Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$29.3M |
| 2 |
SPDR Gold Trust
GLD
|
+$18.1M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$14.9M |
| 4 |
Biogen
BIIB
|
+$13.7M |
| 5 |
Visa
V
|
+$13.3M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$37.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$13.9M |
| 5 |
SPDR S&P MidCap 400 ETF Trust
MDY
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 12.51% |
| 2 | Healthcare | 12.38% |
| 3 | Technology | 12.22% |
| 4 | Consumer Discretionary | 8.59% |
| 5 | Financials | 8.53% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
FPRX
1076
DELISTED
Five Prime Therapeutics, Inc.
FPRX
| $27K | ﹤0.01% |
+660
| New | +$27K |
|
|
DFT
1077
DELISTED
DuPont Fabros Technology Inc.
DFT
| $27K | ﹤0.01% |
585
-367
| -39% | -$16.9K |
|
1078
Microvision
MVIS
$349M
| $26K | ﹤0.01% |
15,487
+2,208
| +17% | +$3.71K |
|
1079
NNN REIT
NNN
$8.15B
| $26K | ﹤0.01% |
509
+494
| +3,293% | +$25.2K |
|
1080
abrdn Physical Silver Shares ETF
SIVR
$2.6B
| $26K | ﹤0.01% |
1,430
+249
| +21% | +$4.53K |
|
1081
Tetra Tech
TTEK
$9.49B
| $26K | ﹤0.01% |
4,230
+3,655
| +636% | +$22.5K |
|
1082
UDR
UDR
$12.8B
| $26K | ﹤0.01% |
+726
| New | +$26K |
|
1083
VanEck Biotech ETF
BBH
$354M
| $25K | ﹤0.01% |
249
-376
| -60% | -$37.8K |
|
|
FLNT
1084
Fluent
FLNT
$50M
| $25K | ﹤0.01% |
+883
| New | +$25K |
|
1085
Keysight
KEYS
$29.5B
| $25K | ﹤0.01% |
876
+834
| +1,986% | +$23.8K |
|
1086
Toll Brothers
TOL
$14B
| $25K | ﹤0.01% |
+959
| New | +$25K |
|
1087
Walker & Dunlop
WD
$2.93B
| $25K | ﹤0.01% |
+1,140
| New | +$25K |
|
|
XNET
1088
Xunlei
XNET
$465M
| $25K | ﹤0.01% |
4,931
+2,113
| +75% | +$10.7K |
|
|
CSCI
1089
DELISTED
COSCIENS Biopharma Inc. Common Stock
CSCI
| $25K | ﹤0.01% |
+79
| New | +$25K |
|
|
ENH
1090
DELISTED
Endurance Specialty Holdings Ltd
ENH
| $25K | ﹤0.01% |
384
+53
| +16% | +$3.45K |
|
|
FCS
1091
DELISTED
FAIRCHILD SEMICONDUCTOR INTL INC COMMON
FCS
| $25K | ﹤0.01% |
+1,302
| New | +$25K |
|
1092
Arbutus Biopharma
ABUS
$895M
| $24K | ﹤0.01% |
7,110
+1,249
| +21% | +$4.22K |
|
1093
Ameren
AEE
$27.2B
| $24K | ﹤0.01% |
+449
| New | +$24K |
|
1094
Globus Medical
GMED
$7.99B
| $24K | ﹤0.01% |
1,025
-18,993
| -95% | -$445K |
|
1095
Genworth Financial
GNW
$3.6B
| $24K | ﹤0.01% |
9,484
-49,064
| -84% | -$124K |
|
1096
iShares S&P Mid-Cap 400 Growth ETF
IJK
$9.26B
| $24K | ﹤0.01% |
+580
| New | +$24K |
|
1097
MacroGenics
MGNX
$102M
| $24K | ﹤0.01% |
+900
| New | +$24K |
|
1098
ResMed
RMD
$39.9B
| $24K | ﹤0.01% |
389
-762
| -66% | -$47K |
|
1099
Telus
TU
$24.3B
| $24K | ﹤0.01% |
1,536
-2,020
| -57% | -$31.6K |
|
|
NSTG
1100
DELISTED
NanoString Technologies, Inc.
NSTG
| $24K | ﹤0.01% |
1,981
-1,068
| -35% | -$12.9K |
|