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
|
+$216M |
| 2 |
Apple
AAPL
|
+$159M |
| 3 |
Broadcom
AVGO
|
+$128M |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$141M |
| 2 |
Amazon
AMZN
|
+$53.1M |
| 3 |
TSMC
TSM
|
+$45.7M |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
926
Ultra Clean Holdings
UCTT
$1.14B
| $200K | ﹤0.01% |
8,889
-1,372
| -13% | -$30.9K |
|
927
Solid Power
SLDP
$683M
| $199K | ﹤0.01% |
91,130
+62,853
| +222% | +$137K |
|
928
BuzzFeed
BZFD
$73.7M
| $198K | ﹤0.01% |
99,000
+45,238
| +84% | +$90.5K |
|
929
International Paper
IP
$24.4B
| $198K | ﹤0.01% |
+4,232
| New | +$198K |
|
930
TXO Partners LP
TXO
$751M
| $198K | ﹤0.01% |
+13,192
| New | +$198K |
|
931
Gevo
GEVO
$404M
| $197K | ﹤0.01% |
149,533
+143,897
| +2,553% | +$190K |
|
932
Sun Communities
SUI
$16.2B
| $197K | ﹤0.01% |
1,560
+1,050
| +206% | +$133K |
|
|
CRESY
933
Cresud
CRESY
$541M
| $196K | ﹤0.01% |
18,303
-626
| -3% | -$6.7K |
|
934
CryoPort
CYRX
$485M
| $195K | ﹤0.01% |
26,254
+22,811
| +663% | +$169K |
|
935
Petrobras
PBR
$81.9B
| $195K | ﹤0.01% |
15,660
-468,283
| -97% | -$5.83M |
|
936
iShares 10-20 Year Treasury Bond ETF
TLH
$11.6B
| $195K | ﹤0.01% |
+1,922
| New | +$195K |
|
937
VEON
VEON
$3.75B
| $195K | ﹤0.01% |
4,247
-384
| -8% | -$17.6K |
|
938
Tandem Diabetes Care
TNDM
$849M
| $194K | ﹤0.01% |
10,434
+8,931
| +594% | +$166K |
|
939
Geron
GERN
$836M
| $193K | ﹤0.01% |
137,408
-52,613
| -28% | -$73.9K |
|
940
Lear
LEA
$5.87B
| $193K | ﹤0.01% |
+2,040
| New | +$193K |
|
941
Precigen
PGEN
$1.23B
| $193K | ﹤0.01% |
136,232
+105,814
| +348% | +$150K |
|
942
CONMED
CNMD
$1.65B
| $192K | ﹤0.01% |
3,687
-3,278
| -47% | -$171K |
|
943
Shoals Technologies Group
SHLS
$1.17B
| $192K | ﹤0.01% |
45,360
+33,059
| +269% | +$140K |
|
|
ETHT
944
ProShares Ultra Ether ETF
ETHT
$627M
| $192K | ﹤0.01% |
4,885
+4,586
| +1,534% | +$180K |
|
945
IES Holdings
IESC
$7.54B
| $191K | ﹤0.01% |
+645
| New | +$191K |
|
946
Harmony Gold Mining
HMY
$9.47B
| $190K | ﹤0.01% |
+13,663
| New | +$190K |
|
947
iShares Latin America 40 ETF
ILF
$1.81B
| $190K | ﹤0.01% |
7,279
+5,206
| +251% | +$136K |
|
948
Blink Charging
BLNK
$141M
| $189K | ﹤0.01% |
201,900
-14,930
| -7% | -$14K |
|
949
Spire Global
SPIR
$296M
| $189K | ﹤0.01% |
15,890
+7,318
| +85% | +$87K |
|
950
Acuity Brands
AYI
$10.3B
| $188K | ﹤0.01% |
+633
| New | +$188K |
|