Theodore Alan Huizenga

Insider

First SEC filing: March 28, 2014 · Latest: Feb. 3, 2021

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.
Initial holdings The stakes this person held when they first started reporting.

Insider at

RARE selling March 2, 2026

Insider transactions

0 buys (P) 4 sells (S) Net: $-44,636 + 67 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

67 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
April 22, 2026	RARE	A	7,348	—	—	7,348 Direct	—	Acquired	(price as of 2026-08-21)
April 22, 2026	RARE	A	20,241	—	—	68,911 Direct	+41.59%	Acquired	(price as of 2026-08-21)
March 2, 2026	RARE	S	1,632	$22.80	$37,210	48,670 Direct	-3.24%	Disposed	14.6% (price as of 2026-08-21)
March 2, 2026	RARE	F	148	$23.39	$3,462	50,302 Direct	-0.29%	Disposed	11.7% (price as of 2026-08-21)
Dec. 29, 2025	RARE	S	85	$34.38	$2,922	50,450 Direct	-0.17%	Disposed	-24.0% (price as of 2026-08-21)
Sept. 18, 2025	RARE	S	64	$29.17	$1,867	50,242 Direct	-0.13%	Disposed	-10.5% (price as of 2026-08-21)
Sept. 5, 2025	RARE	S	84	$31.39	$2,637	50,306 Direct	-0.17%	Disposed	-16.8% (price as of 2026-08-21)
March 3, 2025	RARE	F	141	$42.92	$6,052	50,124 Direct	-0.28%	Disposed	-39.1% (price as of 2026-08-21)
March 3, 2025	RARE	S	967	$42.10	$40,711	50,265 Direct	-1.89%	Disposed	-38.0% (price as of 2026-08-21)
March 1, 2025	RARE	A	5,632	—	—	5,632 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2025	RARE	A	9,392	—	—	51,232 Direct	+22.45%	Acquired	(price as of 2026-08-21)
Dec. 10, 2024	RARE	G	648	—	—	41,840 Direct	-1.53%	Disposed	(price as of 2026-08-21)
Sept. 16, 2024	RARE	A	700	—	—	42,251 Direct	+1.68%	Acquired	(price as of 2026-08-21)
Sept. 3, 2024	RARE	S	91	$56.19	$5,113	41,551 Direct	-0.22%	Disposed	-53.5% (price as of 2026-08-21)
April 16, 2024	RARE	F	14	$42.31	$592	41,366 Direct	-0.03%	Disposed	-38.3% (price as of 2026-08-21)
March 1, 2024	RARE	A	2,351	—	—	2,351 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2024	RARE	A	8,200	—	—	8,200 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2024	RARE	S	341	$53.76	$18,332	41,380 Direct	-0.82%	Disposed	-51.4% (price as of 2026-08-21)
March 1, 2024	RARE	F	121	$53.69	$6,496	41,721 Direct	-0.29%	Disposed	-51.4% (price as of 2026-08-21)
March 1, 2024	RARE	A	13,950	—	—	41,842 Direct	+50.01%	Acquired	(price as of 2026-08-21)
Jan. 2, 2024	RARE	M	3,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Jan. 2, 2024	RARE	M	3,000	$21.00	$63,000	27,892 Direct	+12.05%	Acquired	24.4% (price as of 2026-08-21)
Dec. 20, 2023	RARE	A	1,000	—	—	24,614 Direct	+4.23%	Acquired	(price as of 2026-08-21)
Sept. 27, 2023	RARE	A	2,351	—	—	2,351 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 7, 2023	RARE	M	2,000	—	—	3,000 Direct	-40.00%	Disposed	(price as of 2026-08-21)
Sept. 7, 2023	RARE	S 10b5-1	163	$38.34	$6,249	23,614 Direct	-0.69%	Disposed	-31.9% (price as of 2026-08-21)
Sept. 7, 2023	RARE	S 10b5-1	2,000	$41.00	$82,000	23,777 Direct	-7.76%	Disposed	-36.3% (price as of 2026-08-21)
Sept. 7, 2023	RARE	M	2,000	$21.00	$42,000	25,777 Direct	+8.41%	Acquired	24.4% (price as of 2026-08-21)
Sept. 1, 2023	RARE	S 10b5-1	87	$38.23	$3,326	23,777 Direct	-0.36%	Disposed	-31.7% (price as of 2026-08-21)
Sept. 1, 2023	RARE	S 10b5-1	883	$37.04	$32,706	23,864 Direct	-3.57%	Disposed	-29.5% (price as of 2026-08-21)
May 9, 2023	RARE	M	3,000	—	—	5,000 Direct	-37.50%	Disposed	(price as of 2026-08-21)
May 9, 2023	RARE	M	3,000	$21.00	$63,000	30,747 Direct	+10.81%	Acquired	24.4% (price as of 2026-08-21)
April 16, 2023	RARE	D	181	$38.20	$6,914	27,520 Direct	-0.65%	Disposed	-31.6% (price as of 2026-08-21)
April 16, 2023	RARE	F	14	$38.20	$535	27,701 Direct	-0.05%	Disposed	-31.6% (price as of 2026-08-21)
March 1, 2023	RARE	A	10,120	—	—	10,120 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2023	RARE	D	1,333	$45.65	$60,851	21,715 Direct	-5.78%	Disposed	-42.8% (price as of 2026-08-21)
March 1, 2023	RARE	S	100	$45.65	$4,565	23,048 Direct	-0.43%	Disposed	-42.8% (price as of 2026-08-21)
March 1, 2023	RARE	A	7,590	—	—	23,148 Direct	+48.79%	Acquired	(price as of 2026-08-21)
Feb. 28, 2023	RARE	S 10b5-1	639	$43.40	$27,733	15,558 Direct	-3.95%	Disposed	-39.8% (price as of 2026-08-21)
Dec. 21, 2022	RARE	S 10b5-1	2,031	$43.96	$89,283	16,197 Direct	-11.14%	Disposed	-40.6% (price as of 2026-08-21)
Sept. 1, 2022	RARE	A	1,000	—	—	18,094 Direct	+5.85%	Acquired	(price as of 2026-08-21)
April 16, 2022	RARE	S	132	$84.55	$11,161	16,914 Direct	-0.77%	Disposed	-69.1% (price as of 2026-08-21)
March 1, 2022	RARE	A	7,400	—	—	7,400 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2022	RARE	A	3,710	—	—	17,046 Direct	+27.82%	Acquired	(price as of 2026-08-21)
March 1, 2022	RARE	S	843	$66.62	$56,161	13,229 Direct	-5.99%	Disposed	-60.8% (price as of 2026-08-21)
Oct. 14, 2021	RARE	S	140	$81.14	$11,360	14,072 Direct	-0.99%	Disposed	-67.8% (price as of 2026-08-21)
Sept. 13, 2021	RARE	G	819	—	—	14,212 Direct	-5.45%	Disposed	(price as of 2026-08-21)
May 6, 2021	RARE	S	142	$113.67	$16,141	15,031 Direct	-0.94%	Disposed	-77.0% (price as of 2026-08-21)
April 16, 2021	RARE	A	1,500	—	—	15,044 Direct	+11.08%	Acquired	(price as of 2026-08-21)
March 8, 2021	RARE	S	3,000	$120.69	$362,070	13,544 Direct	-18.13%	Disposed	-78.4% (price as of 2026-08-21)
March 1, 2021	RARE	A	4,655	—	—	4,655 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2021	RARE	S	732	$138.17	$101,140	16,544 Direct	-4.24%	Disposed	-81.1% (price as of 2026-08-21)
March 1, 2021	RARE	A	1,560	—	—	17,276 Direct	+9.93%	Acquired	(price as of 2026-08-21)
Jan. 7, 2021	RARE	M	4,000	—	—	8,000 Direct	-33.33%	Disposed	(price as of 2026-08-21)
Jan. 7, 2021	RARE	S 10b5-1	4,000	$140.65	$562,600	15,716 Direct	-20.29%	Disposed	-81.4% (price as of 2026-08-21)
Jan. 7, 2021	RARE	M 10b5-1	4,000	$21.00	$84,000	20,436 Direct	+24.34%	Acquired	24.4% (price as of 2026-08-21)
Oct. 14, 2020	RARE	S	146	$87.98	$12,845	16,436 Direct	-0.88%	Disposed	-70.3% (price as of 2026-08-21)
July 8, 2020	RARE	M	2,000	—	—	12,000 Direct	-14.29%	Disposed	(price as of 2026-08-21)
July 8, 2020	RARE	S 10b5-1	2,000	$91.00	$182,000	16,582 Direct	-10.76%	Disposed	-71.3% (price as of 2026-08-21)
July 8, 2020	RARE	M	2,000	$21.00	$42,000	18,582 Direct	+12.06%	Acquired	24.4% (price as of 2026-08-21)
July 8, 2020	RARE	S 10b5-1	638	$91.00	$58,058	16,582 Direct	-3.70%	Disposed	-71.3% (price as of 2026-08-21)
July 1, 2020	RARE	M	1,500	—	—	14,000 Direct	-9.68%	Disposed	(price as of 2026-08-21)
July 1, 2020	RARE	S 10b5-1	1,500	$81.00	$121,500	17,220 Direct	-8.01%	Disposed	-67.8% (price as of 2026-08-21)
July 1, 2020	RARE	M	1,500	$21.00	$31,500	18,720 Direct	+8.71%	Acquired	24.4% (price as of 2026-08-21)
July 1, 2020	RARE	S 10b5-1	1,111	$81.00	$89,991	17,220 Direct	-6.06%	Disposed	-67.8% (price as of 2026-08-21)
May 26, 2020	RARE	S 10b5-1	260	$74.93	$19,482	18,331 Direct	-1.40%	Disposed	-65.1% (price as of 2026-08-21)
May 25, 2020	RARE	F	433	$73.81	$31,960	18,591 Direct	-2.28%	Disposed	-64.6% (price as of 2026-08-21)
May 15, 2020	RARE	M	1,500	—	—	15,500 Direct	-8.82%	Disposed	(price as of 2026-08-21)
May 15, 2020	RARE	S 10b5-1	1,500	$71.00	$106,500	19,024 Direct	-7.31%	Disposed	-63.2% (price as of 2026-08-21)
May 15, 2020	RARE	M	1,500	$21.00	$31,500	20,219 Direct	+8.01%	Acquired	24.4% (price as of 2026-08-21)
May 15, 2020	RARE	S 10b5-1	961	$71.00	$68,231	18,719 Direct	-4.88%	Disposed	-63.2% (price as of 2026-08-21)
May 6, 2020	RARE	F	138	$66.26	$9,144	19,680 Direct	-0.70%	Disposed	-60.6% (price as of 2026-08-21)
April 19, 2020	RARE	F	140	$58.57	$8,200	19,818 Direct	-0.70%	Disposed	-55.4% (price as of 2026-08-21)
March 1, 2020	RARE	A	13,280	—	—	13,280 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2020	RARE	A	4,400	—	—	19,958 Direct	+28.28%	Acquired	(price as of 2026-08-21)
March 1, 2020	RARE	A	7,480	—	—	7,480 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2020	RARE	F	388	$56.08	$21,759	17,058 Direct	-2.22%	Disposed	-53.4% (price as of 2026-08-21)
March 1, 2020	RARE	A	1,500	—	—	17,446 Direct	+9.41%	Acquired	(price as of 2026-08-21)
Jan. 14, 2020	RARE	S 10b5-1	1,000	$61.00	$61,000	15,946 Direct	-5.90%	Disposed	-57.2% (price as of 2026-08-21)
Oct. 14, 2019	RARE	A	800	—	—	16,785 Direct	+5.00%	Acquired	(price as of 2026-08-21)
May 25, 2019	RARE	F	433	$57.18	$24,759	15,985 Direct	-2.64%	Disposed	-54.3% (price as of 2026-08-21)
May 21, 2019	RARE	F	156	$59.50	$9,282	16,418 Direct	-0.94%	Disposed	-56.1% (price as of 2026-08-21)
May 6, 2019	RARE	A	800	—	—	16,574 Direct	+5.07%	Acquired	(price as of 2026-08-21)
April 19, 2019	RARE	F	138	$64.43	$8,891	15,504 Direct	-0.88%	Disposed	-59.5% (price as of 2026-08-21)
March 5, 2019	RARE	S	254	$65.52	$16,642	15,642 Direct	-1.60%	Disposed	-60.1% (price as of 2026-08-21)
March 1, 2019	RARE	A	6,840	—	—	6,840 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2019	RARE	A	1,390	—	—	15,896 Direct	+9.58%	Acquired	(price as of 2026-08-21)
March 1, 2019	RARE	A	6,840	—	—	6,840 Direct	—	Acquired	(price as of 2026-08-21)
March 1, 2019	RARE	F	246	$67.55	$16,617	15,649 Direct	-1.55%	Disposed	-61.3% (price as of 2026-08-21)
March 1, 2019	RARE	A	1,390	—	—	15,895 Direct	+9.58%	Acquired	(price as of 2026-08-21)
Jan. 2, 2019	RARE	M	2,448	—	—	17,000 Direct	-12.59%	Disposed	(price as of 2026-08-21)
Jan. 2, 2019	RARE	M	2,448	$21.00	$51,408	14,505 Direct	+20.30%	Acquired	24.4% (price as of 2026-08-21)
June 15, 2018	RARE	M	2,955	—	—	19,448 Direct	-13.19%	Disposed	(price as of 2026-08-21)
June 15, 2018	RARE	S	955	$83.70	$79,934	11,940 Direct	-7.41%	Disposed	-68.8% (price as of 2026-08-21)
June 15, 2018	RARE	M	2,955	$21.00	$62,055	12,895 Direct	+29.73%	Acquired	24.4% (price as of 2026-08-21)
June 13, 2018	RARE	S	1,338	$76.97	$102,986	9,940 Direct	-11.86%	Disposed	-66.1% (price as of 2026-08-21)
May 25, 2018	RARE	F	433	$67.31	$29,145	11,278 Direct	-3.70%	Disposed	-61.2% (price as of 2026-08-21)
May 21, 2018	RARE	F	156	$64.79	$10,107	11,711 Direct	-1.31%	Disposed	-59.7% (price as of 2026-08-21)
April 19, 2018	RARE	A	799	—	—	11,474 Direct	+7.48%	Acquired	(price as of 2026-08-21)
March 1, 2018	RARE	A	7,975	—	—	7,975 Direct	—	Acquired	(price as of 2026-08-21)

Showing latest 100 of 111 transactions

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 22, 2026	RARE	Stock Option (Right to Buy)	Common Stock (7,348)	$24.61	April 22, 2036	7,348	Acquired
March 1, 2025	RARE	Stock Option (Right to Buy)	Common Stock (5,632)	$42.92	March 1, 2035	5,632	Acquired
March 1, 2024	RARE	Stock Option (Right to Buy)	Common Stock (2,351)	$67.37	March 1, 2027	2,351	Acquired
March 1, 2024	RARE	Stock Option (Right to Buy)	Common Stock (8,200)	$53.69	March 1, 2034	8,200	Acquired
Jan. 2, 2024	RARE	Stock Option (Right to Buy)	Common Stock (3,000)	$21.00	Jan. 29, 2024	3,000	Disposed
Sept. 27, 2023	RARE	Stock Option (Right to Buy)	Common Stock (2,351)	$67.37	March 1, 2027	2,351	Acquired
Sept. 7, 2023	RARE	Stock Option (Right to Buy)	Common Stock (2,000)	$21.00	Jan. 29, 2024	2,000	Disposed
May 9, 2023	RARE	Stock Option (Right to Buy)	Common Stock (3,000)	$21.00	Jan. 29, 2024	3,000	Disposed
March 1, 2023	RARE	Stock Option (Right to Buy)	Common Stock (10,120)	$45.65	March 1, 2033	10,120	Acquired
March 1, 2022	RARE	Stock Option (Right to Buy)	Common Stock (7,400)	$67.37	March 1, 2032	7,400	Acquired
March 1, 2021	RARE	Stock Option (Right to Buy)	Common Stock (4,655)	$142.47	March 1, 2031	4,655	Acquired
Jan. 7, 2021	RARE	Stock Option	Common Stock (4,000)	$21.00	Jan. 29, 2024	4,000	Disposed
July 8, 2020	RARE	Stock Option (Right to Buy)	Common Stock (2,000)	$21.00	Jan. 29, 2024	2,000	Disposed
July 1, 2020	RARE	Stock Option (Right to Buy)	Common Stock (1,500)	$21.00	Jan. 29, 2024	1,500	Disposed
May 15, 2020	RARE	Stock Option (Right to Buy)	Common Stock (1,500)	$21.00	Jan. 29, 2024	1,500	Disposed
March 1, 2020	RARE	Stock Option (Right to Buy)	Common Stock (13,280)	$56.08	March 1, 2030	13,280	Acquired
March 1, 2020	RARE	Stock Option (Right to Buy)	Common Stock (7,480)	$56.08	March 1, 2030	7,480	Acquired
March 1, 2019	RARE	Stock Option (Right to Buy)	Common Stock (6,840)	$67.55	March 1, 2029	6,840	Acquired
March 1, 2019	RARE	Stock Option (Right to Buy)	Common Stock (6,840)	$67.55	March 1, 2029	6,840	Acquired
Jan. 2, 2019	RARE	Stock Option (Right to Buy)	Common Stock (2,448)	$21.00	Jan. 29, 2024	2,448	Disposed
June 15, 2018	RARE	Stock Option (Right to Buy)	Common Stock (2,955)	$21.00	Jan. 29, 2024	2,955	Disposed
March 1, 2018	RARE	Stock Option (Right to Buy)	Common Stock (7,975)	$48.43	March 1, 2028	7,975	Acquired
March 1, 2017	RARE	Employee Stock Option (Right to Buy)	Common Stock (6,450)	$88.80	March 1, 2027	6,450	Acquired
May 21, 2015	RARE	Stock Option (Right to Buy)	Common Stock (10,700)	$84.89	May 20, 2025	10,700	Acquired
March 3, 2015	RARE	Stock Option (Right to Buy)	Common Stock (2,500)	$21.00	Jan. 29, 2024	2,500	Disposed

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

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
March 28, 2014	RARE	Stock Option (Right to Buy)→ Common Stock (31,903)	31,903	Direct