Ticker · CUSIP 69404D108

PACB

PACIFIC BIOSCIENCES CALIF IN

Healthcare·Medical Devices

···Share

Holders (tracked)

Combined shares

60,558,078

Combined value

$113.24M

Last close

$1.69

Quarter

2025Q4

Price is -9.6% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$1.69+0.52 (+44.44%)H $2.67 · L $0.91 · Avg Vol 7.9M

Tracked holders · last 8 quarters

+3 vs previous quarter over the last 8.

SEC event timeline

17 events

AQR Capital Management added2026-02-17
+35,629 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) added2026-02-17
+667,887 shares · 2025Q4
Position
D.E. Shaw & Co. opened position2026-02-17
+4,438,273 shares · 2025Q4
Position
Two Sigma Investments added2026-02-17
+2,475,418 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−572,226 shares · 2025Q4
Position
Steve Cohen (Point72) opened position2026-02-17
+2,957,400 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+17,663 shares · 2025Q4
Position
Renaissance Technologies opened position2026-02-12
+3,850,600 shares · 2025Q4
Position
Cathie Wood (ARK Invest) added2026-02-11
+6,340,125 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+4,048,555 shares · 2025Q3
Position
Steve Cohen (Point72) exited2025-11-14
−914,190 shares · 2025Q3
Position
Two Sigma Investments opened position2025-11-14
+401,766 shares · 2025Q3
Position
D.E. Shaw & Co. exited2025-11-14
−32,073 shares · 2025Q3
Position
T. Rowe Price trimmed2025-11-14
−133,373 shares · 2025Q3
Position
AQR Capital Management added2025-11-14
+34,346 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-12
−1,213,637 shares · 2024Q3
Position
Cathie Wood (ARK Invest) trimmed2025-11-12
−5,374,060 shares · 2025Q3
Position

Insider activity

Last 30 days

Net (open-market)

Buys

0 · $0

Sells

0 · $0

Unique insiders

Date	Insider	Code	Shares	Price	Value
04-08	Gibson Christopher Director	A	57,473	—	$0

View full insider history for PACB →

Follow-the-investor returns

If you'd copied each holder of PACB…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Izzy Englander (Millennium Mgmt)	2016Q1	$1.28	+32.1%	$7.3M
Ken Griffin (Citadel Advisors)	2016Q1	$1.85	-8.7%	$5.4M
Ken Griffin (Citadel Advisors)	2016Q1	$1.85	-8.7%	$5.4M
Ken Griffin (Citadel Advisors)	2016Q1	$1.85	-8.7%	$5.4M
D.E. Shaw & Co.	2016Q2	$1.87	-9.5%	$7.5M
Two Sigma Investments	2016Q1	$1.92	-11.8%	$4.9M
Steve Cohen (Point72)	2016Q1	$2.45	-31.1%	$5.0M
AQR Capital Management	2016Q1	$2.47	-31.5%	$147K
Renaissance Technologies	2016Q1	$2.64	-35.9%	$6.5M
Cathie Wood (ARK Invest)	2017Q3	$5.67	-70.2%	$63.0M
T. Rowe Price	2016Q1	$10.90	-84.5%	$276K
Hillhouse (HHLR Advisors)	2021Q3	$25.40	-93.3%	$1.6M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions3

D.E. Shaw & Co.
+4,438,273
$8.3M
Renaissance Technologies
+3,850,600
$7.2M
Steve Cohen (Point72)
+2,957,400
$5.5M

Added to5

Cathie Wood (ARK Invest)
+6,340,125
$11.9M
Two Sigma Investments
+2,475,418
$4.6M
Ken Griffin (Citadel Advisors)
+667,887
$1.2M
AQR Capital Management
+35,629
$67K
T. Rowe Price
+17,663
$33

Trimmed1

Izzy Englander (Millennium Mgmt)
−572,226
$1.1M

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	15	61,026,110	$12.21B	—
2022Q2	15	66,206,690	$5.84B	—
2022Q3	13	60,244,493	$349.7M	-2
2022Q4	14	61,030,750	$499.2M	+1
2023Q1	13	66,683,409	$772.2M	-1
2023Q2	16	67,212,112	$893.9M	+3
2023Q3	16	66,360,780	$554.1M	—
2023Q4	13	71,643,288	$702.8M	-3
2024Q1	16	67,901,515	$254.6M	+3
2024Q2	14	71,190,824	$97.5M	-2
2024Q3	12	49,809,668	$84.7M	-2
2024Q4	11	61,251,093	$112.1M	-1
2025Q1	10	41,723,962	$49.2M	-1
2025Q2	10	39,834,884	$49.4M	—
2025Q3	9	40,285,909	$51.6M	-1
2025Q4	12	60,558,078	$113.2M	+3

Who owns PACB

12 super-investors · 2025Q4

Tracked stake

60.56M

Combined value

$113M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New3Added7Trim1Held1

#	Manager	Shares	Value	% of book	Last action
1	Cathie Wood ARK Invest	37.26M	$70M	0.5%	Added+6.34M
2	D.E. Shaw & Co.	4.44M	$8M	0.0%	New+4.44M
3	Izzy Englander Millennium Mgmt	4.34M	$8M	0.0%	Trim−572.2K
4	Renaissance Technologies	3.85M	$7M	0.0%	New+3.85M
5	Ken Griffin Citadel Advisors	3.17M	$6M	0.0%	Added+667.9K
6	Steve Cohen Point72	2.96M	$6M	0.0%	New+2.96M
7	Two Sigma Investments	2.88M	$5M	0.0%	Added+2.48M
8	Hillhouse HHLR Advisors	918.9K	$2M	0.1%	Held
9	Ken Griffin Citadel Advisors	341.0K	$638K	0.0%	Added+667.9K
10	T. Rowe Price	163.5K	$306K	0.0%	Added+17.7K
11	Ken Griffin Citadel Advisors	149.2K	$279K	0.0%	Added+667.9K
12	AQR Capital Management	87.0K	$163K	0.0%	Added+35.6K

Recent moves

20 transactions

ADDAQR Capital Management
+35,629 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−572,226 · 2025Q4
ADDT. Rowe Price
+17,663 · 2025Q4
NEWD.E. Shaw & Co.
+4,438,273 · 2025Q4
ADDTwo Sigma Investments
+2,475,418 · 2025Q4
NEWSteve Cohen (Point72)
+2,957,400 · 2025Q4
ADDKen Griffin (Citadel Advisors)
+667,887 · 2025Q4
NEWRenaissance Technologies
+3,850,600 · 2025Q4
ADDCathie Wood (ARK Invest)
+6,340,125 · 2025Q4
SOLDD.E. Shaw & Co.
−32,073 · 2025Q3
SOLDSteve Cohen (Point72)
−914,190 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+4,048,555 · 2025Q3
TRIMT. Rowe Price
−133,373 · 2025Q3
NEWTwo Sigma Investments
+401,766 · 2025Q3
ADDAQR Capital Management
+34,346 · 2025Q3
TRIMCathie Wood (ARK Invest)
−5,374,060 · 2025Q3
SOLDNorges Bank (Norway SWF)
−1,213,637 · 2024Q3
NEWSteve Cohen (Point72)
+914,190 · 2025Q2
TRIMIzzy Englander (Millennium Mgmt)
−1,335,804 · 2025Q2
SOLDTwo Sigma Investments
−542,200 · 2025Q2

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