Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in PACB held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 32.3M | $54.3M | +28.0% | 10.412% | 0.00% |
| 2 | ARK Investment Management LLC | 29.8M | $50.0M | -17.9% | 9.588% | 0.32% |
| 3 | SOFTBANK GROUP CORP. | 20.5M | $34.4M | 0.0% | 6.585% | 0.19% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 13.4M | $22.5M | +4.9% | 4.314% | 0.00% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 7.6M | $12.8M | +9.0% | 2.449% | 0.00% |
| 6 | Sumitomo Mitsui Trust Group, Inc. | 6.0M | $10.1M | -14.6% | 1.935% | 0.01% |
| 7 | Amova Asset Management Americas, Inc. | 6.0M | $10.0M | -14.6% | 1.935% | 0.13% |
| 8 | STATE STREET CORP | 6.0M | $10.0M | -2.6% | 1.919% | 0.00% |
| 9 | Point72 Asset Management, L.P. | 4.8M | $8.0M | +1575.6% | 1.541% | 0.01% |
| 10 | TWO SIGMA INVESTMENTS, LP | 4.2M | $7.1M | +20.9% | 1.366% | 0.01% |
| 11 | D. E. Shaw & Co., Inc. | 4.2M | $7.1M | +15.7% | 1.355% | 0.00% |
| 12 | MILLENNIUM MANAGEMENT LLC | 4.0M | $6.7M | -19.0% | 1.276% | 0.00% |
| 13 | GOLDMAN SACHS GROUP INC | 3.2M | $5.4M | +226.8% | 1.040% | 0.00% |
| 14 | CITADEL ADVISORS LLC | 3.0M | $5.1M | +65.5% | 0.973% | 0.00% |
| 15 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 2.8M | $4.7M | +14.5% | 0.892% | 0.00% |
| 16 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2.7M | $4.5M | -6.9% | 0.860% | 0.00% |
| 17 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2.7M | $4.5M | +10.3% | 0.854% | 0.00% |
| 18 | NORTHERN TRUST CORP | 2.4M | $4.0M | +10.4% | 0.758% | 0.00% |
| 19 | VANGUARD FIDUCIARY TRUST CO | 2.2M | $3.7M | +10.1% | 0.704% | 0.00% |
| 20 | Longaeva Partners L.P. | 2.1M | $3.6M | β | 0.682% | 0.08% |
| 21 | IQ EQ FUND MANAGEMENT (IRELAND) Ltd | 1.7M | $2.8M | -5.3% | 0.546% | 0.18% |
| 22 | Birchview Capital, LP | 1.4M | $2.3M | -10.0% | 0.435% | 1.06% |
| 23 | BANK OF AMERICA CORP /DE/ | 1.3M | $2.3M | -19.1% | 0.434% | 0.00% |
| 24 | Invesco Ltd. | 1.3M | $2.2M | -11.7% | 0.418% | 0.00% |
| 25 | AQR CAPITAL MANAGEMENT LLC | 1.3M | $2.2M | +70.7% | 0.417% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in PACB β a direct measure of their conviction.
Filings activity in PACB during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 222 | 3.1% | 61.85% | +0.86 pp | $321M | +30% |
| Q1 2026 | 229 | +6.5% | 60.99% | 6.57 pp | $247M | 34% |
| Q4 2025 | 215 | +8.0% | 67.56% | +5.64 pp | $375M | +58% |
| Q3 2025 | 199 | 1.0% | 61.92% | 3.07 pp | $238M | 1.1% |
| Q2 2025 | 201 | 9.0% | 64.99% | 10.36 pp | $240M | 7.2% |
| Q1 2025 | 221 | 2.2% | 75.35% | 13.07 pp | $259M | 43% |
| Q4 2024 | 226 | +3.2% | 88.42% | +7.27 pp | $458M | +23% |
| Q3 2024 | 219 | β | 81.15% | β | $373M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying PACB stock.
Based on Q2 2026 13F filings, institutional ownership of Pacific Biosciences of California, Inc. stands at 61.9%, held across 222 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of PACB, with approximately 32,339,550 shares worth $0.05B as of Q2 2026.
Yes β 6 widely-followed marquee investors appear among the top 25 institutional holders of PACB, including ARK Investment Management LLC, Point72 Asset Management, L.P., TWO SIGMA INVESTMENTS, LP, MILLENNIUM MANAGEMENT LLC, CITADEL ADVISORS LLC.
Our composite Smart Money Score for PACB is 67 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
22 institutions opened new positions in PACB during Q2 2026, while 28 fully exited. 155 added to existing positions and 38 trimmed.
PACB institutional ownership rose by 0.86 percentage points quarter-over-quarter, with a net change of -7 holders.
The top 10 institutions account for 68.4% of all reported 13F value in PACB, and the top 25 account for 87.4%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Pacific Biosciences of California, Inc. (PACB) Institutional Ownership