Ticker · CUSIP 68218J103

OABI

OMNIAB INC

Healthcare·Biotechnology

···Share

Holders (tracked)

Combined shares

2,110,828

Combined value

$3.68M

Last close

$1.64

Quarter

2025Q4

Price is -6.0% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$1.64-0.15 (-8.38%)H $2.20 · L $1.25 · Avg Vol 610K

Position opened

Tracked holders · last 8 quarters

Flat over the last 8 quarters.

SEC event timeline

12 events

D.E. Shaw & Co. added2026-02-17
+196,871 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) trimmed2026-02-17
−551,665 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) added2026-02-17
+387,594 shares · 2025Q4
Position
Two Sigma Investments added2026-02-17
+131,369 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+1,066 shares · 2025Q4
Position
Renaissance Technologies trimmed2026-02-12
−280,754 shares · 2025Q4
Position
AQR Capital Management added2025-11-14
+296 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) trimmed2025-11-14
−364,515 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+60,047 shares · 2025Q3
Position
D.E. Shaw & Co. opened position2025-11-14
+186,281 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+5,574 shares · 2025Q3
Position
Renaissance Technologies trimmed2025-11-13
−184,096 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for OABI →

Follow-the-investor returns

If you'd copied each holder of OABI…

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)	2022Q4	$1.61	+1.6%	$1.1M
Two Sigma Investments	2022Q4	$1.83	-10.2%	$694K
Ken Griffin (Citadel Advisors)	2022Q4	$1.83	-10.3%	$468K
Ken Griffin (Citadel Advisors)	2022Q4	$1.83	-10.3%	$468K
Renaissance Technologies	2023Q2	$1.86	-12.0%	$398K
AQR Capital Management	2025Q1	$2.02	-19.0%	$40K
D.E. Shaw & Co.	2023Q2	$2.12	-22.7%	$628K
T. Rowe Price	2022Q4	$3.53	-53.6%	$87K

Who moved on this name in 2025Q4

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

New positions0

—

Added to4

Izzy Englander (Millennium Mgmt)
+387,594
$588K
D.E. Shaw & Co.
+196,871
$364K
Two Sigma Investments
+131,369
$243K
AQR Capital Management
+1,066
$2K

Trimmed2

Ken Griffin (Citadel Advisors)
−551,665
$1.0M
Renaissance Technologies
−280,754
$519K

Exited0

—

Institutional ownership over time

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

Quarter	Holders	Shares	Combined value	Δ holders
2022Q4	9	12,700,407	$45.7M	—
2023Q1	8	12,225,871	$44.6M	-1
2023Q2	10	11,526,638	$57.4M	+2
2023Q3	9	11,040,913	$56.7M	-1
2023Q4	8	9,713,724	$59.2M	-1
2024Q1	8	10,347,291	$55.5M	—
2024Q2	8	8,508,844	$31.5M	—
2024Q3	7	578,773	$2.0M	-1
2024Q4	6	693,224	$2.0M	-1
2025Q1	7	405,783	$682K	+1
2025Q2	6	3,792,553	$6.4M	-1
2025Q3	8	2,226,547	$3.4M	+2
2025Q4	8	2,110,828	$3.7M	—

Who owns OABI

8 super-investors · 2025Q4

Tracked stake

2.11M

Combined value

$4M

% of shares outstanding

—

shares-out unknown

Quarter action mix

Added4Trim3Held1

#	Manager	Shares	Value	% of book	Last action
1	Izzy Englander Millennium Mgmt	673.4K	$1M	0.0%	Added+387.6K
2	Two Sigma Investments	423.1K	$783K	0.0%	Added+131.4K
3	D.E. Shaw & Co.	383.2K	$709K	0.0%	Added+196.9K
4	Ken Griffin Citadel Advisors	285.1K	$527K	0.0%	Trim−551.7K
5	Renaissance Technologies	242.7K	$449K	0.0%	Trim−280.8K
6	T. Rowe Price	53.2K	$100K	0.0%	Held
7	Ken Griffin Citadel Advisors	26.0K	$48K	0.0%	Trim−551.7K
8	AQR Capital Management	24.2K	$45K	0.0%	Added+1.1K

Recent moves

20 transactions

TRIMKen Griffin (Citadel Advisors)
−551,665 · 2025Q4
ADDAQR Capital Management
+1,066 · 2025Q4
ADDTwo Sigma Investments
+131,369 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+387,594 · 2025Q4
ADDD.E. Shaw & Co.
+196,871 · 2025Q4
TRIMRenaissance Technologies
−280,754 · 2025Q4
ADDT. Rowe Price
+5,574 · 2025Q3
ADDTwo Sigma Investments
+60,047 · 2025Q3
ADDAQR Capital Management
+296 · 2025Q3
NEWD.E. Shaw & Co.
+186,281 · 2025Q3
TRIMIzzy Englander (Millennium Mgmt)
−364,515 · 2025Q3
TRIMRenaissance Technologies
−184,096 · 2025Q3
ADDAQR Capital Management
+12,520 · 2025Q2
ADDIzzy Englander (Millennium Mgmt)
+518,645 · 2025Q2
NEWTwo Sigma Investments
+231,688 · 2025Q2
ADDT. Rowe Price
+8,299 · 2025Q2
ADDRenaissance Technologies
+680,950 · 2025Q2
TRIMIzzy Englander (Millennium Mgmt)
−55,074 · 2025Q1
SOLDTwo Sigma Investments
−10,292 · 2025Q1
NEWAQR Capital Management
+10,271 · 2025Q1

Embed this chart

Paste this iframe anywhere to embed the live OABI chart.

<iframe src="https://openstocks.me/embed/stocks/OABI" width="100%" height="480" frameborder="0" loading="lazy" title="OABI chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>

Preview: https://openstocks.me/embed/stocks/OABI

Explore related topics