XTX Topco’s Pacific Biosciences PACB Stock Holding History

XTX Topco’s Portfolio PACB Stock Details PACB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$1.07M	Buy	638,882 +394,118	+161%	+$573K	0.01%	1727
2026 Q1	$323K	Sell	244,764 -383,458	-61%	-$686K	0.01%	2423
2025 Q4	$1.17M	Buy	628,222 +615,907	+5,001%	+$1.18M	0.03%	910
2025 Q3	$15.8K	Sell	12,315 -942,281	-99%	-$1.28M	﹤0.01%	2368
2025 Q2	$1.18M	Buy	954,596 +466,359	+96%	+$539K	0.05%	570
2025 Q1	$576K	Buy	+488,237	New	+$749K	0.03%	923
2024 Q4	–	Sell	-56,861	Closed	-$96.7K	–	2766
2024 Q3	$96.7K	Buy	+56,861	New	+$93.4K	0.01%	1612
2024 Q1	–	Sell	-23,751	Closed	-$233K	–	2191
2023 Q4	$233K	Sell	23,751 -631	-3%	-$5.16K	0.05%	841
2023 Q3	$204K	Buy	+24,382	New	+$279K	0.03%	1011
2022 Q4	–	Sell	-31,526	Closed	-$183K	–	1410
2022 Q3	$183K	Sell	31,526 -9,435	-23%	-$54.1K	0.05%	811
2022 Q2	$181K	Buy	+40,961	New	+$249K	0.07%	493
2021 Q2	–	Sell	-8,031	Closed	-$268K	–	1019
2021 Q1	$268K	Buy	+8,031	New	+$281K	0.13%	334

Other funds holding PACB

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

AIM

ARK Investment Management St. Petersburg, Florida $15.4B AUM 50.29% 1-Year Est. Return

SoftBank Group Tokyo, Japan $18.2B AUM 177.65% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return

NAMA

Nikko Asset Management Americas New York $7.75B AUM 33.73% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Point72 Asset Management Stamford, Connecticut $90.7B AUM 77.13% 1-Year Est. Return

Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

XTX Topco's PACB Position: Q2 2026 in Review

XTX Topco increased its Pacific Biosciences (PACB) stake by 161% in Q2 2026, buying an estimated $573K and bringing the position to 638,882 shares worth $1.07M. The position accounts for 0.01% of the portfolio, ranked #1727.

XTX Topco first reported a position in PACB in Q1 2021 and has held it in 12 quarters since. The position peaked at $1.18M in Q2 2025. 223 funds tracked by Wall St. Rank hold PACB as of Q2 2026.

XTX Topco held 638,882 shares of Pacific Biosciences worth $1.07M as of Q2 2026.
XTX Topco bought 394,118 Pacific Biosciences shares in Q2 2026, an estimated $573K.
Pacific Biosciences made up 0.01% of XTX Topco's portfolio in Q2 2026, its #1727 holding.
XTX Topco first reported a position in Pacific Biosciences in Q1 2021 and has held it in 12 quarters since.
XTX Topco's Pacific Biosciences position peaked at $1.18M in Q2 2025.
223 funds tracked by Wall St. Rank held Pacific Biosciences as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.