SEC Form 4 · Updated Daily
PACB
— PACIFIC BIOSCIENCES OF CALIFORNIA, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| HENRY CHRISTIAN O | Director | 3,581,813 | 2026-03-03 | S |
| Van Oene Mark | Officer | 2,705,853 | 2026-08-17 | S |
| Gibson James R II | Officer | 1,745,663 | 2026-10-06 | M |
| Turner Stephen W | Officer | 1,093,063 | 2011-07-11 | J |
| Hunkapiller Michael | Director | 1,082,651 | 2021-02-26 | M |
| BARNES SUSAN K | Director | 874,812 | 2020-02-19 | S |
| Eidel Jeff | Officer | 869,730 | 2024-08-19 | S |
| Kim Susan G. | Officer | 695,654 | 2024-09-30 | S |
| Martin Hugh C | Director | 450,467 | 2012-02-03 | M |
| ORDONEZ KATHY | Director | 403,037 | 2024-06-18 | A |
| Farmer Michele | Officer | 305,948 | 2026-03-03 | S |
| Phillips James Michael | Officer | 249,220 | 2020-03-24 | S |
| Fromen Peter | Officer | 190,280 | 2022-03-02 | A |
| Botstein David | Director | 160,000 | 2021-02-12 | M |
| CORCORAN KEVIN P | Officer | 158,174 | 2017-11-24 | M |
| MOHR MARSHALL | Director | 132,821 | 2024-06-18 | A |
| MILLIGAN JOHN F | Director | 132,821 | 2024-06-18 | A |
| Gibson Christopher | Director | 111,386 | 2026-04-08 | A |
| BYERS BROOK H | Director | 110,504 | 2016-04-25 | J |
| Schaefer Eric | Officer | 88,474 | 2021-02-22 | S |
| Gong Benjamin B | Officer | 82,347 | 2020-08-08 | — |
| Zaccarin Denis | Officer | 81,281 | 2020-04-01 | — |
| Seipert Christopher J. | Officer | 66,329 | 2020-04-01 | — |
| SIEGEL SUSAN E | Director | 65,000 | 2011-08-10 | M |
| Meline David W | Director | 57,116 | 2024-06-18 | A |
| Smith Christopher M | Director | 54,099 | 2025-01-30 | A |
| Ericson William W. | Director | 41,616 | 2024-06-18 | A |
| LIVINGSTON RANDALL S | Director | 22,821 | 2024-06-18 | A |
| Shapiro Lucy | Director | 22,821 | 2024-06-18 | A |
| Valantine Hannah | Director | 22,821 | 2024-06-18 | A |
| Dow Brian B | Officer | 18,119 | 2015-03-02 | P |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-10-06 | Gibson James R II | Option exercise (derivative) | 500,000 | $0.00 | 1,500,000 |
| 2026-10-06 | Gibson James R II | Open-market sale | 661,815 | $3.11 | 1,083,848 |
| 2026-10-06 | Gibson James R II | Option exercise | 500,000 | $1.18 | 1,745,663 |
| 2026-08-17 | Van Oene Mark | Open-market sale | 26,911 | $1.13 | 2,705,853 |
| 2026-08-10 | Van Oene Mark | Grant / award (derivative) | 1,967,888 | $0.00 | 1,967,888 |
| 2026-08-10 | Van Oene Mark | Grant / award | 489,130 | $0.00 | 2,732,764 |
| 2026-06-03 | ORDONEZ KATHY | Grant / award (derivative) | 223,492 | $0.00 | 223,492 |
| 2026-06-03 | MILLIGAN JOHN F | Grant / award (derivative) | 223,492 | $0.00 | 223,492 |
| 2026-06-03 | Ericson William W. | Grant / award (derivative) | 223,492 | $0.00 | 223,492 |
| 2026-06-03 | LIVINGSTON RANDALL S | Grant / award (derivative) | 223,492 | $0.00 | 223,492 |
| 2026-06-03 | Valantine Hannah | Grant / award (derivative) | 223,492 | $0.00 | 223,492 |
| 2026-06-03 | Smith Christopher M | Grant / award (derivative) | 223,492 | $0.00 | 223,492 |
| 2026-06-03 | Gibson Christopher | Grant / award (derivative) | 74,497 | $0.00 | 74,497 |
| 2026-06-03 | MOHR MARSHALL | Grant / award (derivative) | 223,492 | $0.00 | 223,492 |
| 2026-04-08 | Gibson Christopher | Grant / award (derivative) | 77,842 | $0.00 | 77,842 |
| 2026-04-08 | Gibson Christopher | Grant / award | 57,473 | $0.00 | 111,386 |
| 2026-04-01 | Gibson James R II | Open-market sale | 88,185 | $1.37 | 1,245,663 |
| 2026-03-03 | Farmer Michele | Open-market sale | 2,979 | $1.51 | 305,948 |
| 2026-03-03 | Van Oene Mark | Open-market sale | 6,504 | $1.51 | 2,243,634 |
| 2026-03-03 | HENRY CHRISTIAN O | Open-market sale | 12,497 | $1.51 | 3,581,813 |
| 2026-03-03 | Gibson Christopher | Grant / award (derivative) | 73,087 | $0.00 | 73,087 |
| 2026-03-03 | Gibson Christopher | Grant / award | 53,913 | $0.00 | 53,913 |
| 2026-02-27 | HENRY CHRISTIAN O | Grant / award (derivative) | 1,841,621 | $0.00 | 1,841,621 |
| 2026-02-27 | HENRY CHRISTIAN O | Grant / award | 920,810 | $0.00 | 3,594,310 |
| 2026-02-27 | Van Oene Mark | Grant / award (derivative) | 1,000,000 | $0.00 | 1,000,000 |
| 2026-02-27 | Van Oene Mark | Grant / award | 500,000 | $0.00 | 2,242,638 |
| 2026-02-27 | Gibson James R II | Grant / award (derivative) | 667,696 | $0.00 | 667,696 |
| 2026-02-27 | Gibson James R II | Grant / award | 333,848 | $0.00 | 1,333,848 |
| 2026-02-27 | Farmer Michele | Grant / award (derivative) | 179,670 | $0.00 | 179,670 |
| 2026-02-27 | Farmer Michele | Grant / award | 89,835 | $0.00 | 308,927 |
| 2026-02-18 | Farmer Michele | Open-market sale | 14,952 | $1.63 | 219,092 |
| 2026-02-18 | HENRY CHRISTIAN O | Open-market sale | 140,874 | $1.63 | 2,673,500 |
| 2026-02-18 | Van Oene Mark | Open-market sale | 55,107 | $1.63 | 1,742,638 |
| 2026-02-17 | Farmer Michele | Open-market sale | 35,215 | $1.58 | 234,044 |
| 2026-02-17 | HENRY CHRISTIAN O | Open-market sale | 331,793 | $1.58 | 2,814,374 |
| 2026-02-17 | Van Oene Mark | Open-market sale | 129,790 | $1.58 | 1,797,745 |
| 2025-08-18 | Van Oene Mark | Open-market sale | 26,836 | $1.31 | 1,920,035 |
| 2025-06-04 | Smith Christopher M | Grant / award (derivative) | 32,500 | $0.00 | 32,500 |
| 2025-06-04 | Valantine Hannah | Grant / award (derivative) | 65,000 | $0.00 | 65,000 |
| 2025-06-04 | MILLIGAN JOHN F | Grant / award (derivative) | 65,000 | $0.00 | 65,000 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.