Parallax Volatility Advisers’s Seagate STX Stock Holding History

Parallax Volatility Advisers’s Portfolio STX Stock Details STX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$13.3M	Buy	34,000 +4,000	+13%	+$1.53M	0.03%	334
2025 Q4	$8.26M	Sell	30,000 -4,900	-14%	-$1.27M	0.02%	518
2025 Q3	$8.24M	Buy	+34,900	New	+$5.96M	0.01%	530
2025 Q1	–	Sell	-260,000	Closed	-$22.4M	–	2100
2024 Q4	$22.4M	Sell	260,000 -89,900	-26%	-$9.05M	0.04%	323
2024 Q3	$38.3M	Buy	349,900 +155,000	+80%	+$15.8M	0.07%	210
2024 Q2	$20.1M	Sell	194,900 -300	-0.2%	-$28K	0.04%	300
2024 Q1	$18.2M	Sell	195,200 -137,000	-41%	-$12M	0.04%	344
2023 Q4	$28.4M	Buy	332,200 +18,000	+6%	+$1.34M	0.06%	297
2023 Q3	$20.7M	Sell	314,200 -31,000	-9%	-$2M	0.05%	324
2023 Q2	$21.4M	Buy	345,200 +35,000	+11%	+$2.14M	0.05%	325
2023 Q1	$20.5M	Sell	310,200 -145,000	-32%	-$9.23M	0.04%	375
2022 Q4	$23.9M	Sell	455,200 -56,800	-11%	-$3.02M	0.04%	465
2022 Q3	$27.2M	Buy	512,000 +315,300	+160%	+$22.8M	0.04%	438
2022 Q2	$14M	Sell	196,700 -191,600	-49%	-$15.6M	0.01%	602
2022 Q1	$34.9M	Sell	388,300 -386,200	-50%	-$39.5M	0.02%	356
2021 Q4	$87.5M	Buy	774,500 +168,500	+28%	+$16.4M	0.1%	138
2021 Q3	$50M	Buy	606,000 +372,100	+159%	+$32.4M	0.05%	253
2021 Q2	$20.6M	Buy	233,900 +122,900	+111%	+$11.1M	0.03%	359
2021 Q1	$8.52M	Sell	111,000 -279,900	-72%	-$19.5M	0.02%	417
2020 Q4	$24.3M	Sell	390,900 -161,600	-29%	-$9.08M	0.02%	473
2020 Q3	$27.2M	Buy	552,500 +226,300	+69%	+$10.6M	0.02%	614
2020 Q2	$15.8M	Buy	326,200 +45,200	+16%	+$2.27M	0.02%	599
2020 Q1	$13.7M	Sell	281,000 -503,500	-64%	-$26.9M	0.02%	500
2019 Q4	$46.7M	Buy	784,500 +151,600	+24%	+$8.71M	0.05%	228
2019 Q3	$34M	Sell	632,900 -173,400	-22%	-$8.51M	0.04%	251
2019 Q2	$38M	Buy	806,300 +276,100	+52%	+$12.8M	0.04%	220
2019 Q1	$25.4M	Sell	530,200 -395,000	-43%	-$17.5M	0.03%	269
2018 Q4	$35.7M	Buy	925,200 +674,700	+269%	+$28.4M	0.05%	236
2018 Q3	$11.9M	Sell	250,500 -6,300	-2%	-$337K	0.01%	417
2018 Q2	$14.5M	Sell	256,800 -247,600	-49%	-$14.3M	0.02%	346
2018 Q1	$29.5M	Sell	504,400 -8,200	-2%	-$436K	0.04%	186
2017 Q4	$21.4M	Buy	512,600 +426,300	+494%	+$16.3M	0.03%	244
2017 Q3	$2.86M	Sell	86,300 -533,700	-86%	-$18.1M	﹤0.01%	737
2017 Q2	$24M	Buy	620,000 +550,200	+788%	+$24M	0.05%	224
2017 Q1	$3.21M	Buy	69,800 +41,000	+142%	+$1.82M	0.01%	710
2016 Q4	$1.1M	Sell	28,800 -107,700	-79%	-$4.02M	﹤0.01%	1190
2016 Q3	$5.26M	Buy	136,500 +84,000	+160%	+$2.73M	0.01%	650
2016 Q2	$1.28M	Buy	52,500 +19,400	+59%	+$470K	﹤0.01%	1091
2016 Q1	$1.14M	Sell	33,100 -18,600	-36%	-$599K	﹤0.01%	1135
2015 Q4	$1.9M	Sell	51,700 -42,100	-45%	-$1.6M	﹤0.01%	1030
2015 Q3	$4.2M	Buy	93,800 +44,900	+92%	+$2.17M	0.01%	736
2015 Q2	$2.32M	Sell	48,900 -369,800	-88%	-$20.4M	﹤0.01%	1010
2015 Q1	$21.8M	Sell	418,700 -8,200	-2%	-$488K	0.05%	293
2014 Q4	$28.4M	Buy	426,900 +235,600	+123%	+$14.6M	0.08%	229
2014 Q3	$11M	Buy	191,300 +113,500	+146%	+$6.72M	0.03%	423
2014 Q2	$4.42M	Buy	77,800 +700	+0.9%	+$37.7K	0.02%	520
2014 Q1	$4.33M	Buy	77,100 +58,600	+317%	+$3.14M	0.03%	418
2013 Q4	$1.04M	Buy	18,500 +5,800	+46%	+$287K	0.01%	833
2013 Q3	$558K	Sell	12,700 -77,300	-86%	-$3.25M	﹤0.01%	799
2013 Q2	$4.03M	Buy	+90,000	New	+$3.63M	0.02%	461

Other funds holding STX

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Sanders Capital West Palm Beach, Florida $83.9B AUM 37.89% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Parallax Volatility Advisers's STX Position: Q1 2026 in Review

Parallax Volatility Advisers sold out of Seagate (STX) in Q1 2026, closing a stake of 27,658 shares — an estimated $10.6M sold.

Parallax Volatility Advisers first reported a position in STX in Q2 2013 and held it in 28 quarters. The position peaked at $14.7M in Q3 2021. 1,455 funds tracked by Wall St. Rank hold STX as of Q1 2026.

Parallax Volatility Advisers reported no remaining Seagate position as of Q1 2026 after selling out during the quarter.
Parallax Volatility Advisers sold 27,658 Seagate shares in Q1 2026, an estimated $10.6M.
Parallax Volatility Advisers first reported a position in Seagate in Q2 2013 and held it in 28 quarters.
Parallax Volatility Advisers's Seagate position peaked at $14.7M in Q3 2021.
1,455 funds tracked by Wall St. Rank held Seagate as of Q1 2026.

Based on Parallax Volatility Advisers's 13F filing for Q1 2026, filed 15 May 2026.