Parallax Volatility Advisers’s Berkshire Hathaway Class B BRK.B Stock Holding History

Parallax Volatility Advisers’s Portfolio BRK.B Stock Details BRK.B Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$106M	Sell	222,200 -103,000	-32%	-$50.6M	0.28%	61
2025 Q4	$163M	Buy	325,200 +42,300	+15%	+$21M	0.32%	52
2025 Q3	$142M	Sell	282,900 -23,500	-8%	-$11.4M	0.22%	48
2025 Q2	$149M	Sell	306,400 -286,100	-48%	-$145M	0.34%	48
2025 Q1	$316M	Sell	592,500 -124,100	-17%	-$60.3M	0.85%	14
2024 Q4	$325M	Buy	716,600 +16,400	+2%	+$7.57M	0.63%	22
2024 Q3	$322M	Sell	700,200 -27,400	-4%	-$12.1M	0.59%	24
2024 Q2	$296M	Sell	727,600 -21,500	-3%	-$8.79M	0.64%	22
2024 Q1	$315M	Buy	749,100 +481,800	+180%	+$190M	0.71%	21
2023 Q4	$95.3M	Buy	267,300 +15,800	+6%	+$5.55M	0.19%	85
2023 Q3	$88.1M	Sell	251,500 -4,300	-2%	-$1.53M	0.2%	87
2023 Q2	$87.2M	Sell	255,800 -91,000	-26%	-$29.7M	0.19%	88
2023 Q1	$107M	Buy	346,800 +102,600	+42%	+$31.6M	0.22%	70
2022 Q4	$75.4M	Sell	244,200 -9,400	-4%	-$2.79M	0.12%	195
2022 Q3	$67.7M	Buy	253,600 +103,500	+69%	+$29.5M	0.1%	197
2022 Q2	$41M	Sell	150,100 -275,300	-65%	-$86.4M	0.04%	324
2022 Q1	$152M	Buy	+425,400	New	+$138M	0.08%	77
2020 Q4	–	Sell	-1,940,800	Closed	-$413M	–	2486
2020 Q3	$413M	Buy	1,940,800 +970,300	+100%	+$198M	0.31%	47
2020 Q2	$173M	Buy	970,500 +160,700	+20%	+$29.3M	0.2%	70
2020 Q1	$148M	Buy	809,800 +506,300	+167%	+$108M	0.19%	72
2019 Q4	$68.7M	Buy	303,500 +104,600	+53%	+$22.7M	0.08%	174
2019 Q3	$41.4M	Buy	198,900 +183,900	+1,226%	+$37.9M	0.05%	219
2019 Q2	$3.2M	Sell	15,000 -10,000	-40%	-$2.07M	﹤0.01%	892
2019 Q1	$5.02M	Sell	25,000 -75,800	-75%	-$15.3M	0.01%	693
2018 Q4	$20.6M	Buy	100,800 +5,800	+6%	+$1.21M	0.03%	335
2018 Q3	$20.3M	Buy	95,000 +10,000	+12%	+$2.05M	0.02%	293
2018 Q2	$15.9M	Sell	85,000 -60,500	-42%	-$11.8M	0.02%	319
2018 Q1	$29M	Buy	145,500 +37,500	+35%	+$7.7M	0.04%	191
2017 Q4	$21.4M	Buy	108,000 +63,000	+140%	+$12M	0.03%	245
2017 Q3	$8.25M	Buy	+45,000	New	+$7.95M	0.01%	449
2017 Q2	–	Sell	-106,000	Closed	-$17.7M	–	2342
2017 Q1	$17.7M	Buy	106,000 +7,100	+7%	+$1.19M	0.04%	263
2016 Q4	$16.1M	Buy	+98,900	New	+$15.2M	0.03%	323
2016 Q1	–	Sell	-75,900	Closed	-$10M	–	2538
2015 Q4	$10M	Sell	75,900 -15,000	-17%	-$2.01M	0.02%	458
2015 Q3	$11.9M	Buy	+90,900	New	+$12.5M	0.03%	380
2015 Q1	–	Sell	-137,300	Closed	-$20.6M	–	4413
2014 Q4	$20.6M	Buy	+137,300	New	+$19.8M	0.06%	292
2014 Q2	–	Sell	-60,300	Closed	-$7.54M	–	4048
2014 Q1	$7.54M	Buy	60,300 +59,200	+5,382%	+$6.92M	0.04%	299
2013 Q4	$130K	Hold	1,100	–	–	﹤0.01%	1696
2013 Q3	$125K	Hold	1,100	–	–	﹤0.01%	1333
2013 Q2	$123K	Buy	+1,100	New	+$121K	﹤0.01%	1194

Other funds holding BRK.B

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

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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

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

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Gates Foundation Trust Kirkland, Washington $31.7B AUM 20.52% 1-Year Est. Return

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

Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return

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

Parallax Volatility Advisers's BRK.B Position: Q1 2026 in Review

Parallax Volatility Advisers increased its Berkshire Hathaway Class B (BRK.B) stake by 992% in Q1 2026, buying an estimated $14.9M and bringing the position to 33,311 shares worth $15.9M. The position accounts for 0.04% of the portfolio, ranked #301.

Parallax Volatility Advisers first reported a position in BRK.B in Q2 2013 and has held it in 38 quarters since. The position peaked at $91.5M in Q4 2023. 4,855 funds tracked by Wall St. Rank hold BRK.B as of Q1 2026.

Parallax Volatility Advisers held 33,311 shares of Berkshire Hathaway Class B worth $15.9M as of Q1 2026.
Parallax Volatility Advisers bought 30,261 Berkshire Hathaway Class B shares in Q1 2026, an estimated $14.9M.
Berkshire Hathaway Class B made up 0.04% of Parallax Volatility Advisers's portfolio in Q1 2026, its #301 holding.
Parallax Volatility Advisers first reported a position in Berkshire Hathaway Class B in Q2 2013 and has held it in 38 quarters since.
Parallax Volatility Advisers's Berkshire Hathaway Class B position peaked at $91.5M in Q4 2023.
4,855 funds tracked by Wall St. Rank held Berkshire Hathaway Class B as of Q1 2026.

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