JANE STREET GROUP, LLC

Position in ALEC — Alector, Inc.

CIK 1595888 NEW YORK, NY

Back to ALEC Full portfolio

Position in ALEC

as of Mar 31, 2026 · filed May 12, 2026 Compact

Position Value

$858,847

-$691,656 QoQ

Shares Held

399,464

-59.8% QoQ

Ownership

0.360%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

23 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in ALEC Over Time

Shares Held

Position Value (USD)

Derivatives in ALEC

reported options exposure · as of Mar 31, 2026

CallValue

$68,370

CallShares

31,800

PutValue

PutShares

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 Mar 31, 2026

JANE STREET GROUP, LLC holds $1,248,975,671 across 317 Biotechnology names. ALEC ranks #127 (0.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BBIO	BridgeBio Pharma, Inc.	1,757,672	$130,524,721
2	RPRX	Royalty Pharma plc	2,400,382	$115,146,324
3	TGTX	Tg Therapeutics, Inc.	2,041,669	$67,824,242
4	VRTX	Vertex Pharmaceuticals Inc / Ma	122,946	$54,900,305
5	HALO	Halozyme Therapeutics, Inc.	831,707	$53,753,223
6	EXEL	Exelixis, Inc.	1,087,030	$46,622,715
7	JAZZ	Jazz Pharmaceuticals plc	223,615	$42,274,415
8	BNTX	BioNTech SE	336,757	$29,930,962

All Filings in ALEC

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36 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$68,370	31,800	-92.0%	Call	Defined	2026-05-12
2026-03-31	$858,847	399,464	+3070.3%	Shares	Defined	2026-05-12
2025-12-31	$19,656	12,600	-98.7%	Call	Defined	2026-02-12
2025-12-31	$1,550,503	993,913	+183.8%	Shares	Defined	2026-02-12
2025-09-30	$1,036,682	350,231	+1362.2%	Shares	Defined	2025-11-14
2025-06-30	$33,532	23,952	-90.7%	Shares	Defined	2025-08-14
2025-03-31	$315,557	256,551	+4.7%	Shares	Defined	2025-05-19
2024-12-31	$462,922	244,933	+58.1%	Shares	Defined	2025-02-14
2024-09-30	$722,029	154,942	+24.2%	Shares	Defined	2024-11-15
2024-06-30	$566,418	124,762	+242.0%	Shares	Defined	2024-08-15
2024-03-31	$219,585	36,476	-65.4%	Shares	Defined	2024-05-16
2023-12-31	$841,290	105,425	+69.9%	Shares	Defined	2024-02-15
2023-09-30	$402,168	62,063	-21.5%	Shares	Defined	2023-11-15
2023-06-30	$474,970	79,030	+130.9%	Shares	Defined	2023-08-14
2022-09-30	$323,748	34,223	+132.6%	Shares	Defined	2022-11-15
2022-06-30	$149,484	14,713	-43.7%	Shares	Defined	2022-08-16
2022-03-31	$372,394	26,133	+144.2%	Shares	Defined	2022-05-17
2022-03-31	$152,475	10,700	-53.1%	Call	Defined	2022-05-17
2021-12-31	$470,820	22,800	-30.4%	Call	Defined	2022-02-15
2021-12-31	$676,142	32,743	+11.0%	Shares	Defined	2022-02-15
2021-12-31	$609,175	29,500	+32.3%	Put	Defined	2022-02-15
2021-09-30	$508,886	22,300	-70.7%	Call	Defined	2021-11-16
2021-09-30	$1,736,602	76,100	-12.9%	Put	Defined	2021-11-16
2021-09-30	$1,994,558	87,404	+125.3%	Shares	Defined	2021-11-16
2021-06-30	$808,204	38,800	+95.0%	Put	Defined	2021-08-16
2021-06-30	$414,517	19,900	-63.0%	Call	Defined	2021-08-16
2021-06-30	$1,120,424	53,789	+50.7%	Shares	Defined	2021-08-16
2021-03-31	$718,998	35,700	+6.3%	Put	Defined	2021-05-18
2021-03-31	$676,642	33,597	+131.7%	Shares	Defined	2021-05-18
2021-03-31	$292,030	14,500	-70.7%	Call	Defined	2021-05-18
2020-12-31	$747,950	49,435	+362.0%	Shares	Defined	2021-02-17
2020-12-31	$161,891	10,700	-78.3%	Call	Defined	2021-02-17
2020-12-31	$745,909	49,300	+35.8%	Put	Defined	2021-02-17
2020-09-30	$382,578	36,315	+74.8%	Shares	Defined	2020-11-17
2020-06-30	$507,739	20,775	+96.6%	Shares	Defined	2020-08-17
2020-03-31	$254,933	10,565	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.