JANE STREET GROUP, LLC

Position in PRTA — Prothena Corp Public Ltd Co

CIK 1595888 NEW YORK, NY

Back to PRTA Full portfolio

Position in PRTA

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

-$1,049,039 QoQ

Shares Held

-100.0% QoQ

Ownership

0.000%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2020

22 quarters on record

Common Shares in PRTA Over Time

Shares Held

Position Value (USD)

Derivatives in PRTA

reported options exposure · as of Jun 30, 2026

CallValue

$1,014,244

CallShares

103,600

PutValue

$465,025

PutShares

47,500

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Biotechnology

Healthcare · as of Jun 30, 2026

JANE STREET GROUP, LLC holds $1,363,862,981 across 291 Biotechnology names.

#	Ticker	Company	Shares	Value (USD)
1	BBIO	BridgeBio Pharma, Inc.	2,934,193	$218,538,693
2	MDGL	Madrigal Pharmaceuticals, Inc.	191,541	$102,847,939
3	AXSM	Axsome Therapeutics, Inc.	403,995	$98,885,855
4	TGTX	Tg Therapeutics, Inc.	1,752,646	$96,290,370
5	EXEL	Exelixis, Inc.	1,402,438	$76,306,651
6	QURE	uniQure N.V.	1,610,483	$74,178,846
7	HALO	Halozyme Therapeutics, Inc.	694,684	$54,372,915
8	TVTX	Travere Therapeutics, Inc.	938,699	$53,327,489

All Filings in PRTA

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40 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$465,025	47,500	+8.0%	Put	Defined	2026-08-14
2026-06-30	$1,014,244	103,600	+5.2%	Call	Defined	2026-08-14
2026-03-31	$1,049,039	107,926	-74.8%	Shares	Defined	2026-05-12
2026-03-31	$957,420	98,500	-27.0%	Call	Defined	2026-05-12
2026-03-31	$427,680	44,000	-67.7%	Put	Defined	2026-05-12
2025-12-31	$1,299,755	136,100	-23.9%	Put	Defined	2026-02-12
2025-12-31	$4,093,615	428,651	-30.8%	Shares	Defined	2026-02-12
2025-12-31	$1,289,250	135,000	+67.7%	Call	Defined	2026-02-12
2025-09-30	$1,746,064	178,900	+25.1%	Put	Defined	2025-11-14
2025-09-30	$6,049,169	619,792	+427.7%	Shares	Defined	2025-11-14
2025-09-30	$785,680	80,500	+43.2%	Call	Defined	2025-11-14
2025-06-30	$341,134	56,200	+298.6%	Call	Defined	2025-08-14
2025-06-30	$868,010	143,000	+907.0%	Put	Defined	2025-08-14
2025-06-30	$712,939	117,453	-11.4%	Shares	Defined	2025-08-14
2025-03-31	$1,641,419	132,640	+138.9%	Shares	Defined	2025-05-19
2025-03-31	$174,487	14,100	-50.9%	Call	Defined	2025-05-19
2024-12-31	$769,061	55,528	-41.8%	Shares	Defined	2025-02-14
2024-12-31	$397,495	28,700	+149.6%	Call	Defined	2025-02-14
2024-09-30	$192,395	11,500	-83.8%	Call	Defined	2024-11-15
2024-09-30	$1,596,776	95,444	-21.4%	Shares	Defined	2024-11-15
2024-06-30	$2,507,037	121,465	+123.3%	Shares	Defined	2024-08-15
2024-03-31	$1,347,388	54,396	-70.6%	Shares	Defined	2024-05-16
2023-12-31	$6,729,985	185,195	+2860.3%	Shares	Defined	2024-02-15
2023-09-30	$301,852	6,256	-88.3%	Shares	Defined	2023-11-15
2023-06-30	$3,651,273	53,475	+175.7%	Shares	Defined	2023-08-14
2023-03-31	$939,978	19,393	-22.9%	Shares	Defined	2023-05-16
2022-06-30	$683,310	25,168	+174.5%	Shares	Defined	2022-08-16
2022-03-31	$2,592,813	70,900	+140.3%	Call	Defined	2022-05-17
2022-03-31	$519,294	14,200	+121.9%	Put	Defined	2022-05-17
2021-12-31	$1,457,300	29,500	-72.6%	Call	Defined	2022-02-15
2021-12-31	$316,160	6,400	-84.9%	Put	Defined	2022-02-15
2021-12-31	$452,899	9,168	-29.2%	Shares	Defined	2022-02-15
2021-09-30	$3,027,275	42,500	+26.9%	Put	Defined	2021-11-16
2021-09-30	$7,664,348	107,600	+18.2%	Call	Defined	2021-11-16
2021-09-30	$922,357	12,949	-45.1%	Shares	Defined	2021-11-16
2021-06-30	$1,722,235	33,500	—	Put	Defined	2021-08-16
2021-06-30	$4,678,310	91,000	+143.3%	Call	Defined	2021-08-16
2021-03-31	$939,488	37,400	—	Call	Defined	2021-05-18
2020-09-30	$235,684	23,592	-47.5%	Shares	Defined	2020-11-17
2020-06-30	$469,654	44,900	—	Shares	Defined	2020-08-17
No filing history on record for this holder in this stock.