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 $320.29M in PACB holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of PACB tracked by InsiderSet, reporting ownership valued at approximately $54.33M in its June 30, 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 $44.63M, representing an estimated loss of -17.86% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 68% of the total disclosed PACB value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., ARK Invest, 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
213
Total Reported Value
$320.29M
Largest Holder
Blackrock, Inc.
Largest Position
$54.33M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
60
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 32,339,550 | $54,330,444 | $44,628,579 | -$9,701,865 | -17.86% | |
| ARK Invest | Cathie Wood | 0.32% | 29,781,416 | $50,032,778 | $41,098,354 | -$8,934,424 | -17.86% |
| Softbank Group Corp. | 0.19% | 20,451,570 | $34,358,638 | $28,223,167 | -$6,135,471 | -17.86% | |
| Vanguard Capital Management Llc | 0.00% | 13,397,934 | $22,508,529 | $18,489,149 | -$4,019,380 | -17.86% | |
| Geode Capital Management, Llc | 0.00% | 7,606,518 | $12,782,429 | $10,496,995 | -$2,285,434 | -17.88% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.01% | 6,009,715 | $10,096,321 | $8,293,407 | -$1,802,914 | -17.86% | |
| Amova Asset Management Americas, Inc. | 0.13% | 6,009,715 | $10,036,224 | $8,293,407 | -$1,742,817 | -17.37% | |
| State Street Corp | 0.00% | 5,961,175 | $10,014,774 | $8,226,421 | -$1,788,353 | -17.86% | |
| Point72 Asset Management, L.P. | 0.01% | 4,787,300 | $8,042,664 | $6,606,474 | -$1,436,190 | -17.86% | |
| Two Sigma Investments, Lp | 0.01% | 4,242,599 | $7,127,566 | $5,854,787 | -$1,272,779 | -17.86% | |
| D. E. Shaw & Co., Inc. | 0.00% | 4,208,146 | $7,069,686 | $5,807,241 | -$1,262,445 | -17.86% | |
| Millennium Management Llc | 0.00% | 3,962,442 | $6,656,903 | $5,468,170 | -$1,188,733 | -17.86% | |
| Goldman Sachs Group Inc | 0.00% | 3,229,887 | $5,426,210 | $4,457,244 | -$968,966 | -17.86% | |
| Citadel Advisors Llc | 0.00% | 2,845,903 | $4,781,117 | $3,927,346 | -$853,771 | -17.86% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,671,916 | $4,488,819 | $3,687,244 | -$801,575 | -17.86% | |
| Charles Schwab Investment Management Inc | 0.00% | 2,652,298 | $4,455,861 | $3,660,171 | -$795,690 | -17.86% | |
| Northern Trust Corp | 0.00% | 2,352,786 | $3,952,681 | $3,246,845 | -$705,836 | -17.86% | |
| Vanguard Fiduciary Trust Co | 0.00% | 2,187,627 | $3,675,213 | $3,018,925 | -$656,288 | -17.86% | |
| Susquehanna International Group, Llp | 0.00% | 2,129,263 | $3,577,162 | $2,938,383 | -$638,779 | -17.86% | |
| Longaeva Partners L.P. | 0.10% | 2,118,231 | $3,558,628 | $2,923,159 | -$635,469 | -17.86% | |
| Iq Eq Fund Management (Ireland) Ltd | 0.18% | 1,694,546 | $2,846,837 | $2,338,473 | -$508,364 | -17.86% | |
| Birchview Capital, Lp | 1.06% | 1,350,000 | $2,268,000 | $1,863,000 | -$405,000 | -17.86% | |
| Bank Of America Corp | 0.00% | 1,348,131 | $2,264,860 | $1,860,421 | -$404,439 | -17.86% | |
| Invesco Ltd. | 0.00% | 1,297,091 | $2,179,114 | $1,789,986 | -$389,128 | -17.86% | |
| Aqr Capital Management Llc | 0.00% | 1,296,684 | $2,178,430 | $1,789,424 | -$389,006 | -17.86% | |
| Nuveen, Llc | 0.00% | 1,023,113 | $1,718,830 | $1,411,896 | -$306,934 | -17.86% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 966,200 | $1,623,216 | $1,333,356 | -$289,860 | -17.86% |
| Bourne Lent Asset Management Inc | 0.55% | 943,055 | $1,584,332 | $1,301,416 | -$282,916 | -17.86% | |
| Hhlr Advisors, Ltd. | 0.19% | 918,892 | $1,543,739 | $1,268,071 | -$275,668 | -17.86% | |
| Ubs Group Ag | 0.00% | 893,140 | $1,500,475 | $1,232,533 | -$267,942 | -17.86% | |
| Universal- Beteiligungs- Und Servicegesellschaft Mbh | 0.00% | 808,700 | $1,358,616 | $1,116,006 | -$242,610 | -17.86% | |
| Acadian Asset Management Llc | 0.00% | 793,332 | $1,328,000 | $1,094,798 | -$233,202 | -17.56% | |
| Bank Of New York Mellon Corp | 0.00% | 767,567 | $1,289,512 | $1,059,242 | -$230,270 | -17.86% | |
| Dimensional Fund Advisors Lp | 0.00% | 759,783 | $1,277,135 | $1,048,501 | -$228,634 | -17.90% | |
| Casdin Capital, Llc | 0.06% | 723,767 | $1,215,929 | $998,798 | -$217,131 | -17.86% | |
| Tudor Investment Corp Et Al | 0.00% | 684,707 | $1,150,308 | $944,896 | -$205,412 | -17.86% | |
| Xtx Topco Ltd | 0.01% | 638,882 | $1,073,322 | $881,657 | -$191,665 | -17.86% | |
| Numerai Gp Llc | 0.09% | 621,469 | $1,044,068 | $857,627 | -$186,441 | -17.86% | |
| Carret Asset Management, Llc | 0.09% | 600,140 | $1,008,235 | $828,193 | -$180,042 | -17.86% | |
| Man Group Plc | 0.00% | 597,334 | $1,003,521 | $824,321 | -$179,200 | -17.86% | |
| Russell Investments Group, Ltd. | 0.00% | 596,843 | $1,002,694 | $823,643 | -$179,051 | -17.86% | |
| Balyasny Asset Management L.P. | 0.00% | 564,339 | $948,090 | $778,788 | -$169,302 | -17.86% | |
| Peak6 Llc | 0.02% | 555,552 | $933,327 | $766,662 | -$166,665 | -17.86% | |
| Vestmark Advisory Solutions, Inc. | 0.01% | 478,205 | $803,384 | $659,923 | -$143,461 | -17.86% | |
| Morgan Stanley | 0.00% | 477,776 | $802,664 | $659,331 | -$143,333 | -17.86% | |
| Arrowmark Colorado Holdings Llc | 0.03% | 468,382 | $786,882 | $646,367 | -$140,515 | -17.86% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.00% | 441,639 | $741,954 | $609,462 | -$132,492 | -17.86% | |
| Rhumbline Advisers | 0.00% | 356,996 | $599,738 | $492,654 | -$107,084 | -17.86% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 348,324 | $585,185 | $480,687 | -$104,498 | -17.86% | |
| Mirador Capital Partners Lp | 0.07% | 342,482 | $575,370 | $472,625 | -$102,745 | -17.86% |
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.