Athena Countouriotis

Insider

First SEC filing: June 4, 2026 · Latest: June 4, 2026

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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

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 39 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

39 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 16, 2026	IOVA	A	90,316	—	—	90,316 Direct	—	Acquired	(price as of 2026-08-20)
June 2, 2026	BMRN	A	7,490	—	—	21,040	—	—	(price as of 2026-08-20)
June 13, 2025	IOVA	A	67,546	—	—	67,546 Direct	—	Acquired	(price as of 2026-08-20)
May 20, 2025	BMRN	A	6,650	—	—	13,550 Direct	+96.38%	Acquired	(price as of 2026-08-20)
June 11, 2024	IOVA	A	49,303	—	—	49,303 Direct	—	Acquired	(price as of 2026-08-20)
May 21, 2024	BMRN	A	4,720	—	—	6,900 Direct	+216.51%	Acquired	(price as of 2026-08-20)
March 1, 2024	IOVA	A	50,000	—	—	50,000 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 27, 2023	BMRN	A	2,180	—	—	2,180 Direct	—	Acquired	(price as of 2026-08-20)
June 6, 2023	IOVA	A	51,955	—	—	51,955 Direct	—	Acquired	(price as of 2026-08-20)
May 25, 2023	PASG	A	24,000	—	—	24,000 Direct	—	Acquired	(price as of 2026-08-20)
June 10, 2022	IOVA	A	51,204	—	—	51,204 Direct	—	Acquired	(price as of 2026-08-20)
May 26, 2022	PASG	A	24,000	—	—	24,000 Direct	—	Acquired	(price as of 2026-08-20)
June 29, 2021	IOVA	A	35,000	—	—	35,000 Direct	—	Acquired	(price as of 2026-08-20)
May 27, 2021	PASG	A	16,918	—	—	16,918 Direct	—	Acquired	(price as of 2026-08-20)
June 8, 2020	IOVA	A	35,000	—	—	35,000 Direct	—	Acquired	(price as of 2026-08-20)
March 24, 2020	PASG	P	10,000	$14.98	$149,800	18,900 Direct	+112.36%	Acquired	-98.5% (price as of 2026-08-20)
March 3, 2020	PASG	P	8,900	$18.00	$160,200	8,900 Direct	—	Acquired	-98.7% (price as of 2026-08-20)
Feb. 27, 2020	PASG	A	33,836	—	—	33,836 Direct	—	Acquired	(price as of 2026-08-20)
June 20, 2019	CRDF	A	44,734	—	—	46,019 Direct	+3481.25%	Acquired	(price as of 2026-08-20)
June 10, 2019	IOVA	A	35,000	—	—	35,000 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 23, 2018	CRDF	A	54,322	—	—	92,428 Direct	+142.55%	Acquired	(price as of 2026-08-20)
Feb. 22, 2017	HALO	A	45,568	—	—	45,568 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 22, 2017	HALO	A	72,925	—	—	72,925 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 3, 2017	HALO	M	18,496	—	—	55,487 Direct	-25.00%	Disposed	(price as of 2026-08-20)
Feb. 3, 2017	HALO	F	6,900	$12.26	$84,594	39,077 Direct	-15.01%	Disposed	767.0% (price as of 2026-08-20)
Feb. 3, 2017	HALO	M	18,496	—	—	45,977 Direct	+67.30%	Acquired	(price as of 2026-08-20)
Jan. 5, 2017	HALO	M	7,500	—	—	15,000 Direct	-33.33%	Disposed	(price as of 2026-08-20)
Jan. 5, 2017	HALO	M	7,500	—	—	27,481 Direct	+37.54%	Acquired	(price as of 2026-08-20)
June 30, 2016	HALO	M	6,450	—	—	20,088 Direct	+47.29%	Acquired	(price as of 2026-08-20)
June 30, 2016	HALO	F	107	$8.63	$923	19,981 Direct	-0.53%	Disposed	1131.7% (price as of 2026-08-20)
June 30, 2016	HALO	A	6,450	—	—	6,450 Direct	—	Acquired	(price as of 2026-08-20)
June 30, 2016	HALO	M	6,450	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 3, 2016	HALO	A	73,983	—	—	73,983 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 3, 2016	HALO	A	125,523	—	—	125,523 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 5, 2016	HALO	M	7,500	—	—	22,500 Direct	-25.00%	Disposed	(price as of 2026-08-20)
Jan. 5, 2016	HALO	F	3,257	$16.39	$53,382	13,638 Direct	-19.28%	Disposed	548.6% (price as of 2026-08-20)
Jan. 5, 2016	HALO	M	7,500	—	—	16,895 Direct	+79.83%	Acquired	(price as of 2026-08-20)
Dec. 31, 2015	HALO	F	5,655	$17.33	$98,001	9,395 Direct	-37.57%	Disposed	513.4% (price as of 2026-08-20)
Dec. 31, 2015	HALO	A	15,050	—	—	15,050 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 5, 2015	HALO	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 5, 2015	HALO	A	250,000	—	—	250,000 Direct	—	Acquired	(price as of 2026-08-20)

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
June 16, 2026	IOVA	Deferred Restricted Stock Unit	Common Stock (90,316)	—	—	90,316	Acquired
June 13, 2025	IOVA	Deferred Restricted Stock Unit	Common Stock (67,546)	—	—	67,546	Acquired
June 11, 2024	IOVA	Deferred Restricted Stock Unit	Common Stock (49,303)	—	—	49,303	Acquired
March 1, 2024	IOVA	Deferred Restricted Stock Unit	Common Stock (50,000)	—	—	50,000	Acquired
June 6, 2023	IOVA	Deferred Restricted Stock Unit	Common Stock (51,955)	—	—	51,955	Acquired
May 25, 2023	PASG	Director Stock Option (Right to Buy)	Common Stock (24,000)	$1.00	May 24, 2033	24,000	Acquired
June 10, 2022	IOVA	Deferred Restricted Stock Unit	Common Stock (51,204)	—	—	51,204	Acquired
May 26, 2022	PASG	Director Stock Option (Right to Buy)	Common Stock (24,000)	$1.76	May 25, 2032	24,000	Acquired
June 29, 2021	IOVA	Stock Option (right to buy)	Common Stock (35,000)	$26.33	June 29, 2031	35,000	Acquired
May 27, 2021	PASG	Director Stock Option (Right to Buy)	Common Stock (16,918)	$13.83	May 26, 2031	16,918	Acquired
June 8, 2020	IOVA	Stock Option (right to buy)	Common Stock (35,000)	$32.17	June 7, 2030	35,000	Acquired
Feb. 27, 2020	PASG	Director Stock Option (Right to Buy)	Common Stock (33,836)	$18.00	Feb. 27, 2030	33,836	Acquired
June 20, 2019	CRDF	Stock Options	Common Stock (44,734)	$2.48	June 20, 2029	44,734	Acquired
June 10, 2019	IOVA	Stock Option (right to buy)	Common Stock (35,000)	$19.93	June 9, 2029	35,000	Acquired
Jan. 23, 2018	CRDF	Stock Options	Common Stock (54,322)	$0.30	Jan. 23, 2028	54,322	Acquired
Feb. 22, 2017	HALO	Restricted Stock Units	Common Stock (45,568)	$0.00	—	45,568	Acquired
Feb. 22, 2017	HALO	Option to Purchase Common Stock	Common Stock (72,925)	$12.07	Feb. 22, 2027	72,925	Acquired
Feb. 3, 2017	HALO	Restricted Stock Units	Common Stock (18,496)	$0.00	—	18,496	Disposed
Jan. 5, 2017	HALO	Restricted Stock Units	Common Stock (7,500)	$0.00	—	7,500	Disposed
June 30, 2016	HALO	Performance Stock Units	Common Stock (6,450)	$0.00	—	6,450	Acquired
June 30, 2016	HALO	Performance Stock Units	Common Stock (6,450)	$0.00	—	6,450	Disposed
Feb. 3, 2016	HALO	Restricted Stock Units	Common Stock (73,983)	$0.00	Feb. 3, 2026	73,983	Acquired
Feb. 3, 2016	HALO	Option to Purchase Common Stock	Common Stock (125,523)	$8.11	Feb. 3, 2026	125,523	Acquired
Jan. 5, 2016	HALO	Restricted Stock Units	Common Stock (7,500)	$0.00	—	7,500	Disposed
Jan. 5, 2015	HALO	Restricted Stock Units	Common Stock (30,000)	$0.00	Jan. 5, 2025	30,000	Acquired
Jan. 5, 2015	HALO	Option to Purchase Common Stock	Common Stock (250,000)	$9.99	Jan. 5, 2025	250,000	Acquired

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

Initial ownership (Form 3) 2 holdings

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

Date	Ticker	Security	Shares	Ownership
Sept. 20, 2017	CRDF	Stock Options→ Common Stock (38,106)	38,106	Direct
Jan. 5, 2015	HALO	Common Stock	0	Direct