Twin Tree Management, LP

Position in BIIB — Biogen Inc.

CIK 1535588 DALLAS, TX

Back to BIIB Full portfolio

Position in BIIB

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$1,189,842

+$1,050,695 QoQ

Shares Held

5,507

+625.6% QoQ

Ownership

0.004%

of shares outstanding

% of Portfolio

0.21%

of 13F equity value

Holder Rank

#426

of 1,036 holders

Holding Since

Mar 2020

24 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in BIIB Over Time

Shares Held

Position Value (USD)

Derivatives in BIIB

reported options exposure · as of Jun 30, 2026

CallValue

$2,419,872

CallShares

11,200

PutValue

$367,302

PutShares

1,700

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 Drug Manufacturers - General

Healthcare · as of Jun 30, 2026

Twin Tree Management, LP holds $3,384,238 across 4 Drug Manufacturers - General names. BIIB ranks #2 (35.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PFE	Pfizer Inc	67,307	$1,620,752
2	BIIB	Biogen Inc. This page	5,507	$1,189,842
3	LLY	ELI LILLY & Co	351	$420,999
4	NVS	Novartis AG	974	$152,645

All Filings in BIIB

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46 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$1,189,842	5,507	+625.6%	Shares	Sole	2026-08-12
2026-06-30	$2,419,872	11,200	0.0%	Call	Sole	2026-08-12
2026-06-30	$367,302	1,700	-94.2%	Put	Sole	2026-08-12
2026-03-31	$2,053,296	11,200	+833.3%	Call	Sole	2026-05-14
2026-03-31	$139,147	759	-93.8%	Shares	Sole	2026-05-14
2026-03-31	$5,389,902	29,400	-60.4%	Put	Sole	2026-05-14
2025-12-31	$13,076,057	74,300	+208.3%	Put	Sole	2026-02-11
2025-12-31	$2,159,397	12,270	+185.6%	Shares	Sole	2026-02-11
2025-09-30	$3,375,928	24,100	+259.7%	Put	Sole	2025-11-13
2025-09-30	$168,096	1,200	-81.8%	Call	Sole	2025-11-13
2025-06-30	$841,453	6,700	-36.2%	Put	Sole	2025-07-28
2025-06-30	$828,894	6,600	-52.9%	Call	Sole	2025-07-28
2025-03-31	$1,915,760	14,000	-47.4%	Call	Sole	2025-05-15
2025-03-31	$1,436,820	10,500	+7.1%	Put	Sole	2025-05-15
2024-12-31	$1,498,616	9,800	-24.6%	Put	Sole	2025-02-10
2024-09-30	$832,736	4,296	+147.3%	Shares	Sole	2024-11-13
2024-09-30	$2,519,920	13,000	+85.7%	Put	Sole	2024-11-13
2024-06-30	$402,671	1,737	-94.1%	Shares	Sole	2024-08-13
2024-03-31	$1,509,410	7,000	-92.6%	Put	Sole	2024-05-09
2023-06-30	$8,417,887	29,552	+50.5%	Shares	Sole	2023-08-11
2023-03-31	$5,460,231	19,639	-59.3%	Shares	Sole	2023-05-10
2022-12-31	$13,346,436	48,196	-57.7%	Shares	Sole	2023-02-13
2022-09-30	$30,387,804	113,812	+17.8%	Shares	Sole	2022-11-10
2022-06-30	$19,701,419	96,604	+63.7%	Shares	Sole	2022-08-11
2022-03-31	$12,424,768	58,997	+361.7%	Shares	Sole	2022-05-11
2022-03-31	$19,943,820	94,700	+105.0%	Put	Sole	2022-05-11
2021-12-31	$11,084,304	46,200	-14.0%	Put	Sole	2022-02-10
2021-12-31	$6,381,872	26,600	+77.3%	Call	Sole	2022-02-10
2021-09-30	$4,244,850	15,000	+417.2%	Call	Sole	2021-11-12
2021-09-30	$15,196,563	53,700	+6.5%	Put	Sole	2021-11-12
2021-06-30	$17,452,008	50,400	-25.4%	Put	Sole	2021-08-12
2021-06-30	$4,424,291	12,777	-87.1%	Shares	Sole	2021-08-12
2021-03-31	$811,275	2,900	-39.6%	Call	Sole	2021-05-17
2021-03-31	$27,814,143	99,425	+90.8%	Shares	Sole	2021-05-17
2021-03-31	$18,911,100	67,600	0.0%	Put	Sole	2021-05-17
2020-12-31	$16,552,536	67,600	-78.8%	Put	Sole	2021-02-12
2020-12-31	$12,761,123	52,116	-25.8%	Shares	Sole	2021-02-12
2020-12-31	$1,175,328	4,800	-7.7%	Call	Sole	2021-02-12
2020-09-30	$19,936,463	70,278	+37.8%	Shares	Sole	2020-11-13
2020-09-30	$1,475,136	5,200	-62.9%	Call	Sole	2020-11-13
2020-09-30	$90,380,448	318,600	+6.8%	Put	Sole	2020-11-13
2020-06-30	$79,836,920	298,400	+47.6%	Put	Sole	2020-08-12
2020-06-30	$13,649,598	51,017	+120.0%	Shares	Sole	2020-08-12
2020-03-31	$7,335,586	23,186	—	Shares	Sole	2020-05-13
2020-03-31	$4,429,320	14,000	—	Call	Sole	2020-05-13
2020-03-31	$63,972,036	202,200	—	Put	Sole	2020-05-13
No filing history on record for this holder in this stock.