Parallax Volatility Advisers, L.P.

Position in UNP — Union Pacific Corp

CIK 1521001 San Francisco, CA

Back to UNP Full portfolio

Position in UNP

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

Position Value

$7,182,704

+$5,080,645 QoQ

Shares Held

26,407

+204.8% QoQ

Ownership

0.004%

of shares outstanding

% of Portfolio

0.35%

of 13F equity value

Holder Rank

#662

of 2,882 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in UNP Over Time

Shares Held

Position Value (USD)

Derivatives in UNP

reported options exposure · as of Jun 30, 2026

CallValue

$108,800

CallShares

400

PutValue

$81,600

PutShares

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 Railroads

Industrials · as of Jun 30, 2026

Parallax Volatility Advisers, L.P. holds $7,847,838 across 2 Railroads names. UNP ranks #1 (91.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)	Open
1	UNP	Union Pacific Corp This page	26,407	$7,182,704
2	CSX	Csx Corp	13,994	$665,134

All Filings in UNP

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50 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$81,600	300	-94.0%	Put	Sole	2026-08-14
2026-06-30	$7,182,704	26,407	+204.8%	Shares	Sole	2026-08-14
2026-06-30	$108,800	400	-94.8%	Call	Sole	2026-08-14
2026-03-31	$2,102,059	8,664	+866300.0%	Shares	Sole	2026-05-15
2026-03-31	$1,868,174	7,700	-92.8%	Call	Sole	2026-05-15
2026-03-31	$1,213,100	5,000	-85.7%	Put	Sole	2026-05-15
2025-12-31	$24,820,636	107,300	-23.9%	Call	Sole	2026-02-17
2025-12-31	$8,096,200	35,000	+821.1%	Put	Sole	2026-02-17
2025-09-30	$33,328,170	141,000	-47.3%	Call	Sole	2025-11-14
2025-09-30	$898,206	3,800	-75.6%	Put	Sole	2025-11-14
2025-06-30	$3,589,248	15,600	+56.0%	Put	Sole	2025-08-14
2025-06-30	$61,500,384	267,300	+193.4%	Call	Sole	2025-08-14
2025-03-31	$21,521,464	91,100	+776.0%	Call	Sole	2025-05-15
2025-03-31	$236	1	-50.0%	Shares	Sole	2025-05-15
2024-12-31	$2,280,400	10,000	-4.8%	Put	Sole	2025-02-14
2024-12-31	$2,371,616	10,400	-5.5%	Call	Sole	2025-02-14
2024-12-31	$456	2	-100.0%	Shares	Sole	2025-02-14
2024-09-30	$2,140,678	8,685	-80.3%	Shares	Sole	2024-11-14
2024-09-30	$2,711,280	11,000	-7.6%	Call	Sole	2024-11-14
2024-09-30	$2,588,040	10,500	-83.6%	Put	Sole	2024-11-14
2024-06-30	$14,503,266	64,100	+18.3%	Put	Sole	2024-08-14
2024-06-30	$2,692,494	11,900	-85.2%	Call	Sole	2024-08-14
2024-06-30	$9,956,797	44,006	+37.6%	Shares	Sole	2024-08-14
2024-03-31	$19,772,772	80,400	-56.2%	Call	Sole	2024-05-15
2024-03-31	$7,867,300	31,990	+2590.5%	Shares	Sole	2024-05-15
2024-03-31	$13,329,406	54,200	-58.9%	Put	Sole	2024-05-15
2023-12-31	$45,120,394	183,700	+65.8%	Call	Sole	2024-02-14
2023-12-31	$32,421,840	132,000	+80.3%	Put	Sole	2024-02-14
2023-09-30	$22,562,204	110,800	+33.7%	Call	Sole	2023-11-14
2023-09-30	$242,116	1,189	-91.6%	Shares	Sole	2023-11-14
2023-09-30	$14,905,716	73,200	+179.4%	Put	Sole	2023-11-14
2023-06-30	$16,962,998	82,900	-15.3%	Call	Sole	2023-08-14
2023-06-30	$5,361,044	26,200	-71.8%	Put	Sole	2023-08-14
2023-03-31	$19,703,354	97,900	-62.0%	Call	Sole	2023-05-15
2023-03-31	$2,865,137	14,236	-69.0%	Shares	Sole	2023-05-15
2023-03-31	$18,717,180	93,000	+21.7%	Put	Sole	2023-05-15
2022-12-31	$15,820,148	76,400	-59.1%	Put	Sole	2023-02-27
2022-12-31	$53,279,111	257,300	-43.7%	Call	Sole	2023-02-27
2022-09-30	$36,392,376	186,800	-12.3%	Put	Sole	2022-11-21
2022-09-30	$89,032,740	457,000	+65.6%	Call	Sole	2022-11-21
2022-06-30	$45,428,640	213,000	+14.3%	Put	Sole	2022-08-17
2022-06-30	$58,843,952	275,900	+5.5%	Call	Sole	2022-08-17
2022-06-30	$9,783,793	45,873	+202.2%	Shares	Sole	2022-08-17
2022-03-31	$71,471,736	261,600	+23681.8%	Call	Sole	2022-05-16
2022-03-31	$50,899,023	186,300	+94.3%	Put	Sole	2022-05-16
2022-03-31	$4,147,327	15,180	-64.1%	Shares	Sole	2022-05-16
2021-12-31	$10,648,577	42,268	—	Shares	Sole	2022-02-14
2021-12-31	$24,160,087	95,900	-56.5%	Put	Sole	2022-02-14
2021-12-31	$277,123	1,100	—	Call	Sole	2022-02-14
2021-09-30	$43,259,407	220,700	—	Put	Sole	2021-11-15
No filing history on record for this holder in this stock.