Parallax Volatility Advisers, L.P.

Position in OPEN — Opendoor Technologies Inc.

CIK 1521001 San Francisco, CA

Back to OPEN Full portfolio

Position in OPEN

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

Position Value

$296,239

-$262,693 QoQ

Shares Held

64,121

-46.3% QoQ

Ownership

0.007%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

#150

of 406 holders

Holding Since

Dec 2020

18 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in OPEN Over Time

Shares Held

Position Value (USD)

Derivatives in OPEN

reported options exposure · as of Jun 30, 2026

CallValue

$8,316

CallShares

1,800

PutValue

$4,158

PutShares

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 Real Estate Services

Real Estate · as of Jun 30, 2026

Parallax Volatility Advisers, L.P. holds $296,239 across 1 Real Estate Services name. OPEN ranks #1 (100.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)	Open
1	OPEN	Opendoor Technologies Inc. This page	64,121	$296,239

All Filings in OPEN

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47 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$4,158	900	-98.1%	Put	Sole	2026-08-14
2026-06-30	$296,239	64,121	-46.3%	Shares	Sole	2026-08-14
2026-06-30	$8,316	1,800	-93.4%	Call	Sole	2026-08-14
2026-03-31	$558,932	119,430	-41.0%	Shares	Sole	2026-05-15
2026-03-31	$226,980	48,500	-74.4%	Put	Sole	2026-05-15
2026-03-31	$128,232	27,400	-86.4%	Call	Sole	2026-05-15
2025-12-31	$1,179,414	202,301	+440.9%	Shares	Sole	2026-02-17
2025-12-31	$1,103,036	189,200	+30.5%	Put	Sole	2026-02-17
2025-12-31	$1,173,579	201,300	+113.2%	Call	Sole	2026-02-17
2025-09-30	$752,368	94,400	+15.5%	Call	Sole	2025-11-14
2025-09-30	$298,078	37,400	+3233.3%	Shares	Sole	2025-11-14
2025-09-30	$1,155,650	145,000	+383.3%	Put	Sole	2025-11-14
2024-09-30	$2,244	1,122	-75.9%	Shares	Sole	2024-11-14
2024-09-30	$60,000	30,000	+5900.0%	Put	Sole	2024-11-14
2023-12-31	$20,854	4,655	+114.7%	Shares	Sole	2024-02-14
2023-12-31	$366,016	81,700	0.0%	Call	Sole	2024-02-14
2023-09-30	$215,688	81,700	-15.2%	Call	Sole	2023-11-14
2023-09-30	$5,723	2,168	-88.4%	Shares	Sole	2023-11-14
2023-06-30	$387,528	96,400	+9.7%	Call	Sole	2023-08-14
2023-06-30	$75,278	18,726	+1091.2%	Shares	Sole	2023-08-14
2023-06-30	$2,010	500	+150.0%	Put	Sole	2023-08-14
2023-03-31	$352	200	-99.5%	Put	Sole	2023-05-15
2023-03-31	$2,766	1,572	-96.7%	Shares	Sole	2023-05-15
2023-03-31	$154,704	87,900	-74.6%	Call	Sole	2023-05-15
2022-12-31	$44,776	38,600	-96.4%	Put	Sole	2023-02-27
2022-12-31	$401,244	345,900	-15.2%	Call	Sole	2023-02-27
2022-09-30	$3,302,820	1,062,000	+8.2%	Put	Sole	2022-11-21
2022-09-30	$1,268,258	407,800	+24.6%	Call	Sole	2022-11-21
2022-09-30	$150,107	48,266	-78.3%	Shares	Sole	2022-11-21
2022-06-30	$1,045,761	222,030	-38.0%	Shares	Sole	2022-08-17
2022-06-30	$4,620,981	981,100	-10.6%	Put	Sole	2022-08-17
2022-06-30	$1,542,054	327,400	-49.8%	Call	Sole	2022-08-17
2022-03-31	$5,644,990	652,600	+16.2%	Call	Sole	2022-05-16
2022-03-31	$9,497,700	1,098,000	-20.1%	Put	Sole	2022-05-16
2022-03-31	$3,098,265	358,181	-37.8%	Shares	Sole	2022-05-16
2021-12-31	$20,074,140	1,374,000	+382.1%	Put	Sole	2022-02-14
2021-12-31	$8,409,983	575,632	+674.3%	Shares	Sole	2022-02-14
2021-12-31	$8,202,054	561,400	+76.7%	Call	Sole	2022-02-14
2021-09-30	$5,851,050	285,000	+25809.1%	Put	Sole	2021-11-15
2021-09-30	$6,524,434	317,800	+31680.0%	Call	Sole	2021-11-15
2021-06-30	$1,318,119	74,344	—	Shares	Sole	2021-08-16
2021-06-30	$19,503	1,100	-99.1%	Put	Sole	2021-08-16
2021-06-30	$17,730	1,000	-99.0%	Call	Sole	2021-08-16
2021-03-31	$2,119,000	100,000	+1.1%	Call	Sole	2021-05-14
2021-03-31	$2,701,725	127,500	+155.0%	Put	Sole	2021-05-14
2020-12-31	$2,247,997	98,900	—	Call	Sole	2021-02-16
2020-12-31	$1,136,500	50,000	—	Put	Sole	2021-02-16
No filing history on record for this holder in this stock.