Marshall Wace
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Marshall Wace’s Pacific Biosciences PACB Stock Holding History

Marshall Wace’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
Q1 		$107K Buy
+81,300
New +$145K ﹤0.01% 2886
2025
Q1 		– Sell
-50,900
Closed -$93.1K – 2971
2024
Q4 		$93.1K Sell
50,900
-2,071,020
-98% -$4.04M ﹤0.01% 2449
2024
Q3 		$3.61M Buy
2,121,920
+510,620
+32% +$839K ﹤0.01% 1124
2024
Q2 		$2.21M Buy
1,611,300
+1,117,966
+227% +$2.26M ﹤0.01% 1315
2024
Q1 		$1.85M Buy
493,334
+349,246
+242% +$2.04M ﹤0.01% 1400
2023
Q4 		$1.41M Sell
144,088
-344,380
-71% -$2.82M ﹤0.01% 1360
2023
Q3 		$4.08M Buy
+488,468
New +$5.58M 0.01% 948
2023
Q2 		– Sell
-11,500
Closed -$133K – 2840
2023
Q1 		$133K Sell
11,500
-63,600
-85% -$632K ﹤0.01% 2461
2022
Q4 		$614K Sell
75,100
-14,500
-16% -$125K ﹤0.01% 2298
2022
Q3 		$520K Buy
+89,600
New +$514K ﹤0.01% 2710
2020
Q4 		– Sell
-146,005
Closed -$1.44M – 2099
2020
Q3 		$1.44M Sell
146,005
-2,256
-2% -$13K 0.01% 897
2020
Q2 		$512K Sell
148,261
-38,356
-21% -$131K ﹤0.01% 1193
2020
Q1 		$571K Sell
186,617
-101,027
-35% -$414K 0.01% 948
2019
Q4 		$1.48M Sell
287,644
-380,493
-57% -$1.93M 0.01% 891
2019
Q3 		$3.45M Buy
668,137
+396,180
+146% +$2.22M 0.03% 604
2019
Q2 		$1.65M Sell
271,957
-685,257
-72% -$4.81M 0.01% 822
2019
Q1 		$6.92M Buy
957,214
+337,213
+54% +$2.44M 0.07% 366
2018
Q4 		$4.59M Buy
+620,001
New +$3.93M 0.05% 466

Other funds holding PACB

AIM
ARK Investment Management St. Petersburg, Florida $12.9B AUM 64.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
SoftBank Group
SoftBank Group Tokyo, Japan $11.4B AUM 27.91% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $154B AUM 29.96% 1-Year Est. Return
NAMA
Nikko Asset Management Americas New York $7.07B AUM 50.91% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

Marshall Wace's PACB Position: Q1 2026 in Review

Marshall Wace opened a new position in Pacific Biosciences (PACB) in Q1 2026: 81,300 shares worth $107K. The stake represents ﹤0.01% of the portfolio and ranks #2886 among its holdings. This is a return to the name: Marshall Wace previously reported a position in PACB as recently as Q4 2024.

Marshall Wace first reported a position in PACB in Q4 2018 and has held it in 18 quarters since. The position peaked at $6.92M in Q1 2019. 229 funds tracked by Wall St. Rank hold PACB as of Q1 2026.

  • Marshall Wace held 81,300 shares of Pacific Biosciences worth $107K as of Q1 2026.
  • Pacific Biosciences was a new Marshall Wace position in Q1 2026.
  • Pacific Biosciences made up ﹤0.01% of Marshall Wace's portfolio in Q1 2026, its #2886 holding.
  • Marshall Wace first reported a position in Pacific Biosciences in Q4 2018 and has held it in 18 quarters since.
  • Marshall Wace's Pacific Biosciences position peaked at $6.92M in Q1 2019.
  • 229 funds tracked by Wall St. Rank held Pacific Biosciences as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.