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Equibles

PACB

Pacific Biosciences Of California, Inc.

Company with tickers: PACB

CIK
1299130
CUSIP
69404D108
Shares Outstanding
310,601,688
13F Activity (30d)
18 filings 9 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 229
Total Value: $246,215,005
Total Shares: 186,526,614
Showing 1–100 of 236 holdings by value · page 1 of 3

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 229 13F filers · Δ vs Dec 31, 2025
Top Holder
19.4%
Jun 2023 → Mar 2026 · range 10.4% – 19.4%
+1.2 pts
Top 5
54.6%
Jun 2023 → Mar 2026 · range 39.2% – 56.0%
+2.7 pts
Top 10
69.9%
Jun 2023 → Mar 2026 · range 56.5% – 78.2%
+3.6 pts
HHI
817
Jun 2023 → Mar 2026 · range 434 – 817
Broadly held+89

Quarterly Activity

vs Dec 31, 2025
New
49
Increased
60
Decreased
73
Sold Out
39
Unchanged
47
Holder count: +10
Institutional value: -45.5%
Shares held: -22.7%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega Nuveen, LLC +2,102,710 2,950,929
Mega BlackRock, Inc. +1,922,459 25,267,429
Small Birchview Capital, LP +1,000,000 1,500,000
Mega AQR CAPITAL MANAGEMENT LLC +672,528 759,492
Mega TWO SIGMA INVESTMENTS, LP +632,429 3,509,613

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large ARK Investment Management LLC −38,255,168 36,273,288
Mid Casdin Capital, LLC −3,500,000 723,767
Large Point72 Asset Management, L.P. −2,671,700 285,700
Mega CITADEL ADVISORS LLC −1,830,990 1,825,451
Mega UBS Group AG −1,531,447 1,640,099

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 12,777,449 $16,866,232
Mega VANGUARD FIDUCIARY TRUST CO 1,986,483 $2,622,157
Large Qube Research & Technologies Ltd 1,184,975 $1,564,167
Large TUDOR INVESTMENT CORP ET AL 684,707 $903,813
Large PANAGORA ASSET MANAGEMENT INC 502,663 $663,515

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 17,037,314 $31,859,776
Small AMIRAL GESTION 2,733,290 $5,111,252
Small Koss-Olinger Consulting, LLC 2,600,000 $4,862,000
Large TWO SIGMA ADVISERS, LP 827,500 $1,547,425
Small Headlands Technologies LLC 733,840 $1,372,280
Filter: New 49 Increased 60 Reduced 73 Sold out 39 Unchanged 47
Showing 100 of 236
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Large ARK Investment Management LLC $47,880,740 19.45% 36,273,288
Mega BlackRock, Inc. $33,353,003 13.55% 25,267,429
Large SOFTBANK GROUP CORP. Bank $26,996,072 10.96% 20,451,570
Mega VANGUARD CAPITAL MANAGEMENT LLC $16,866,232 6.85% 12,777,449
Mega Sumitomo Mitsui Trust Group, Inc. $9,290,142 3.77% 7,037,987
Mid Amova Asset Management Americas, Inc. $9,290,142 3.77% 7,037,987
Mega GEODE CAPITAL MANAGEMENT, LLC $9,207,350 3.74% 6,975,266
Mega STATE STREET CORP $8,080,665 3.28% 6,121,716
Mega MILLENNIUM MANAGEMENT LLC $6,457,859 2.62% 4,892,318
Mega D. E. Shaw & Co., Inc. $4,801,561 1.95% 3,637,547
Mega TWO SIGMA INVESTMENTS, LP $4,632,689 1.88% 3,509,613
Mega Nuveen, LLC $3,895,225 1.58% 2,950,929
Large RENAISSANCE TECHNOLOGIES LLC $3,285,612 1.33% 2,489,100
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $3,175,254 1.29% 2,405,496
Mega NORTHERN TRUST CORP Bank $2,812,640 1.14% 2,130,788
Mega VANGUARD FIDUCIARY TRUST CO Bank $2,622,157 1.06% 1,986,483
Mega MORGAN STANLEY $2,429,405 0.99% 1,840,461
Mid IQ EQ FUND MANAGEMENT (IRELAND) Ltd $2,360,678 0.96% 1,788,393
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $2,269,297 0.92% 1,719,165
Mega BANK OF AMERICA CORP /DE/ Bank $2,200,050 0.89% 1,666,706
Mega UBS Group AG $2,164,929 0.88% 1,640,099
Mega CITADEL ADVISORS LLC $2,080,387 0.84% 1,576,051
Small Birchview Capital, LP $1,980,000 0.80% 1,500,000
Mega Invesco Ltd. $1,937,953 0.79% 1,468,148
Mega JANE STREET GROUP, LLC $1,834,892 0.75% 1,390,070
Large HRT FINANCIAL LP $1,670,506 0.68% 1,265,535
Large Qube Research & Technologies Ltd $1,564,167 0.64% 1,184,975
Mega GOLDMAN SACHS GROUP INC $1,304,775 0.53% 988,467
Small BOURNE LENT ASSET MANAGEMENT INC $1,255,392 0.51% 951,055
Mid HHLR ADVISORS, LTD. $1,212,937 0.49% 918,892
Mega DIMENSIONAL FUND ADVISORS LP $1,187,404 0.48% 899,550
Mega Bank of New York Mellon Corp Bank $1,073,695 0.44% 813,406
Large Universal- Beteiligungs- und Servicegesellschaft mbH $1,067,484 0.43% 808,700
Mega AQR CAPITAL MANAGEMENT LLC $1,002,527 0.41% 759,492
Mid Casdin Capital, LLC $955,372 0.39% 723,767
Large TUDOR INVESTMENT CORP ET AL $903,813 0.37% 684,707
Small Mirador Capital Partners LP $798,446 0.32% 604,884
Large PEAK6 LLC $790,709 0.32% 599,022
Small CARRET ASSET MANAGEMENT, LLC $738,064 0.30% 559,140
Mid Vestmark Advisory Solutions, Inc. $726,117 0.29% 550,089
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $714,120 0.29% 541,000
Large PANAGORA ASSET MANAGEMENT INC $663,515 0.27% 502,663
Large Russell Investments Group, Ltd. $620,232 0.25% 469,875
Mid ArrowMark Colorado Holdings LLC $618,264 0.25% 468,382
Large ACADIAN ASSET MANAGEMENT LLC $552,804 0.22% 418,791
Mega ALLIANCEBERNSTEIN L.P. $510,919 0.21% 387,060
Mid GROUP ONE TRADING LLC $481,827 0.20% 365,021
Mid CAXTON ASSOCIATES LLP $466,131 0.19% 353,130
Mega RHUMBLINE ADVISERS $460,603 0.19% 348,942
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $443,859 0.18% 336,257
Large Creative Planning $432,115 0.18% 327,360
Mega LPL Financial LLC $395,468 0.16% 299,597
Large Point72 Asset Management, L.P. $377,124 0.15% 285,700
Mid HIMENSION CAPITAL (SINGAPORE) PTE. LTD. $365,022 0.15% 276,532
Small WATER ISLAND CAPITAL LLC $359,092 0.15% 272,040
Large Balyasny Asset Management L.P. $343,910 0.14% 260,538
Mega HSBC HOLDINGS PLC $327,989 0.13% 248,477
Mega DEUTSCHE BANK AG\ Bank $323,095 0.13% 244,769
Mid XTX Topco Ltd $323,088 0.13% 244,764
Mega JENNISON ASSOCIATES LLC $303,328 0.12% 229,794
Mega BARCLAYS PLC $293,496 0.12% 222,347
Mega CITADEL ADVISORS LLC $258,060 0.10% 195,500
Mega PRICE T ROWE ASSOCIATES INC /MD/ $248,216 0.10% 188,043
Small Green Alpha Advisors, LLC $241,055 0.10% 182,618
Mega JANE STREET GROUP, LLC $235,620 0.10% 178,500
Large SEI INVESTMENTS CO $220,206 0.09% 166,823
Mega RAYMOND JAMES FINANCIAL INC $217,216 0.09% 164,558
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $212,256 0.09% 160,800
Mid Main Street Research LLC $200,772 0.08% 152,100
Mega ENVESTNET ASSET MANAGEMENT INC $196,628 0.08% 148,961
Small AdvisorNet Financial, Inc $187,515 0.08% 142,057
Mega JPMORGAN CHASE & CO $182,823 0.07% 138,504
Mid GSA CAPITAL PARTNERS LLP $181,278 0.07% 137,332
Large FARALLON CAPITAL MANAGEMENT LLC $178,200 0.07% 135,000
Mega WELLS FARGO & COMPANY/MN $173,201 0.07% 131,214
Large MetLife Investment Management, LLC $167,758 0.07% 127,090
Mega Vanguard Global Advisers, LLC $160,750 0.07% 121,781
Small Koa Wealth Management, LLC $158,400 0.06% 120,000
Mid BENJAMIN EDWARDS INC $152,524 0.06% 115,549
Large IEQ CAPITAL, LLC $148,761 0.06% 112,698
Mid Quadrature Capital Ltd $148,503 0.06% 112,503
Mid SIMPLEX TRADING, LLC $143,901 0.06% 109,016
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $142,296 0.06% 107,800
Mid INTECH INVESTMENT MANAGEMENT LLC $133,809 0.05% 101,371
Large GABELLI FUNDS LLC $132,000 0.05% 100,000
Small KAVAR CAPITAL PARTNERS GROUP, LLC $123,181 0.05% 93,319
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $111,969 0.05% 84,825
Large MARSHALL WACE, LLP $107,316 0.04% 81,300
Large Police & Firemen's Retirement System of New Jersey Pension $105,540 0.04% 79,955
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $98,794 0.04% 74,844
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension $94,962 0.04% 71,941
Large STIFEL FINANCIAL CORP $92,433 0.04% 70,026
Small HARTLINE INVESTMENT CORP/ $91,080 0.04% 69,000
Mid HUB Investment Partners, LLC $88,440 0.04% 67,000
Mega BNP PARIBAS ARBITRAGE, SA $86,325 0.04% 65,398
Small State of Wyoming $73,298 0.03% 55,529
Mega CITADEL ADVISORS LLC $71,148 0.03% 53,900
Large CWM, LLC $71,008 0.03% 53,794
Mid China Universal Asset Management Co., Ltd. $70,741 0.03% 53,592
Large ProShare Advisors LLC $70,666 0.03% 53,535

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