Citadel Advisors’s Pacific Biosciences PACB Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$2.08M Sell
1,576,051
-1,590,190
-50% -$2.84M ﹤0.01% 5984
2025
Q4
$5.92M Buy
3,166,241
+667,887
+27% +$1.28M ﹤0.01% 4026
2025
Q3
$3.2M Buy
+2,498,354
New +$3.38M ﹤0.01% 5191
2025
Q2
Sell
-22
Closed -$25 14378
2025
Q1
$26 Sell
22
-360,959
-100% -$554K ﹤0.01% 14354
2024
Q4
$661K Buy
360,981
+360,959
+1,640,723% +$705K ﹤0.01% 7945
2024
Q3
$37 Sell
22
-904,179
-100% -$1.49M ﹤0.01% 14108
2024
Q2
$1.24M Sell
904,201
-578,114
-39% -$1.17M ﹤0.01% 6183
2024
Q1
$5.56M Buy
1,482,315
+937,811
+172% +$5.49M ﹤0.01% 3787
2023
Q4
$5.34M Sell
544,504
-2,600,173
-83% -$21.3M ﹤0.01% 3685
2023
Q3
$26.3M Sell
3,144,677
-776,626
-20% -$8.88M 0.01% 1608
2023
Q2
$52.2M Sell
3,921,303
-1,127,669
-22% -$13.7M 0.01% 1012
2023
Q1
$58.5M Buy
5,048,972
+472,312
+10% +$4.7M 0.01% 954
2022
Q4
$37.4M Sell
4,576,660
-358,452
-7% -$3.09M 0.01% 1361
2022
Q3
$28.6M Buy
4,935,112
+4,619,581
+1,464% +$26.5M 0.01% 1522
2022
Q2
$1.4M Sell
315,531
-1,932,718
-86% -$11.7M ﹤0.01% 6279
2022
Q1
$20.5M Buy
2,248,249
+1,893,895
+534% +$21.8M ﹤0.01% 1958
2021
Q4
$7.25M Sell
354,354
-50,549
-12% -$1.22M ﹤0.01% 3647
2021
Q3
$10.3M Buy
404,903
+138,246
+52% +$4.1M ﹤0.01% 3016
2021
Q2
$9.32M Sell
266,657
-94,484
-26% -$2.75M ﹤0.01% 3190
2021
Q1
$12M Buy
361,141
+329,583
+1,044% +$11.5M ﹤0.01% 2707
2020
Q4
$819K Sell
31,558
-273,698
-90% -$4.65M ﹤0.01% 7210
2020
Q3
$3.01M Buy
305,256
+133,603
+78% +$769K ﹤0.01% 3980
2020
Q2
$592K Buy
171,653
+59,755
+53% +$203K ﹤0.01% 6768
2020
Q1
$342K Buy
111,898
+80,548
+257% +$330K ﹤0.01% 7098
2019
Q4
$161K Buy
31,350
+12,499
+66% +$63.5K ﹤0.01% 8323
2019
Q3
$97K Sell
18,851
-4,398,454
-100% -$24.6M ﹤0.01% 8496
2019
Q2
$26.7M Buy
4,417,305
+1,770,640
+67% +$12.4M 0.01% 1161
2019
Q1
$19.1M Buy
2,646,665
+2,626,918
+13,303% +$19M 0.01% 1382
2018
Q4
$146K Sell
19,747
-33,846
-63% -$214K ﹤0.01% 8074
2018
Q3
$290K Sell
53,593
-597,075
-92% -$2.56M ﹤0.01% 7625
2018
Q2
$2.31M Buy
650,668
+179,221
+38% +$497K ﹤0.01% 3892
2018
Q1
$967K Buy
471,447
+352,475
+296% +$915K ﹤0.01% 4860
2017
Q4
$314K Buy
118,972
+100,242
+535% +$351K ﹤0.01% 6386
2017
Q3
$98K Sell
18,730
-33,291
-64% -$143K ﹤0.01% 7038
2017
Q2
$185K Sell
52,021
-74,325
-59% -$300K ﹤0.01% 6617
2017
Q1
$653K Sell
126,346
-9,687
-7% -$47.4K ﹤0.01% 4625
2016
Q4
$517K Sell
136,033
-1,797,947
-93% -$13.1M ﹤0.01% 4844
2016
Q3
$17.3M Buy
1,933,980
+1,423,093
+279% +$11.9M 0.02% 953
2016
Q2
$3.59M Buy
510,887
+277,278
+119% +$2.53M ﹤0.01% 2126
2016
Q1
$1.99M Buy
233,609
+33,973
+17% +$334K ﹤0.01% 2650
2015
Q4
$2.62M Buy
199,636
+155,890
+356% +$1.4M ﹤0.01% 2472
2015
Q3
$160K Buy
+43,746
New +$214K ﹤0.01% 6425
2015
Q1
Sell
-41,659
Closed -$327K 8758
2014
Q4
$327K Buy
41,659
+34,633
+493% +$222K ﹤0.01% 5308
2014
Q3
$34K Sell
7,026
-37,654
-84% -$197K ﹤0.01% 7138
2014
Q2
$276K Buy
+44,680
New +$224K ﹤0.01% 5164
2014
Q1
Sell
-24,884
Closed -$130K 7969
2013
Q4
$130K Buy
+24,884
New +$114K ﹤0.01% 5399

Other funds holding PACB

Citadel Advisors's PACB Position: Q1 2026 in Review

Citadel Advisors reduced its Pacific Biosciences (PACB) stake by 50% in Q1 2026, selling an estimated $2.84M and leaving 1,576,051 shares worth $2.08M. The position accounts for ﹤0.01% of the portfolio, ranked #5984.

Citadel Advisors first reported a position in PACB in Q4 2013 and has held it in 46 quarters since. The position peaked at $58.5M in Q1 2023. 229 funds tracked by Wall St. Rank hold PACB as of Q1 2026.

  • Citadel Advisors held 1,576,051 shares of Pacific Biosciences worth $2.08M as of Q1 2026.
  • Citadel Advisors sold 1,590,190 Pacific Biosciences shares in Q1 2026, an estimated $2.84M.
  • Pacific Biosciences made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #5984 holding.
  • Citadel Advisors first reported a position in Pacific Biosciences in Q4 2013 and has held it in 46 quarters since.
  • Citadel Advisors's Pacific Biosciences position peaked at $58.5M in Q1 2023.
  • 229 funds tracked by Wall St. Rank held Pacific Biosciences as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.