-21)
March 1, 2021	RARE	A	4,636	—	—	44,835 Direct	+11.53%	Acquired	(price as of 2026-08-21)
March 1, 2021	RARE	S	4,255	$138.18	$587,956	40,761 Direct	-9.45%	Disposed	-81.1% (price as of 2026-08-21)
March 1, 2021	RARE	A	11,000	—	—	11,000 Direct	—	Acquired	(price as of 2026-08-21)
Oct. 14, 2020	RARE	S	262	$88.00	$23,056	34,699 Direct	-0.75%	Disposed	-70.3% (price as of 2026-08-21)
June 1, 2020	RARE	F	262	$69.38	$18,178	34,961 Direct	-0.74%	Disposed	-62.4% (price as of 2026-08-21)
May 6, 2020	RARE	F	248	$66.26	$16,432	34,979 Direct	-0.70%	Disposed	-60.6% (price as of 2026-08-21)
April 19, 2020	RARE	F	248	$58.57	$14,525	35,227 Direct	-0.70%	Disposed	-55.4% (price as of 2026-08-21)
March 1, 2020	RARE	A	22,000	—	—	22,000 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2020	RARE	F	1,779	$56.08	$99,766	35,475 Direct	-4.78%	Disposed	-53.4% (price as of 2026-08-21)
March 1, 2020	RARE	A	5,634	—	—	37,013 Direct	+17.95%	Acquired	(price as of 2026-08-21)
March 1, 2020	RARE	A	7,800	—	—	31,379 Direct	+33.08%	Acquired	(price as of 2026-08-21)
Oct. 14, 2019	RARE	A	1,434	—	—	23,579 Direct	+6.48%	Acquired	(price as of 2026-08-21)
June 1, 2019	RARE	F	260	$54.93	$14,282	22,145 Direct	-1.16%	Disposed	-52.4% (price as of 2026-08-21)
May 6, 2019	RARE	A	1,434	—	—	22,405 Direct	+6.84%	Acquired	(price as of 2026-08-21)
May 5, 2019	RARE	F	649	$67.99	$44,126	20,971 Direct	-3.00%	Disposed	-61.6% (price as of 2026-08-21)
April 19, 2019	RARE	F	248	$64.43	$15,979	21,445 Direct	-1.14%	Disposed	-59.5% (price as of 2026-08-21)
March 5, 2019	RARE	S	626	$65.52	$41,016	21,693 Direct	-2.80%	Disposed	-60.1% (price as of 2026-08-21)
March 1, 2019	RARE	A	20,000	—	—	20,000 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2019	RARE	A	6,000	—	—	22,319 Direct	+36.77%	Acquired	(price as of 2026-08-21)
March 1, 2019	RARE	A	20,000	—	—	20,000 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2019	RARE	F	607	$67.55	$41,003	21,711 Direct	-2.72%	Disposed	-61.3% (price as of 2026-08-21)
March 1, 2019	RARE	A	6,000	—	—	22,318 Direct	+36.77%	Acquired	(price as of 2026-08-21)
June 1, 2018	RARE	F	260	$73.73	$19,170	16,124 Direct	-1.59%	Disposed	-64.6% (price as of 2026-08-21)
May 5, 2018	RARE	F	649	$54.50	$35,370	16,384 Direct	-3.81%	Disposed	-52.1% (price as of 2026-08-21)
April 19, 2018	RARE	A	1,431	—	—	16,850 Direct	+9.28%	Acquired	(price as of 2026-08-21)
March 1, 2018	RARE	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2018	RARE	F	205	$48.43	$9,928	15,419 Direct	-1.31%	Disposed	-46.1% (price as of 2026-08-21)
March 1, 2018	RARE	A	4,500	—	—	15,624 Direct	+40.45%	Acquired	(price as of 2026-08-21)
June 1, 2017	RARE	F	282	$56.61	$15,964	10,939 Direct	-2.51%	Disposed	-53.9% (price as of 2026-08-21)
May 5, 2017	RARE	F	705	$61.08	$43,061	11,221 Direct	-5.91%	Disposed	-57.2% (price as of 2026-08-21)
March 1, 2017	RARE	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2017	RARE	A	2,000	—	—	11,795 Direct	+20.42%	Acquired	(price as of 2026-08-21)
July 16, 2015	RARE	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-21)
May 5, 2015	RARE	A	60,000	—	—	60,000 Direct	—	Acquired	(price as of 2026-08-21)
May 5, 2015	RARE	A	7,500	—	—	7,500 Direct	—	Acquired	(price as of 2026-08-21)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
April 16, 2026	RARE	Stock Option (Right to Buy)	Common Stock (79,936)	$24.52	April 16, 2036	79,936	Acquired
March 1, 2025	RARE	Stock Option (Right to Buy)	Common Stock (26,074)	$42.92	March 1, 2035	26,074	Acquired
March 1, 2024	RARE	Stock Option (Right to Buy)	Common Stock (31,400)	$53.69	March 1, 2034	31,400	Acquired
March 1, 2023	RARE	Stock Option (Right to Buy)	Common Stock (39,400)	$45.65	March 1, 2033	39,400	Acquired
March 1, 2022	RARE	Stock Option (Right to Buy)	Common Stock (24,900)	$67.37	March 1, 2032	24,900	Acquired
March 1, 2021	RARE	Stock Option (Right to Buy)	Common Stock (11,000)	$142.47	March 1, 2031	11,000	Acquired
March 1, 2020	RARE	Stock Option (Right to Buy)	Common Stock (22,000)	$56.08	March 1, 2030	22,000	Acquired
March 1, 2019	RARE	Stock Option (Right to Buy)	Common Stock (20,000)	$67.55	March 1, 2029	20,000	Acquired
March 1, 2019	RARE	Stock Option (Right to Buy)	Common Stock (20,000)	$67.55	March 1, 2029	20,000	Acquired
March 1, 2018	RARE	Stock Option (Right to Buy)	Common Stock (25,000)	$48.43	March 1, 2028	25,000	Acquired
March 1, 2017	RARE	Employee Stock Option (RIght to Buy)	Common Stock (15,000)	$88.80	March 1, 2027	15,000	Acquired
July 16, 2015	RARE	Stock Option (Right to Buy)	Common Stock (15,000)	$124.87	July 15, 2025	15,000	Acquired
May 5, 2015	RARE	Stock Option (Right to Buy)	Common Stock (60,000)	$62.63	May 4, 2025	60,000	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

RARE

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2015	$215,135	—	—	—	$95,805	—	$20,390	$4,242,541

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.