RBCN

Rubicon Technology, Inc.
RBCN

Overview Fund Activity
Delisted

RBCN was delisted on the 29th of December, 2022.

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105 hedge funds and large institutions have $217M invested in Rubicon Technology, Inc. in 2013 Q3 according to their latest regulatory filings, with 22 funds opening new positions, 39 increasing their positions, 31 reducing their positions, and 16 closing their positions.

Holders
105
Holders Change
+4
Holders Change %
+3.96%
% of All Funds
3.41%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
22
Increased
39
Reduced
31
Closed
16
Calls
$2M
Puts
$857K
Net Calls
+$1.14M
Net Calls Change
+$564K

Top Buyers

1
Massachusetts Financial Services
1
Massachusetts Financial Services
Massachusetts
$25M
2
WRF
2
Waddell & Reed Financial
Kansas
$14.4M
3
QAM
3
Quentec Asset Management
New York
$5.98M
4
ICM
4
Invicta Capital Management
New York
$6.06M
5
EIM
5
Essex Investment Management
Massachusetts
$5.94M

Top Sellers

1
AI
1
Ariel Investments
Illinois
$4.93M
2
SCM
2
Signia Capital Management
Washington
$2.73M
3
AF
3
Aegis Financial
Virginia
$2.17M
4
PC
4
Passport Capital
California
$0
5
TAM
5
Tocqueville Asset Management
New York
$6.09M
Name Market Value Shares Shares
Change 		Shares
Change %
Massachusetts Financial Services
1
Massachusetts Financial Services
Massachusetts
$25M 2,061,273 +2,061,273 New
Fidelity Investments
2
Fidelity Investments
Massachusetts
$22.1M 1,828,453 +87,148 +5%
RA
3
Royce & Associates
New York
$20M 1,648,722 +33,600 +2%
WRF
4
Waddell & Reed Financial
Kansas
$14.4M 1,191,500 +591,000 +98%
BFA
5
BlackRock Fund Advisors
California
$12M 987,618 +56,880 +6%
Dimensional Fund Advisors
6
Dimensional Fund Advisors
Texas
$7.41M 612,060 -2,277 -0.4%
Vanguard Group
7
Vanguard Group
Pennsylvania
$7.11M 587,188 +25,956 +5%
CAM
8
Cortina Asset Management
Wisconsin
$7.09M 585,467 -174,343 -23%
BIT
9
BlackRock Institutional Trust
California
$6.79M 560,374 +40,882 +8%
TAM
10
Tocqueville Asset Management
New York
$6.09M 503,054 -242,805 -33%
ICM
11
Invicta Capital Management
New York
$6.06M 500,000 +400,000 +400%
QAM
12
Quentec Asset Management
New York
$5.98M 494,000 +494,000 New
EIM
13
Essex Investment Management
Massachusetts
$5.94M 490,518 +238,521 +95%
Invesco
14
Invesco
Georgia
$5.42M 447,496 +233,811 +109%
AI
15
Ariel Investments
Illinois
$4.93M 407,436 -1,009,984 -71%
State Street
16
State Street
Massachusetts
$3.75M 309,684 +6,873 +2%
RIM
17
RS Investment Management
California
$3.64M 300,822 -66,100 -18%
IMIM
18
Irving Magee Investment Management
Pennsylvania
$3.55M 293,080 – –
LAM
19
Lapides Asset Management
Connecticut
$3.15M 260,300 -94,800 -27%
Northern Trust
20
Northern Trust
Illinois
$3.14M 259,176 +12,093 +5%
Lord, Abbett & Co
21
Lord, Abbett & Co
New Jersey
$2.81M 232,319 +232,319 New
SCM
22
Signia Capital Management
Washington
$2.73M 225,294 -614,854 -73%
Bank of New York Mellon
23
Bank of New York Mellon
New York
$2.26M 186,728 +52,114 +39%
AF
24
Aegis Financial
Virginia
$2.17M 179,487 -398,995 -69%
Royal Bank of Canada
25
Royal Bank of Canada
Ontario, Canada
$2.1M 173,275 -131,611 -43%
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