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 |
NVIDIA
NVDA
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
876
ProShares Ultra Energy
DIG
$71.4M
| $98K | ﹤0.01% |
2,820
+160
| +6% | +$5.56K |
|
877
Patterson-UTI
PTEN
$2.13B
| $98K | ﹤0.01% |
8,588
+8,097
| +1,649% | +$92.4K |
|
878
Invesco S&P 500 High Dividend Low Volatility ETF
SPHD
$3.17B
| $98K | ﹤0.01% |
+2,334
| New | +$98K |
|
|
NSTG
879
DELISTED
NanoString Technologies, Inc.
NSTG
| $98K | ﹤0.01% |
3,260
-23,295
| -88% | -$700K |
|
880
Vanguard Energy ETF
VDE
$7.29B
| $97K | ﹤0.01% |
+1,142
| New | +$97K |
|
881
Viking Therapeutics
VKTX
$2.79B
| $96K | ﹤0.01% |
+11,593
| New | +$96K |
|
882
World Kinect Corp
WKC
$1.41B
| $96K | ﹤0.01% |
+2,681
| New | +$96K |
|
|
GRA
883
DELISTED
W.R. Grace & Co.
GRA
| $96K | ﹤0.01% |
1,274
-284
| -18% | -$21.4K |
|
|
AVTA
884
DELISTED
Avantax, Inc. Common Stock
AVTA
| $95K | ﹤0.01% |
+3,131
| New | +$95K |
|
|
NUVA
885
DELISTED
NuVasive, Inc.
NUVA
| $95K | ﹤0.01% |
+1,633
| New | +$95K |
|
|
APU
886
DELISTED
AmeriGas Partners, L.P.
APU
| $95K | ﹤0.01% |
2,728
-19,998
| -88% | -$696K |
|
887
American Eagle Outfitters
AEO
$3.18B
| $94K | ﹤0.01% |
+5,601
| New | +$94K |
|
|
CZZ
888
DELISTED
Cosan Limited
CZZ
| $94K | ﹤0.01% |
+7,097
| New | +$94K |
|
889
MannKind Corp
MNKD
$1.71B
| $93K | ﹤0.01% |
81,138
+53,902
| +198% | +$61.8K |
|
|
DS
890
DELISTED
Drive Shack Inc.
DS
| $93K | ﹤0.01% |
+19,940
| New | +$93K |
|
|
TOO
891
DELISTED
Teekay Offshore Partners L.P.
TOO
| $93K | ﹤0.01% |
73,851
+32,176
| +77% | +$40.5K |
|
892
Evolus
EOLS
$465M
| $92K | ﹤0.01% |
6,295
+6,103
| +3,179% | +$89.2K |
|
893
Teucrium Wheat Fund
WEAT
$118M
| $92K | ﹤0.01% |
16,057
+5,910
| +58% | +$33.9K |
|
|
JBTM
894
JBT Marel Corporation
JBTM
$7.14B
| $92K | ﹤0.01% |
+762
| New | +$92K |
|
895
Astec Industries
ASTE
$1.06B
| $91K | ﹤0.01% |
+2,795
| New | +$91K |
|
896
Caesarstone
CSTE
$48.4M
| $91K | ﹤0.01% |
6,069
-26,226
| -81% | -$393K |
|
897
Duluth Holdings
DLTH
$133M
| $91K | ﹤0.01% |
6,752
+6,356
| +1,605% | +$85.7K |
|
898
ProShares UltraShort FTSE Europe
EPV
$15.8M
| $91K | ﹤0.01% |
+606
| New | +$91K |
|
899
Gerdau
GGB
$6.03B
| $90K | ﹤0.01% |
29,203
-3,517
| -11% | -$10.8K |
|
900
Natera
NTRA
$23.1B
| $90K | ﹤0.01% |
3,274
+1,593
| +95% | +$43.8K |
|