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 |
Amazon
AMZN
|
+$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$26.1M |
| 4 |
Booking.com
BKNG
|
+$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$42.8M |
| 2 |
Amgen
AMGN
|
+$32.3M |
| 3 |
Baidu
BIDU
|
+$21.9M |
| 4 |
Micron Technology
MU
|
+$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
+$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
951
Canadian Solar
CSIQ
$725M
| $70K | ﹤0.01% |
4,194
-52,196
| -93% | -$871K |
|
952
iShares MSCI Sweden ETF
EWD
$325M
| $70K | ﹤0.01% |
1,967
+890
| +83% | +$31.7K |
|
953
Masimo
MASI
$7.92B
| $70K | ﹤0.01% |
809
-5,750
| -88% | -$498K |
|
954
Usana Health Sciences
USNA
$551M
| $69K | ﹤0.01% |
+1,198
| New | +$69K |
|
955
Western Union
WU
$2.73B
| $68K | ﹤0.01% |
+3,548
| New | +$68K |
|
956
Ziff Davis
ZD
$1.5B
| $68K | ﹤0.01% |
+1,072
| New | +$68K |
|
|
LQ
957
DELISTED
La Quinta Holdings Inc.
LQ
| $68K | ﹤0.01% |
3,924
-3,583
| -48% | -$62.1K |
|
958
Fossil Group
FOSL
$159M
| $67K | ﹤0.01% |
7,210
-76,484
| -91% | -$711K |
|
959
OraSure Technologies
OSUR
$238M
| $67K | ﹤0.01% |
+2,990
| New | +$67K |
|
960
AngioDynamics
ANGO
$445M
| $66K | ﹤0.01% |
+3,864
| New | +$66K |
|
961
Invesco CurrencyShares British Pound Sterling Trust
FXB
$91M
| $66K | ﹤0.01% |
511
-4,639
| -90% | -$599K |
|
962
Universal Display
OLED
$6.52B
| $66K | ﹤0.01% |
+515
| New | +$66K |
|
|
AFSI
963
DELISTED
AmTrust Financial Services, Inc.
AFSI
| $66K | ﹤0.01% |
4,976
-32,041
| -87% | -$425K |
|
964
Neurocrine Biosciences
NBIX
$14B
| $65K | ﹤0.01% |
1,076
+855
| +387% | +$51.7K |
|
965
Boston Beer
SAM
$2.39B
| $65K | ﹤0.01% |
418
-284
| -40% | -$44.2K |
|
966
ProShares UltraShort Financials
SKF
$10.2M
| $65K | ﹤0.01% |
171
+9
| +6% | +$3.42K |
|
967
Direxion Daily Small Cap Bear 3x Shares
TZA
$294M
| $65K | ﹤0.01% |
120
+47
| +64% | +$25.5K |
|
968
Verastem
VSTM
$608M
| $65K | ﹤0.01% |
1,162
+677
| +140% | +$37.9K |
|
969
NCR Voyix
VYX
$1.73B
| $65K | ﹤0.01% |
2,839
+1,227
| +76% | +$28.1K |
|
|
CUTR
970
DELISTED
Cutera, Inc.
CUTR
| $65K | ﹤0.01% |
+1,573
| New | +$65K |
|
971
Trupanion
TRUP
$1.86B
| $64K | ﹤0.01% |
2,438
+2,344
| +2,494% | +$61.5K |
|
972
AGCO
AGCO
$8.02B
| $64K | ﹤0.01% |
877
-3,041
| -78% | -$222K |
|
973
Anavex Life Sciences
AVXL
$763M
| $64K | ﹤0.01% |
15,698
+15,053
| +2,334% | +$61.4K |
|
974
Community Health Systems
CYH
$409M
| $64K | ﹤0.01% |
+8,402
| New | +$64K |
|
975
Genesis Energy
GEL
$2.03B
| $64K | ﹤0.01% |
2,444
-646
| -21% | -$16.9K |
|