JANE STREET GROUP, LLC

Position in MLI — Mueller Industries Inc

CIK 1595888 NEW YORK, NY

Back to MLI Full portfolio

Position in MLI

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

Position Value

$18,907,354

+$6,619,392 QoQ

Shares Held

341,288

+59.4% QoQ

Ownership

0.309%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2021

21 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in MLI Over Time

Shares Held

Position Value (USD)

Derivatives in MLI

reported options exposure · as of Mar 31, 2026

CallValue

$2,066,420

CallShares

37,300

PutValue

$459,820

PutShares

8,300

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 Metal Fabrication

Industrials · as of Mar 31, 2026

JANE STREET GROUP, LLC holds $313,306,433 across 11 Metal Fabrication names. MLI ranks #3 (6.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ATI	Ati Inc	1,491,263	$216,919,115
2	CRS	Carpenter Technology Corp	161,131	$63,509,782
3	MLI	Mueller Industries Inc This page	341,288	$18,907,354
4	WOR	Worthington Enterprises, Inc.	91,599	$4,775,970
5	PRLB	Proto Labs Inc	57,355	$3,270,381
6	IIIN	Insteel Industries Inc	80,645	$2,710,477
7	AP	Ampco Pittsburgh Corp	168,301	$1,130,981
8	RYZ	Ryerson Holding Corp	36,312	$816,293

All Filings in MLI

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36 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$2,066,420	37,300	+349.4%	Call	Defined	2026-05-12
2026-03-31	$459,820	8,300	-97.6%	Put	Defined	2026-05-12
2026-03-31	$18,907,354	341,288	+59.4%	Shares	Defined	2026-05-12
2025-12-31	$12,287,962	214,076	+981.2%	Shares	Defined	2026-02-12
2025-12-31	$1,136,520	19,800	+800.0%	Call	Defined	2026-02-12
2025-12-31	$126,280	2,200	-69.9%	Put	Defined	2026-02-12
2025-09-30	$369,051	7,300	+160.7%	Call	Defined	2025-11-14
2025-09-30	$141,554	2,800	-99.6%	Put	Defined	2025-11-14
2025-09-30	$36,533,115	722,641	+1853.1%	Shares	Defined	2025-11-14
2025-06-30	$1,470,195	37,000	-97.5%	Call	Defined	2025-08-14
2025-06-30	$59,916,128	1,507,893	+336.0%	Shares	Defined	2025-08-14
2025-03-31	$13,165,100	345,813	+2252.5%	Shares	Defined	2025-05-19
2025-03-31	$559,629	14,700	+54.7%	Put	Defined	2025-05-19
2025-03-31	$361,665	9,500	+115.9%	Call	Defined	2025-05-19
2024-12-31	$174,592	4,400	-96.1%	Call	Defined	2025-02-14
2024-12-31	$4,464,514	112,513	+971.6%	Shares	Defined	2025-02-14
2024-12-31	$416,640	10,500	-94.3%	Put	Defined	2025-02-14
2024-09-30	$6,848,580	184,847	+5676.5%	Shares	Defined	2024-11-15
2024-09-30	$118,560	3,200	-96.6%	Call	Defined	2024-11-15
2024-06-30	$2,716,009	95,399	+238.7%	Shares	Defined	2024-08-15
2024-03-31	$759,576	28,169	-74.3%	Shares	Defined	2024-05-16
2023-12-31	$2,582,734	109,554	+631.4%	Shares	Defined	2024-02-15
2023-09-30	$281,436	14,978	+3.6%	Shares	Defined	2023-11-15
2023-06-30	$315,494	14,459	+140.9%	Shares	Defined	2023-08-14
2023-03-31	$110,256	6,002	-84.9%	Shares	Defined	2023-05-16
2022-12-31	$586,740	39,779	+193.6%	Shares	Defined	2023-02-15
2022-09-30	$201,367	13,551	+158.9%	Shares	Defined	2022-11-15
2022-06-30	$69,729	5,234	-65.1%	Shares	Defined	2022-08-16
2022-03-31	$203,137	15,000	-10.9%	Put	Defined	2022-05-17
2022-03-31	$228,109	16,844	+163.2%	Shares	Defined	2022-05-17
2022-03-31	$86,672	6,400	-81.9%	Call	Defined	2022-05-17
2021-12-31	$524,697	35,357	+359.2%	Shares	Defined	2022-02-15
2021-12-31	$114,268	7,700	+51.1%	Put	Defined	2022-02-15
2021-09-30	$52,371	5,097	-73.3%	Shares	Defined	2021-11-16
2021-06-30	$206,372	19,060	+54.7%	Shares	Defined	2021-08-16
2021-03-31	$127,326	12,317	—	Shares	Defined	2021-05-18
No filing history on record for this holder in this stock.