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 |
Apple
AAPL
|
+$186M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$86.2M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$56.8M |
| 4 |
iShares Silver Trust
SLV
|
+$42.9M |
| 5 |
Advanced Micro Devices
AMD
|
+$36.5M |
Top Sells
| 1 |
Occidental Petroleum
OXY
|
+$44.4M |
| 2 |
Financial Select Sector SPDR Fund
XLF
|
+$42.8M |
| 3 |
Verizon
VZ
|
+$40.8M |
| 4 |
Direxion Daily S&P 500 Bull 3x Shares
SPXL
|
+$33.6M |
| 5 |
iShares China Large-Cap ETF
FXI
|
+$33M |
Sector Composition
| 1 | Technology | 23.31% |
| 2 | Consumer Discretionary | 13.02% |
| 3 | Industrials | 8.23% |
| 4 | Healthcare | 7.47% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
926
First Interstate BancSystem
FIBK
$3.37B
| $301K | ﹤0.01% |
8,198
+8,197
| +819,700% | +$301K |
|
|
927
Occidental Petroleum
OXY
$45.6B
| $300K | ﹤0.01% |
5,300
-783,593
| -99% | -$44.4M |
|
928
Mirion Technologies
MIR
$4.92B
| $299K | ﹤0.01% |
+37,056
| New | +$299K |
|
929
CACI
CACI
$10.7B
| $297K | ﹤0.01% |
987
+203
| +26% | +$61.1K |
|
930
SPDR Portfolio Long Term Treasury ETF
SPTL
$11.8B
| $296K | ﹤0.01% |
+7,830
| New | +$296K |
|
931
A10 Networks
ATEN
$1.26B
| $295K | ﹤0.01% |
21,153
-1,194
| -5% | -$16.7K |
|
932
Frontline
FRO
$5.02B
| $294K | ﹤0.01% |
33,412
-3,728
| -10% | -$32.8K |
|
933
Navios Maritime Partners
NMM
$1.42B
| $294K | ﹤0.01% |
8,358
-4,402
| -34% | -$155K |
|
934
Piper Sandler
PIPR
$5.95B
| $294K | ﹤0.01% |
+2,246
| New | +$294K |
|
935
Smith Micro Software
SMSI
$15.3M
| $294K | ﹤0.01% |
9,762
+5,883
| +152% | +$177K |
|
936
GlobalFoundries
GFS
$17.7B
| $291K | ﹤0.01% |
4,673
-5,422
| -54% | -$338K |
|
937
Groupon
GRPN
$916M
| $290K | ﹤0.01% |
15,119
-42,644
| -74% | -$818K |
|
|
LAND
938
Gladstone Land Corp
LAND
$321M
| $290K | ﹤0.01% |
7,986
-3,129
| -28% | -$114K |
|
939
VanEck Rare Earth/Strategic Metals ETF
REMX
$713M
| $290K | ﹤0.01% |
+2,459
| New | +$290K |
|
940
Hershey
HSY
$37.6B
| $289K | ﹤0.01% |
+1,336
| New | +$289K |
|
941
ResMed
RMD
$39.6B
| $287K | ﹤0.01% |
1,186
-6,608
| -85% | -$1.6M |
|
942
GrafTech
EAF
$199M
| $285K | ﹤0.01% |
2,967
+1,850
| +166% | +$178K |
|
|
GOGL
943
DELISTED
Golden Ocean Group
GOGL
| $285K | ﹤0.01% |
+23,036
| New | +$285K |
|
944
Direxion Daily S&P Oil & Gas Exp & Prod Bear 2X Shares
DRIP
$50M
| $284K | ﹤0.01% |
+11,796
| New | +$284K |
|
945
Westwater Resources
WWR
$59.8M
| $284K | ﹤0.01% |
142,209
+137,918
| +3,214% | +$275K |
|
|
ARBK
946
Argo Blockchain
ARBK
$17.9M
| $282K | ﹤0.01% |
28,612
+15,918
| +125% | +$157K |
|
947
Hims & Hers Health
HIMS
$10.8B
| $281K | ﹤0.01% |
52,842
-2,631
| -5% | -$14K |
|
|
OIL
948
DELISTED
iPath Pure Beta Crude Oil ETN
OIL
| $281K | ﹤0.01% |
8,732
-7,240
| -45% | -$233K |
|
949
iShares MSCI Chile ETF
ECH
$705M
| $280K | ﹤0.01% |
9,652
-44,779
| -82% | -$1.3M |
|
950
Fox Class B
FOX
$23.1B
| $280K | ﹤0.01% |
7,745
-1,503
| -16% | -$54.3K |
|