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
|
+$60M |
| 2 |
Microsoft
MSFT
|
+$58.6M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.5M |
| 4 |
PayPal
PYPL
|
+$40.9M |
| 5 |
Netflix
NFLX
|
+$29.7M |
Top Sells
| 1 |
Apple
AAPL
|
+$48.7M |
| 2 |
Walmart
WMT
|
+$45.2M |
| 3 |
Adobe
ADBE
|
+$40.6M |
| 4 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 5 |
Enphase Energy
ENPH
|
+$27.2M |
Sector Composition
| 1 | Technology | 21.17% |
| 2 | Healthcare | 10.87% |
| 3 | Consumer Discretionary | 10.73% |
| 4 | Communication Services | 10.55% |
| 5 | Financials | 7.54% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
776
Casella Waste Systems
CWST
$5.86B
| $238K | ﹤0.01% |
+2,639
| New | +$238K |
|
777
Fortinet
FTNT
$61.5B
| $238K | ﹤0.01% |
3,150
| – | – |
|
778
Grifois
GRFS
$6.86B
| $238K | ﹤0.01% |
26,049
-131
| -0.5% | -$1.2K |
|
779
IAMGOLD
IAG
$6.25B
| $235K | ﹤0.01% |
89,458
+48,393
| +118% | +$127K |
|
780
Hims & Hers Health
HIMS
$11.3B
| $234K | ﹤0.01% |
24,894
-99,195
| -80% | -$932K |
|
781
MarineMax
HZO
$558M
| $234K | ﹤0.01% |
+6,873
| New | +$234K |
|
782
Avita Medical
RCEL
$116M
| $234K | ﹤0.01% |
13,796
+11,951
| +648% | +$203K |
|
783
GDS Holdings
GDS
$7.06B
| $233K | ﹤0.01% |
21,203
+14,402
| +212% | +$158K |
|
|
KC
784
Kingsoft Cloud Holdings
KC
$4.5B
| $232K | ﹤0.01% |
+38,110
| New | +$232K |
|
785
Everest Group
EG
$14.4B
| $231K | ﹤0.01% |
+676
| New | +$231K |
|
786
CarGurus
CARG
$3.56B
| $230K | ﹤0.01% |
+10,205
| New | +$230K |
|
787
EVgo
EVGO
$536M
| $230K | ﹤0.01% |
57,523
-2,319
| -4% | -$9.27K |
|
788
Lattice Semiconductor
LSCC
$9.12B
| $229K | ﹤0.01% |
+2,392
| New | +$229K |
|
789
ProShares Short Russell2000
RWM
$125M
| $228K | ﹤0.01% |
9,992
+8,174
| +450% | +$187K |
|
790
ProFrac Holding
ACDC
$713M
| $227K | ﹤0.01% |
+20,416
| New | +$227K |
|
791
Mitsubishi UFJ Financial
MUFG
$178B
| $226K | ﹤0.01% |
30,739
-3,799
| -11% | -$27.9K |
|
792
Vaalco Energy
EGY
$410M
| $225K | ﹤0.01% |
60,059
+23,239
| +63% | +$87.1K |
|
793
Lazard
LAZ
$5.38B
| $225K | ﹤0.01% |
+7,052
| New | +$225K |
|
794
Oric Pharmaceuticals
ORIC
$1.05B
| $225K | ﹤0.01% |
29,017
+28,630
| +7,398% | +$222K |
|
795
SS&C Technologies
SSNC
$21.9B
| $224K | ﹤0.01% |
3,702
-24,147
| -87% | -$1.46M |
|
796
iShares Broad USD High Yield Corporate Bond ETF
USHY
$25.2B
| $224K | ﹤0.01% |
6,372
+6,320
| +12,154% | +$222K |
|
|
TIGR
797
UP Fintech Holding
TIGR
$2.03B
| $221K | ﹤0.01% |
77,863
+77,698
| +47,090% | +$221K |
|
798
Brinker International
EAT
$6.92B
| $220K | ﹤0.01% |
6,037
+3,555
| +143% | +$130K |
|
|
SCPL
799
DELISTED
SciPlay Corporation Class A Common Stock
SCPL
| $220K | ﹤0.01% |
11,204
+10,729
| +2,259% | +$211K |
|
800
PDS Biotechnology
PDSB
$56.4M
| $217K | ﹤0.01% |
43,273
+30,994
| +252% | +$155K |
|