Twin Tree Management, LP

Position in CNI — Canadian National Railway Co

CIK 1535588 DALLAS, TX

Back to CNI Full portfolio

Position in CNI

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

Position Value

$256,127

-$530,577 QoQ

Shares Held

2,148

-71.9% QoQ

Ownership

0.000%

of shares outstanding

% of Portfolio

0.04%

of 13F equity value

Holder Rank

#609

of 843 holders

Holding Since

Mar 2020

21 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in CNI Over Time

Shares Held

Position Value (USD)

Derivatives in CNI

reported options exposure · as of Jun 30, 2026

CallValue

CallShares

PutValue

$3,326,796

PutShares

27,900

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 Railroads

Industrials · as of Jun 30, 2026

Twin Tree Management, LP holds $4,031,100 across 4 Railroads names. CNI ranks #3 (6.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	UNP	Union Pacific Corp	11,229	$3,054,288
2	CSX	Csx Corp	15,072	$716,372
3	CNI	Canadian National Railway Co This page	2,148	$256,127
4	WAB	Westinghouse Air Brake Technologies Corp	16	$4,313

All Filings in CNI

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43 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$256,127	2,148	-71.9%	Shares	Sole	2026-08-12
2026-06-30	$3,326,796	27,900	-90.9%	Put	Sole	2026-08-12
2026-03-31	$786,704	7,655	-36.7%	Shares	Sole	2026-05-14
2026-03-31	$472,742	4,600	-83.3%	Call	Sole	2026-05-14
2025-12-31	$1,195,788	12,097	-93.7%	Shares	Sole	2026-02-11
2025-12-31	$2,728,260	27,600	-77.5%	Call	Sole	2026-02-11
2025-09-30	$11,580,040	122,800	+514.0%	Call	Sole	2025-11-13
2025-09-30	$28,799,220	305,400	+264.9%	Put	Sole	2025-11-13
2025-09-30	$18,131,815	192,278	-37.1%	Shares	Sole	2025-11-13
2025-06-30	$2,080,800	20,000	+733.3%	Call	Sole	2025-07-28
2025-06-30	$31,780,578	305,465	+393.3%	Shares	Sole	2025-07-28
2025-03-31	$6,034,625	61,919	-3.3%	Shares	Sole	2025-05-15
2025-03-31	$233,904	2,400	-92.9%	Call	Sole	2025-05-15
2025-03-31	$8,157,402	83,700	-30.7%	Put	Sole	2025-05-15
2024-12-31	$3,410,736	33,600	-53.8%	Call	Sole	2025-02-10
2024-12-31	$12,262,408	120,800	+67.1%	Put	Sole	2025-02-10
2024-12-31	$6,502,527	64,058	+262.9%	Shares	Sole	2025-02-10
2024-09-30	$8,528,520	72,800	+71.3%	Call	Sole	2024-11-13
2024-09-30	$2,067,697	17,650	+175.4%	Shares	Sole	2024-11-13
2024-09-30	$8,469,945	72,300	+803.8%	Put	Sole	2024-11-13
2024-06-30	$757,213	6,410	-40.2%	Shares	Sole	2024-08-13
2024-06-30	$5,020,525	42,500	+18.4%	Call	Sole	2024-08-13
2024-06-30	$945,040	8,000	-98.9%	Put	Sole	2024-08-13
2024-03-31	$4,728,389	35,900	-83.6%	Call	Sole	2024-05-09
2022-12-31	$1,274,393	10,720	-86.0%	Shares	Sole	2023-02-13
2022-09-30	$8,281,537	76,688	-75.0%	Shares	Sole	2022-11-10
2022-06-30	$34,464,182	306,430	+508.0%	Shares	Sole	2022-08-11
2022-03-31	$29,390,074	219,100	-33.5%	Call	Sole	2022-05-11
2022-03-31	$6,760,924	50,402	-79.5%	Shares	Sole	2022-05-11
2022-03-31	$100,752,554	751,100	+4.7%	Put	Sole	2022-05-11
2021-12-31	$40,470,084	329,400	—	Call	Sole	2022-02-10
2021-12-31	$88,164,336	717,600	+77.6%	Put	Sole	2022-02-10
2021-12-31	$30,203,165	245,834	+505.3%	Shares	Sole	2022-02-10
2021-09-30	$46,722,600	404,000	+34.5%	Put	Sole	2021-11-12
2021-06-30	$31,687,656	300,300	+1050.6%	Put	Sole	2021-08-12
2021-06-30	$4,285,272	40,611	+1479.0%	Shares	Sole	2021-08-12
2021-03-31	$298,300	2,572	-78.3%	Shares	Sole	2021-05-17
2021-03-31	$3,027,078	26,100	-63.0%	Put	Sole	2021-05-17
2020-09-30	$1,263,680	11,870	+0.8%	Shares	Sole	2020-11-13
2020-06-30	$6,253,042	70,600	+25.2%	Put	Sole	2020-08-12
2020-06-30	$1,042,911	11,775	-65.2%	Shares	Sole	2020-08-12
2020-03-31	$4,378,332	56,400	—	Put	Sole	2020-05-13
2020-03-31	$2,623,117	33,790	—	Shares	Sole	2020-05-13
No filing history on record for this holder in this stock.