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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$40.9M |
| 4 |
Apple
AAPL
|
+$16.5M |
| 5 |
Visa
V
|
+$12M |
Top Sells
| 1 |
Amazon
AMZN
|
+$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
+$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$33.4M |
| 4 |
Goldman Sachs
GS
|
+$30.2M |
| 5 |
Boeing
BA
|
+$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
951
Philips
PHG
$27.2B
| $75K | ﹤0.01% |
+2,658
| New | +$75K |
|
|
ATCO
952
DELISTED
Atlas Corp.
ATCO
| $75K | ﹤0.01% |
9,660
+4,489
| +87% | +$34.9K |
|
953
Genie Energy
GNE
$407M
| $74K | ﹤0.01% |
12,420
+11,890
| +2,243% | +$70.8K |
|
954
Medpace
MEDP
$14B
| $74K | ﹤0.01% |
1,416
-3,548
| -71% | -$185K |
|
955
Outfront Media
OUT
$3.13B
| $74K | ﹤0.01% |
4,152
+2,805
| +208% | +$50K |
|
|
TLND
956
DELISTED
Talend S.A. American Depositary Shares
TLND
| $74K | ﹤0.01% |
2,008
-7,166
| -78% | -$264K |
|
957
American Water Works
AWK
$27.2B
| $73K | ﹤0.01% |
+812
| New | +$73K |
|
958
Viking Therapeutics
VKTX
$2.89B
| $72K | ﹤0.01% |
9,534
-52,824
| -85% | -$399K |
|
|
INFN
959
DELISTED
Infinera Corporation Common Stock
INFN
| $72K | ﹤0.01% |
+18,077
| New | +$72K |
|
960
Azenta
AZTA
$1.43B
| $71K | ﹤0.01% |
+2,732
| New | +$71K |
|
961
Evercore
EVR
$13.3B
| $71K | ﹤0.01% |
+1,001
| New | +$71K |
|
962
Martin Midstream Partners
MMLP
$122M
| $71K | ﹤0.01% |
6,973
+2,658
| +62% | +$27.1K |
|
|
GLOG
963
DELISTED
GASLOG LTD
GLOG
| $71K | ﹤0.01% |
4,346
+1,877
| +76% | +$30.7K |
|
|
UFS
964
DELISTED
DOMTAR CORPORATION (New)
UFS
| $71K | ﹤0.01% |
2,032
-14,514
| -88% | -$507K |
|
965
iShares Core S&P Mid-Cap ETF
IJH
$102B
| $70K | ﹤0.01% |
+2,130
| New | +$70K |
|
966
Myers Industries
MYE
$612M
| $70K | ﹤0.01% |
+4,679
| New | +$70K |
|
967
Rigel Pharmaceuticals
RIGL
$678M
| $70K | ﹤0.01% |
3,077
+2,079
| +208% | +$47.3K |
|
|
CCXI
968
DELISTED
ChemoCentryx, Inc.
CCXI
| $70K | ﹤0.01% |
6,426
-11,328
| -64% | -$123K |
|
|
CARB
969
DELISTED
Carbonite Inc
CARB
| $70K | ﹤0.01% |
2,777
-1,476
| -35% | -$37.2K |
|
970
Great Lakes Dredge & Dock
GLDD
$834M
| $69K | ﹤0.01% |
10,440
-6,885
| -40% | -$45.5K |
|
|
TOO
971
DELISTED
Teekay Offshore Partners L.P.
TOO
| $69K | ﹤0.01% |
+57,179
| New | +$69K |
|
972
Acacia Research
ACTG
$314M
| $68K | ﹤0.01% |
22,839
+13,809
| +153% | +$41.1K |
|
973
Avanos Medical
AVNS
$576M
| $68K | ﹤0.01% |
1,524
-139
| -8% | -$6.2K |
|
974
Direxion Daily Emerging Markets Bull 3X Shares
EDC
$95.9M
| $68K | ﹤0.01% |
1,098
-2,029
| -65% | -$126K |
|
975
McEwen Inc.
MUX
$747M
| $68K | ﹤0.01% |
3,755
+2,676
| +248% | +$48.5K |
|