PACB · Insider trading · 13F holders · Congress trades
Pacific Biosciences Of California, Inc. (PACB)
Who is buying and selling PACB: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 8
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $2.1M
- Congress trades, 12 months
- 0
PACB at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 2 PACB insiders filed 2 sales worth $2.1M on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
- 8 13F filers hold PACB among their 50 largest positions, worth $41.3M combined. The biggest bets by portfolio weight are Birchview Capital, LP (1.1%), Bourne Lent Asset Management Inc (0.5%) and Softbank Group Corp. (0.2%).
- No member of Congress has disclosed a trade in PACB.
- PACB last closed at $2.90 on Oct 29, 2026.
PACB insider trading
Between Aug 1, 2026 and Oct 29, 2026, 2 PACB insiders filed 2 sales worth $2.1M on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 8, 2026 | Gibson James R II | See Remarks | Sale10b5-1 | 661,815 | $3.11 | $2.1M | SEC |
| Aug 18, 2026 | Van Oene Mark | See Remarks | Sale | 26,911 | $1.13 | $30K | SEC |
Who owns PACB? Hedge funds and superinvestors
8 13F filers hold PACB among their 50 largest positions, worth $41.3M combined. The biggest bets by portfolio weight are Birchview Capital, LP (1.1%), Bourne Lent Asset Management Inc (0.5%) and Softbank Group Corp. (0.2%).
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Softbank Group Corp.Hedge fund | 0.2% | $34.4M | 20,451,570 | +0.0% shares | Q2 2026 |
| Birchview Capital, LPWealth manager | 1.1% | $2.3M | 1,350,000 | -10.0% shares | Q2 2026 |
| Bourne Lent Asset Management IncWealth manager | 0.5% | $1.6M | 943,055 | -0.8% shares | Q2 2026 |
| Hhlr Advisors, Ltd.Hedge fund | 0.2% | $1.5M | 918,892 | +0.0% shares | Q2 2026 |
| Casdin Capital, LLCHedge fund | 0.1% | $1.2M | 723,767 | +0.0% shares | Q2 2026 |
| Koa Wealth Management, LLCWealth manager | 0.2% | $284K | 120,000 | — | Q3 2026 |
| Pinegrove Venture Partners, LLCVenture capital | 0.5% | $35K | 20,586 | +0.0% shares | Q2 2026 |
| Bronte Capital Management Pty Ltd.Hedge fund | 0.0% | $30K | 17,881 | — | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 1, Q2 2026: 7). Screen PACB in the grand portfolio →
PACB stock trades by members of Congress
No member of Congress has disclosed a trade in PACB.
PACB questions and answers
Are insiders buying PACB stock?
Between Aug 1, 2026 and Oct 29, 2026, 2 PACB insiders filed 2 sales worth $2.1M on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own PACB?
8 13F filers hold PACB among their 50 largest positions, worth $41.3M combined. The biggest bets by portfolio weight are Birchview Capital, LP (1.1%), Bourne Lent Asset Management Inc (0.5%) and Softbank Group Corp. (0.2%).
Has Congress traded PACB?
No member of Congress has disclosed a trade in PACB.
Who is the largest holder of PACB?
Among 13F filers, Softbank Group Corp. reports the largest PACB position, $34.4M (20,451,570 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Birchview Capital, LP's: 1.1% of its portfolio.
Cite or share this
Free to use with a link back. The data updates every filing day.