PACB Institutional Ownership & Shareholders
PACIFIC BIOSCIENCES OF CALIF (PACB) is currently held by 211 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $324.12M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
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 $84.24M, representing an estimated gain of +55.06% 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
211
Total Reported Value
$324.12M
Largest Holder
Blackrock, Inc.
Largest Position
$54.33M
Insider Transactions (90d)
4
Latest Filing Quarter
Q2 2026
New Institutional Positions
59
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 | $84,244,528 | +$29,914,084 | +55.06% | |
| ARK Invest | Cathie Wood | 0.32% | 29,781,416 | $50,032,778 | $77,580,589 | +$27,547,811 | +55.06% |
| Softbank Group Corp. | 0.19% | 20,451,570 | $34,358,638 | $53,276,340 | +$18,917,702 | +55.06% | |
| Vanguard Capital Management Llc | 0.00% | 13,397,934 | $22,508,529 | $34,901,618 | +$12,393,089 | +55.06% | |
| Geode Capital Management, Llc | 0.00% | 7,606,518 | $12,782,429 | $19,814,979 | +$7,032,550 | +55.02% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.01% | 4,955,567 | $11,744,694 | $12,909,252 | +$1,164,558 | +9.92% | |
| Amova Asset Management Americas, Inc. | 0.13% | 6,009,715 | $10,036,224 | $15,655,308 | +$5,619,084 | +55.99% | |
| State Street Corp | 0.00% | 5,961,175 | $10,014,774 | $15,528,861 | +$5,514,087 | +55.06% | |
| Point72 Asset Management, L.P. | 0.01% | 4,787,300 | $8,042,664 | $12,470,917 | +$4,428,253 | +55.06% | |
| Two Sigma Investments, Lp | 0.01% | 4,242,599 | $7,127,566 | $11,051,970 | +$3,924,404 | +55.06% | |
| D. E. Shaw & Co., Inc. | 0.00% | 4,208,146 | $7,069,686 | $10,962,220 | +$3,892,534 | +55.06% | |
| Millennium Management Llc | 0.00% | 3,962,442 | $6,656,903 | $10,322,161 | +$3,665,258 | +55.06% | |
| Goldman Sachs Group Inc | 0.00% | 3,229,887 | $5,426,210 | $8,413,856 | +$2,987,646 | +55.06% | |
| Citadel Advisors Llc | 0.00% | 2,845,903 | $4,781,117 | $7,413,577 | +$2,632,460 | +55.06% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,671,916 | $4,488,819 | $6,960,341 | +$2,471,522 | +55.06% | |
| Charles Schwab Investment Management Inc | 0.00% | 2,652,298 | $4,455,861 | $6,909,236 | +$2,453,375 | +55.06% | |
| Northern Trust Corp | 0.00% | 2,352,786 | $3,952,681 | $6,129,008 | +$2,176,327 | +55.06% | |
| Vanguard Fiduciary Trust Co | 0.00% | 2,187,627 | $3,675,213 | $5,698,768 | +$2,023,555 | +55.06% | |
| Susquehanna International Group, Llp | 0.00% | 2,129,263 | $3,577,162 | $5,546,730 | +$1,969,568 | +55.06% | |
| Longaeva Partners L.P. | 0.10% | 2,118,231 | $3,558,628 | $5,517,992 | +$1,959,364 | +55.06% | |
| Iq Eq Fund Management (Ireland) Ltd | 0.18% | 1,694,546 | $2,846,837 | $4,414,292 | +$1,567,455 | +55.06% | |
| Birchview Capital, Lp | 1.06% | 1,350,000 | $2,268,000 | $3,516,750 | +$1,248,750 | +55.06% | |
| Bank Of America Corp | 0.00% | 1,348,131 | $2,264,860 | $3,511,881 | +$1,247,021 | +55.06% | |
| Invesco Ltd. | 0.00% | 1,297,091 | $2,179,114 | $3,378,922 | +$1,199,808 | +55.06% | |
| Aqr Capital Management Llc | 0.00% | 1,296,684 | $2,178,430 | $3,377,862 | +$1,199,432 | +55.06% | |
| Nuveen, Llc | 0.00% | 1,023,113 | $1,718,830 | $2,665,209 | +$946,379 | +55.06% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 966,200 | $1,623,216 | $2,516,951 | +$893,735 | +55.06% |
| Bourne Lent Asset Management Inc | 0.55% | 943,055 | $1,584,332 | $2,456,658 | +$872,326 | +55.06% | |
| Hhlr Advisors, Ltd. | 0.19% | 918,892 | $1,543,739 | $2,393,714 | +$849,975 | +55.06% | |
| Ubs Group Ag | 0.00% | 893,140 | $1,500,475 | $2,326,630 | +$826,155 | +55.06% | |
| Universal- Beteiligungs- Und Servicegesellschaft Mbh | 0.00% | 808,700 | $1,358,616 | $2,106,664 | +$748,048 | +55.06% | |
| Acadian Asset Management Llc | 0.00% | 793,332 | $1,328,000 | $2,066,630 | +$738,630 | +55.62% | |
| Mackenzie Financial Corp | 0.00% | 545,513 | $1,292,866 | $1,421,061 | +$128,195 | +9.92% | |
| Bank Of New York Mellon Corp | 0.00% | 767,567 | $1,289,512 | $1,999,512 | +$710,000 | +55.06% | |
| Dimensional Fund Advisors Lp | 0.00% | 759,783 | $1,277,135 | $1,979,235 | +$702,100 | +54.97% | |
| Casdin Capital, Llc | 0.06% | 723,767 | $1,215,929 | $1,885,413 | +$669,484 | +55.06% | |
| Tudor Investment Corp Et Al | 0.00% | 684,707 | $1,150,308 | $1,783,662 | +$633,354 | +55.06% | |
| Xtx Topco Ltd | 0.01% | 638,882 | $1,073,322 | $1,664,288 | +$590,966 | +55.06% | |
| Numerai Gp Llc | 0.09% | 621,469 | $1,044,068 | $1,618,927 | +$574,859 | +55.06% | |
| Carret Asset Management, Llc | 0.09% | 600,140 | $1,008,235 | $1,563,365 | +$555,130 | +55.06% | |
| Man Group Plc | 0.00% | 597,334 | $1,003,521 | $1,556,055 | +$552,534 | +55.06% | |
| Russell Investments Group, Ltd. | 0.00% | 596,843 | $1,002,694 | $1,554,776 | +$552,082 | +55.06% | |
| Balyasny Asset Management L.P. | 0.00% | 564,339 | $948,090 | $1,470,103 | +$522,013 | +55.06% | |
| Peak6 Llc | 0.02% | 555,552 | $933,327 | $1,447,213 | +$513,886 | +55.06% | |
| Mirador Capital Partners Lp | 0.09% | 341,725 | $809,888 | $890,194 | +$80,306 | +9.92% | |
| Vestmark Advisory Solutions, Inc. | 0.01% | 478,205 | $803,384 | $1,245,724 | +$442,340 | +55.06% | |
| Morgan Stanley | 0.00% | 477,776 | $802,664 | $1,244,606 | +$441,942 | +55.06% | |
| Arrowmark Colorado Holdings Llc | 0.03% | 468,382 | $786,882 | $1,220,135 | +$433,253 | +55.06% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.00% | 441,639 | $741,954 | $1,150,470 | +$408,516 | +55.06% | |
| Rhumbline Advisers | 0.00% | 356,996 | $599,738 | $929,975 | +$330,237 | +55.06% |
Frequently asked questions about PACB
Who are the largest institutional holders of PACB?
The largest institutional holders of PACB reported in the latest SEC Form 13F filings include Blackrock, Inc., ARK Invest, Softbank Group Corp., Vanguard Capital Management Llc, and Geode Capital Management, Llc. InsiderSet ranks institutional holders by their latest reported PACB position.
What is PACB institutional ownership?
This page tracks PACB positions reported by institutional investment managers through SEC Form 13F. PACIFIC BIOSCIENCES OF CALIF (PACB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own PACB?
InsiderSet currently tracks 211 institutional managers reporting PACB holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of PACB shareholders.
How much PACB stock do institutions own?
Institutional investment managers disclosed approximately $324.12M in PACB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was PACB institutional ownership last updated?
The latest PACB institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional PACB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its PACB position after the reporting date.
Are institutions buying or selling PACB?
Institutional buying and selling can be analyzed by comparing PACB positions across consecutive 13F reporting periods. InsiderSet's PACB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View PACB ownership changes.
How has PACB institutional ownership changed over time?
InsiderSet tracks PACB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.