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
|
+$258M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$75.7M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$67.2M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$59.4M |
| 5 |
Intel
INTC
|
+$45.8M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$56.8M |
| 2 |
iShares Silver Trust
SLV
|
+$45.9M |
| 3 |
Ford
F
|
+$32.5M |
| 4 |
Exxon Mobil
XOM
|
+$20.4M |
| 5 |
Caterpillar
CAT
|
+$19.2M |
Sector Composition
| 1 | Technology | 26.01% |
| 2 | Consumer Discretionary | 9.82% |
| 3 | Communication Services | 9.82% |
| 4 | Financials | 8.68% |
| 5 | Healthcare | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
976
Alpha and Omega Semiconductor
AOSL
$875M
| $150K | ﹤0.01% |
4,521
-6,051
| -57% | -$201K |
|
977
Skywest
SKYW
$4.41B
| $150K | ﹤0.01% |
7,071
-1,364
| -16% | -$28.9K |
|
978
Sundial Growers
SNDL
$615M
| $150K | ﹤0.01% |
46,074
+15,833
| +52% | +$51.5K |
|
979
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$13.1B
| $150K | ﹤0.01% |
11,517
-170,920
| -94% | -$2.23M |
|
980
Synaptics
SYNA
$2.76B
| $150K | ﹤0.01% |
1,274
+934
| +275% | +$110K |
|
981
Vanguard Mid-Cap ETF
VO
$88.6B
| $149K | ﹤0.01% |
+761
| New | +$149K |
|
|
PLYA
982
DELISTED
Playa Hotels & Resorts
PLYA
| $148K | ﹤0.01% |
21,623
-20,394
| -49% | -$140K |
|
983
Gores Guggenheim
PSNY
$2.05B
| $148K | ﹤0.01% |
+16,902
| New | +$148K |
|
984
Ubiquiti
UI
$37.1B
| $148K | ﹤0.01% |
+597
| New | +$148K |
|
|
JJM
985
DELISTED
iPath Series B Bloomberg Industrial Metals Subindex Total ReturnSM ETN
JJM
| $148K | ﹤0.01% |
2,632
+800
| +44% | +$45K |
|
986
CorMedix
CRMD
$977M
| $147K | ﹤0.01% |
36,732
+25,554
| +229% | +$102K |
|
987
Direxion Daily Real Estate Bear 3X Shares
DRV
$40.9M
| $147K | ﹤0.01% |
+2,925
| New | +$147K |
|
|
SII
988
Sprott
SII
$1.78B
| $147K | ﹤0.01% |
4,253
-8,674
| -67% | -$300K |
|
989
Altice USA
ATUS
$1.14B
| $146K | ﹤0.01% |
+15,837
| New | +$146K |
|
990
American Vanguard Corp
AVD
$159M
| $146K | ﹤0.01% |
6,537
+64
| +1% | +$1.43K |
|
991
Cardiff Oncology
CRDF
$138M
| $146K | ﹤0.01% |
66,545
+40,038
| +151% | +$87.8K |
|
|
HLTH
992
DELISTED
Cue Health Inc. Common Stock
HLTH
| $146K | ﹤0.01% |
+45,818
| New | +$146K |
|
|
ARBK
993
Argo Blockchain
ARBK
$20M
| $145K | ﹤0.01% |
38,722
+10,110
| +35% | +$37.9K |
|
994
Great Lakes Dredge & Dock
GLDD
$834M
| $145K | ﹤0.01% |
11,084
+7,746
| +232% | +$101K |
|
995
ProShares UltraShort Bloomberg Crude Oil
SCO
$125M
| $145K | ﹤0.01% |
6,338
-5,644
| -47% | -$129K |
|
996
American Financial Group
AFG
$11.7B
| $144K | ﹤0.01% |
+1,043
| New | +$144K |
|
997
ARK Space Exploration & Innovation ETF
ARKX
$403M
| $144K | ﹤0.01% |
10,790
-2,801
| -21% | -$37.4K |
|
998
Kulicke & Soffa
KLIC
$2.03B
| $144K | ﹤0.01% |
3,386
-8,599
| -72% | -$366K |
|
|
MVO
999
MV Oil Trust
MVO
$69.7M
| $144K | ﹤0.01% |
12,867
+12,284
| +2,107% | +$137K |
|
|
PGRU
1000
DELISTED
PropertyGuru Group Limited
PGRU
| $144K | ﹤0.01% |
+32,143
| New | +$144K |
|