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 |
Alibaba
BABA
|
+$48.9M |
| 2 |
Boeing
BA
|
+$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
FedEx
FDX
|
+$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
+$17.5M |
| 4 |
Netflix
NFLX
|
+$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
976
Natera
NTRA
$23.9B
| $74K | ﹤0.01% |
2,259
-1,015
| -31% | -$33.2K |
|
977
ProShares Ultra Euro
ULE
$7.27M
| $73K | ﹤0.01% |
5,600
+5,400
| +2,700% | +$70.4K |
|
|
BOLD
978
DELISTED
Audentes Therapeutics, Inc
BOLD
| $73K | ﹤0.01% |
2,600
-3,042
| -54% | -$85.4K |
|
|
BRKL
979
DELISTED
Brookline Bancorp
BRKL
| $72K | ﹤0.01% |
4,937
-1,853
| -27% | -$27K |
|
|
SHOS
980
DELISTED
Sears Hometown and Outlet Stores, Inc.
SHOS
| $72K | ﹤0.01% |
21,026
+11,642
| +124% | +$39.9K |
|
981
Elastic
ESTC
$9.46B
| $71K | ﹤0.01% |
+872
| New | +$71K |
|
982
Warrior Met Coal
HCC
$3.11B
| $71K | ﹤0.01% |
3,656
+2,194
| +150% | +$42.6K |
|
983
Invesco DB US Dollar Index Bearish Fund
UDN
$147M
| $71K | ﹤0.01% |
3,528
+1,599
| +83% | +$32.2K |
|
|
NUAN
984
DELISTED
Nuance Communications, Inc.
NUAN
| $71K | ﹤0.01% |
5,052
+3,688
| +270% | +$51.8K |
|
|
ADMS
985
DELISTED
Adamas Pharmaceuticals, Inc.
ADMS
| $71K | ﹤0.01% |
13,991
+6,417
| +85% | +$32.6K |
|
|
RP
986
DELISTED
RealPage, Inc.
RP
| $71K | ﹤0.01% |
+1,135
| New | +$71K |
|
987
Akebia Therapeutics
AKBA
$793M
| $70K | ﹤0.01% |
17,991
-31,856
| -64% | -$124K |
|
988
Invesco DB Commodity Index Tracking Fund
DBC
$1.27B
| $70K | ﹤0.01% |
4,682
+900
| +24% | +$13.5K |
|
989
Plains GP Holdings
PAGP
$3.69B
| $70K | ﹤0.01% |
+3,343
| New | +$70K |
|
|
GASL
990
DELISTED
Direxion Daily Natural Gas Related Bull 3X Shares
GASL
| $70K | ﹤0.01% |
78
+44
| +129% | +$39.5K |
|
991
PJT Partners
PJT
$4.54B
| $69K | ﹤0.01% |
1,706
-372
| -18% | -$15K |
|
992
Trustmark
TRMK
$2.44B
| $69K | ﹤0.01% |
2,042
+851
| +71% | +$28.8K |
|
|
XXII
993
22nd Century Group
XXII
$6.81M
| – | – |
0
| – | -$5K |
|
994
Insteel Industries
IIIN
$767M
| $68K | ﹤0.01% |
3,321
-1,734
| -34% | -$35.5K |
|
995
Materion
MTRN
$2.36B
| $68K | ﹤0.01% |
1,115
-757
| -40% | -$46.2K |
|
996
Saic
SAIC
$4.9B
| $68K | ﹤0.01% |
+783
| New | +$68K |
|
|
CRZO
997
DELISTED
Carrizo Oil & Gas Inc
CRZO
| $68K | ﹤0.01% |
7,975
+1,844
| +30% | +$15.7K |
|
998
Helios Technologies
HLIO
$1.85B
| $67K | ﹤0.01% |
1,653
-1,588
| -49% | -$64.4K |
|
999
SPDR S&P Regional Banking ETF
KRE
$4.25B
| $67K | ﹤0.01% |
1,283
-41,652
| -97% | -$2.18M |
|
1000
Global X Uranium ETF
URA
$4.35B
| $67K | ﹤0.01% |
6,096
-20,909
| -77% | -$230K |
|