PACIFIC BIOSCIENCES OF CALIF (PACB) Institutional Shareholders
PACIFIC BIOSCIENCES OF CALIF (PACB) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $247.26M in PACB holdings during the latest filing period.
ARK Invest is currently the largest disclosed institutional shareholder of PACB tracked by InsiderSet, reporting ownership valued at approximately $47.88M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $51.51M, representing an estimated gain of +7.58% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 70% of the total disclosed PACB value among the investors covered in this analysis. Major shareholders include ARK Invest, Blackrock, Inc., Softbank Group Corp., and several other long-term asset managers with concentrated positions in PACIFIC BIOSCIENCES OF CALIF (PACB).
This page ranks the largest institutional PACB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
219
Total Reported Value
$247.26M
Largest Holder
ARK Invest
Largest Position
$47.88M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
130
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| ARK Invest | Cathie Wood | 0.37% | 36,273,288 | $47,880,740 | $51,508,069 | +$3,627,329 | +7.58% |
| Blackrock, Inc. | 0.00% | 25,267,429 | $33,353,006 | $35,879,749 | +$2,526,743 | +7.58% | |
| Softbank Group Corp. | 0.24% | 20,451,570 | $26,996,072 | $29,041,229 | +$2,045,157 | +7.58% | |
| Vanguard Capital Management Llc | 0.00% | 12,777,449 | $16,866,233 | $18,143,978 | +$1,277,745 | +7.58% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.01% | 6,009,715 | $10,096,321 | $8,533,795 | -$1,562,526 | -15.48% | |
| Amova Asset Management Americas, Inc. | 0.13% | 7,037,987 | $9,219,763 | $9,993,942 | +$774,179 | +8.40% | |
| Geode Capital Management, Llc | 0.00% | 6,975,266 | $9,209,906 | $9,904,878 | +$694,972 | +7.55% | |
| State Street Corp | 0.00% | 6,121,716 | $8,080,665 | $8,692,837 | +$612,172 | +7.58% | |
| Millennium Management Llc | 0.00% | 4,892,318 | $6,457,860 | $6,947,092 | +$489,232 | +7.58% | |
| D. E. Shaw & Co., Inc. | 0.00% | 3,637,547 | $4,801,562 | $5,165,317 | +$363,755 | +7.58% | |
| Two Sigma Investments, Lp | 0.00% | 3,509,613 | $4,632,689 | $4,983,650 | +$350,961 | +7.58% | |
| Nuveen, Llc | 0.00% | 2,950,929 | $3,895,226 | $4,190,319 | +$295,093 | +7.58% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,868,393 | $3,786,279 | $4,073,118 | +$286,839 | +7.58% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 2,489,100 | $3,285,612 | $3,534,522 | +$248,910 | +7.58% |
| Charles Schwab Investment Management Inc | 0.00% | 2,405,496 | $3,175,255 | $3,415,804 | +$240,549 | +7.58% | |
| Iq Eq Fund Management (Ireland) Ltd | 0.18% | 1,694,546 | $2,846,837 | $2,406,255 | -$440,582 | -15.48% | |
| Northern Trust Corp | 0.00% | 2,130,788 | $2,812,640 | $3,025,719 | +$213,079 | +7.58% | |
| Vanguard Fiduciary Trust Co | 0.00% | 1,986,483 | $2,622,158 | $2,820,806 | +$198,648 | +7.58% | |
| Morgan Stanley | 0.00% | 1,840,461 | $2,429,409 | $2,613,455 | +$184,046 | +7.58% | |
| Susquehanna International Group, Llp | 0.00% | 1,719,165 | $2,269,298 | $2,441,214 | +$171,916 | +7.58% | |
| Bank Of America Corp | 0.00% | 1,666,706 | $2,200,052 | $2,366,723 | +$166,671 | +7.58% | |
| Ubs Group Ag | 0.00% | 1,640,099 | $2,164,931 | $2,328,941 | +$164,010 | +7.58% | |
| Citadel Advisors Llc | 0.00% | 1,576,051 | $2,080,387 | $2,237,992 | +$157,605 | +7.58% | |
| Birchview Capital, Lp | 1.13% | 1,500,000 | $1,980,000 | $2,130,000 | +$150,000 | +7.58% | |
| Invesco Ltd. | 0.00% | 1,468,148 | $1,937,955 | $2,084,770 | +$146,815 | +7.58% | |
| Jane Street Group, Llc | 0.00% | 1,390,070 | $1,834,892 | $1,973,899 | +$139,007 | +7.58% | |
| Bourne Lent Asset Management Inc | 0.55% | 943,055 | $1,584,332 | $1,339,138 | -$245,194 | -15.48% | |
| Qube Research & Technologies Ltd | 0.00% | 1,184,975 | $1,564,167 | $1,682,665 | +$118,498 | +7.58% | |
| Goldman Sachs Group Inc | 0.00% | 988,467 | $1,304,776 | $1,403,623 | +$98,847 | +7.58% | |
| Hhlr Advisors, Ltd. | 0.07% | 918,892 | $1,212,937 | $1,304,827 | +$91,890 | +7.58% | |
| Dimensional Fund Advisors Lp | 0.00% | 899,550 | $1,186,566 | $1,277,361 | +$90,795 | +7.65% | |
| Bank Of New York Mellon Corp | 0.00% | 813,406 | $1,073,697 | $1,155,037 | +$81,340 | +7.58% | |
| Universal- Beteiligungs- Und Servicegesellschaft Mbh | 0.00% | 808,700 | $1,067,484 | $1,148,354 | +$80,870 | +7.58% | |
| Aqr Capital Management Llc | 0.00% | 759,492 | $1,002,530 | $1,078,479 | +$75,949 | +7.58% | |
| Casdin Capital, Llc | 0.07% | 723,767 | $955,372 | $1,027,749 | +$72,377 | +7.58% | |
| Tudor Investment Corp Et Al | 0.00% | 684,707 | $903,813 | $972,284 | +$68,471 | +7.58% | |
| Peak6 Llc | 0.02% | 599,022 | $790,709 | $850,611 | +$59,902 | +7.58% | |
| Carret Asset Management, Llc | 0.07% | 559,140 | $738,065 | $793,979 | +$55,914 | +7.58% | |
| Vestmark Advisory Solutions, Inc. | 0.01% | 550,089 | $726,117 | $781,126 | +$55,009 | +7.58% | |
| Alliancebernstein L.P. | 0.00% | 387,060 | $723,802 | $549,625 | -$174,177 | -24.06% | |
| Panagora Asset Management Inc | 0.00% | 502,663 | $663,515 | $713,781 | +$50,266 | +7.58% | |
| Russell Investments Group, Ltd. | 0.00% | 469,875 | $620,233 | $667,223 | +$46,990 | +7.58% | |
| Arrowmark Colorado Holdings Llc | 0.02% | 468,382 | $618,264 | $665,102 | +$46,838 | +7.58% | |
| Mirador Capital Partners Lp | 0.07% | 342,482 | $575,370 | $486,324 | -$89,046 | -15.48% | |
| Group One Trading Llc | 0.02% | 365,021 | $481,828 | $518,330 | +$36,502 | +7.58% | |
| Caxton Associates Llp | 0.01% | 353,130 | $466,132 | $501,445 | +$35,313 | +7.58% | |
| Rhumbline Advisers | 0.00% | 348,942 | $460,594 | $495,498 | +$34,904 | +7.58% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.00% | 336,257 | $443,859 | $477,485 | +$33,626 | +7.58% | |
| Creative Planning | 0.00% | 327,360 | $432,115 | $464,851 | +$32,736 | +7.58% | |
| Lpl Financial Llc | 0.00% | 299,597 | $395,467 | $425,428 | +$29,961 | +7.58% |
Frequently asked questions about PACB
Who owns the most PACB stock?
The largest holders of PACB are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for PACIFIC BIOSCIENCES OF CALIF (PACB).
Is PACB widely held by superinvestors?
Many widely followed stocks like PACB appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly PACB is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.