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 |
Goldman Sachs
GS
|
+$38.4M |
| 2 |
Micron Technology
MU
|
+$23.7M |
| 3 |
NVIDIA
NVDA
|
+$23.6M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Top Sells
| 1 |
Citigroup
C
|
+$21.6M |
| 2 |
Apple
AAPL
|
+$17.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$13.3M |
| 4 |
Eli Lilly
LLY
|
+$9.69M |
| 5 |
Mastercard
MA
|
+$8.27M |
Sector Composition
| 1 | Technology | 14.2% |
| 2 | Communication Services | 13.46% |
| 3 | Consumer Discretionary | 12.76% |
| 4 | Healthcare | 12.43% |
| 5 | Financials | 10.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
601
BCE
BCE
$21.6B
| $293K | 0.01% |
6,627
-7,751
| -54% | -$343K |
|
|
ENDP
602
DELISTED
Endo International plc
ENDP
| $293K | 0.01% |
+26,268
| New | +$293K |
|
603
ProShares UltraShort QQQ
QID
$290M
| $292K | 0.01% |
192
+63
| +49% | +$95.8K |
|
|
TMX
604
DELISTED
Terminix Global Holdings, Inc.
TMX
| $290K | 0.01% |
+10,393
| New | +$290K |
|
605
Unum
UNM
$13B
| $289K | 0.01% |
+6,170
| New | +$289K |
|
|
SC
606
DELISTED
SANTANDER CONSUMER USA HOLDINGS INC
SC
| $288K | 0.01% |
+21,648
| New | +$288K |
|
|
HSTO
607
DELISTED
Histogen Inc. Common Stock
HSTO
| $286K | 0.01% |
+248
| New | +$286K |
|
|
YHOO
608
DELISTED
Yahoo Inc
YHOO
| $284K | 0.01% |
+6,123
| New | +$284K |
|
609
Ambarella
AMBA
$3.53B
| $280K | 0.01% |
+5,135
| New | +$280K |
|
|
IMMU
610
DELISTED
Immunomedics Inc
IMMU
| $278K | 0.01% |
43,115
+31,523
| +272% | +$203K |
|
|
STI
611
DELISTED
SunTrust Banks, Inc.
STI
| $277K | 0.01% |
+5,020
| New | +$277K |
|
612
Adeia
ADEA
$1.81B
| $276K | 0.01% |
30,799
+23,628
| +329% | +$212K |
|
613
American Vanguard Corp
AVD
$164M
| $276K | 0.01% |
+16,663
| New | +$276K |
|
|
ENV
614
DELISTED
ENVESTNET, INC.
ENV
| $275K | 0.01% |
+8,532
| New | +$275K |
|
615
Criteo
CRTO
$1.16B
| $273K | 0.01% |
+5,472
| New | +$273K |
|
|
HES
616
DELISTED
Hess
HES
| $273K | 0.01% |
5,673
-41,906
| -88% | -$2.02M |
|
|
CHK
617
DELISTED
Chesapeake Energy Corporation
CHK
| $273K | 0.01% |
230
+174
| +311% | +$207K |
|
|
HABT
618
DELISTED
The Habit Restaurants, Inc. - Class A
HABT
| $273K | 0.01% |
15,424
+3,522
| +30% | +$62.3K |
|
619
Chemours
CC
$2.63B
| $272K | 0.01% |
+7,079
| New | +$272K |
|
620
Deere & Co
DE
$128B
| $271K | 0.01% |
+2,493
| New | +$271K |
|
|
DNR
621
DELISTED
Denbury Resources, Inc.
DNR
| $271K | 0.01% |
105,296
+89,735
| +577% | +$231K |
|
|
LXFT
622
DELISTED
Luxoft Holding, Inc.
LXFT
| $270K | 0.01% |
4,321
+4,239
| +5,170% | +$265K |
|
|
GNCMA
623
DELISTED
GCI Liberty, Inc. Class A-1 Common Stock
GNCMA
| $270K | 0.01% |
+12,983
| New | +$270K |
|
624
Global X SuperDividend ETF
SDIV
$988M
| $269K | 0.01% |
4,190
+2,651
| +172% | +$170K |
|
|
IXYS
625
DELISTED
IXYS Corp
IXYS
| $269K | 0.01% |
18,531
+18,292
| +7,654% | +$266K |
|