Parallax Volatility Advisers, L.P.

Position in KLAC — Kla Corp

CIK 1521001 San Francisco, CA

Back to KLAC Full portfolio

Position in KLAC

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

Position Value

$1,376,099

-$582,206 QoQ

Shares Held

4,561

-65.7% QoQ

Ownership

0.000%

of shares outstanding

% of Portfolio

0.07%

of 13F equity value

Holder Rank

#1,309

of 2,481 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in KLAC Over Time

Shares Held

Position Value (USD)

Derivatives in KLAC

reported options exposure · as of Jun 30, 2026

CallValue

$15,085,500

CallShares

50,000

PutValue

$7,633,263

PutShares

25,300

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 Semiconductor Equipment & Materials

Technology · as of Jun 30, 2026

Parallax Volatility Advisers, L.P. holds $99,850,985 across 5 Semiconductor Equipment & Materials names. KLAC ranks #4 (1.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	AMAT	Applied Materials Inc /De	76,903	$55,600,869
2	LRCX	Lam Research Corp	70,231	$30,433,199
3	TER	Teradyne, Inc	24,720	$11,960,524
4	KLAC	Kla Corp This page	4,561	$1,376,099
5	Q	Qnity Electronics, Inc.	2,941	$480,294

All Filings in KLAC

Export CSV

50 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$1,376,099	4,561	+242.9%	Shares	Sole	2026-08-14
2026-06-30	$7,633,263	25,300	+4116.7%	Put	Sole	2026-08-14
2026-06-30	$15,085,500	50,000	+9900.0%	Call	Sole	2026-08-14
2026-03-31	$1,958,305	1,330	+3.8%	Shares	Sole	2026-05-15
2026-03-31	$883,446	600	+500.0%	Put	Sole	2026-05-15
2026-03-31	$736,205	500	-70.6%	Call	Sole	2026-05-15
2025-12-31	$121,508	100	-88.9%	Put	Sole	2026-02-17
2025-12-31	$1,556,517	1,281	-6.6%	Shares	Sole	2026-02-17
2025-09-30	$1,479,839	1,372	-86.8%	Shares	Sole	2025-11-14
2025-06-30	$806,166	900	-94.6%	Put	Sole	2025-08-14
2025-06-30	$1,522,758	1,700	-52.8%	Call	Sole	2025-08-14
2025-03-31	$7,053,604	10,376	+2093.7%	Shares	Sole	2025-05-15
2025-03-31	$11,352,660	16,700	-44.1%	Put	Sole	2025-05-15
2025-03-31	$2,447,280	3,600	-52.0%	Call	Sole	2025-05-15
2024-12-31	$4,725,900	7,500	-33.6%	Call	Sole	2025-02-14
2024-12-31	$18,840,588	29,900	+43.8%	Put	Sole	2025-02-14
2024-09-30	$16,107,728	20,800	+177.3%	Put	Sole	2024-11-14
2024-09-30	$8,750,833	11,300	-78.4%	Call	Sole	2024-11-14
2024-06-30	$6,183,825	7,500	-68.9%	Put	Sole	2024-08-14
2024-06-30	$389,993	473	-5.6%	Shares	Sole	2024-08-14
2024-03-31	$349,983	501	-74.7%	Shares	Sole	2024-05-15
2024-03-31	$16,835,537	24,100	-32.3%	Put	Sole	2024-05-15
2023-12-31	$1,150,974	1,980	-95.4%	Shares	Sole	2024-02-14
2023-12-31	$30,460,120	52,400	+1178.0%	Call	Sole	2024-02-14
2023-12-31	$20,694,280	35,600	-6.8%	Put	Sole	2024-02-14
2023-09-30	$17,520,812	38,200	+170.9%	Put	Sole	2023-11-14
2023-09-30	$19,861,812	43,304	+6.9%	Shares	Sole	2023-11-14
2023-09-30	$1,880,506	4,100	+64.0%	Call	Sole	2023-11-14
2023-06-30	$6,838,782	14,100	-23.0%	Put	Sole	2023-08-14
2023-06-30	$1,212,550	2,500	-80.5%	Call	Sole	2023-08-14
2023-06-30	$19,654,465	40,523	+10.9%	Shares	Sole	2023-08-14
2023-03-31	$14,581,280	36,529	+40.5%	Shares	Sole	2023-05-15
2023-03-31	$5,109,376	12,800	-89.1%	Call	Sole	2023-05-15
2023-03-31	$7,304,811	18,300	-86.5%	Put	Sole	2023-05-15
2022-12-31	$51,049,862	135,400	+248.1%	Put	Sole	2023-02-27
2022-12-31	$44,112,510	117,000	+65.5%	Call	Sole	2023-02-27
2022-12-31	$9,802,402	25,999	+35033.8%	Shares	Sole	2023-02-27
2022-09-30	$11,772,307	38,900	+94.5%	Put	Sole	2022-11-21
2022-09-30	$22,394	74	+428.6%	Shares	Sole	2022-11-21
2022-09-30	$21,395,941	70,700	+244.9%	Call	Sole	2022-11-21
2022-06-30	$4,467	14	0.0%	Shares	Sole	2022-08-17
2022-06-30	$6,541,140	20,500	-63.6%	Call	Sole	2022-08-17
2022-06-30	$6,381,600	20,000	-71.6%	Put	Sole	2022-08-17
2022-03-31	$5,124	14	-99.8%	Shares	Sole	2022-05-16
2022-03-31	$25,807,230	70,500	-35.9%	Put	Sole	2022-05-16
2022-03-31	$20,609,178	56,300	+10.6%	Call	Sole	2022-05-16
2021-12-31	$21,892,599	50,900	-9.3%	Call	Sole	2022-02-14
2021-12-31	$47,269,089	109,900	—	Put	Sole	2022-02-14
2021-12-31	$3,934,216	9,147	—	Shares	Sole	2022-02-14
2021-09-30	$18,766,011	56,100	—	Call	Sole	2021-11-15
No filing history on record for this holder in this stock.