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 | |
|---|---|---|---|---|---|---|
676
Churchill Downs
CHDN
$6.74B
| $402K | ﹤0.01% |
3,988
+3,035
| +318% | +$306K |
|
677
Acadia Pharmaceuticals
ACAD
$4.05B
| $401K | ﹤0.01% |
18,631
-63,318
| -77% | -$1.36M |
|
678
Rogers Corp
ROG
$1.43B
| $401K | ﹤0.01% |
5,863
-114
| -2% | -$7.8K |
|
679
T-Rex 2X Inverse Tesla Daily Target ETF
TSLZ
$66.9M
| $401K | ﹤0.01% |
243,037
+145,578
| +149% | +$240K |
|
680
Atmos Energy
ATO
$26.3B
| $399K | ﹤0.01% |
2,590
-3,725
| -59% | -$574K |
|
681
Chemours
CC
$2.45B
| $398K | ﹤0.01% |
34,843
+20,834
| +149% | +$238K |
|
682
Direxion Daily Aerospace & Defense Bull 3X Shares
DFEN
$324M
| $398K | ﹤0.01% |
+7,678
| New | +$398K |
|
683
Madison Square Garden
MSGS
$4.94B
| $398K | ﹤0.01% |
1,906
+1,851
| +3,365% | +$387K |
|
684
CoreCivic
CXW
$2.18B
| $396K | ﹤0.01% |
+18,808
| New | +$396K |
|
685
Xerox
XRX
$462M
| $396K | ﹤0.01% |
75,276
+36,719
| +95% | +$193K |
|
|
HIVE
686
HIVE Digital Technologies
HIVE
$712M
| $395K | ﹤0.01% |
219,772
+88,631
| +68% | +$159K |
|
687
Exact Sciences
EXAS
$10.3B
| $394K | ﹤0.01% |
+7,427
| New | +$394K |
|
688
SharpLink Gaming
SBET
$3.25B
| $393K | ﹤0.01% |
+39,608
| New | +$393K |
|
689
iShares MSCI Chile ETF
ECH
$708M
| $391K | ﹤0.01% |
12,441
+12,294
| +8,363% | +$386K |
|
690
Array Technologies
ARRY
$1.27B
| $389K | ﹤0.01% |
+66,031
| New | +$389K |
|
691
Medpace
MEDP
$13.3B
| $388K | ﹤0.01% |
1,238
+594
| +92% | +$186K |
|
692
Altimmune
ALT
$326M
| $386K | ﹤0.01% |
99,967
+79,146
| +380% | +$306K |
|
693
Community Health Systems
CYH
$404M
| $385K | ﹤0.01% |
113,312
+6,741
| +6% | +$22.9K |
|
|
KLC
694
KinderCare Learning Companies, Inc.
KLC
$853M
| $385K | ﹤0.01% |
38,166
+12,101
| +46% | +$122K |
|
695
iShares Select Dividend ETF
DVY
$20.5B
| $381K | ﹤0.01% |
2,870
+1,057
| +58% | +$140K |
|
696
YieldMax Ultra Option Income Strategy ETF
ULTY
$3.2B
| $379K | ﹤0.01% |
+60,173
| New | +$379K |
|
|
MNTN
697
MNTN, Inc.
MNTN
$1.44B
| $378K | ﹤0.01% |
+17,302
| New | +$378K |
|
698
nCino
NCNO
$3.53B
| $377K | ﹤0.01% |
13,497
+6,184
| +85% | +$173K |
|
|
DNB
699
DELISTED
Dun & Bradstreet
DNB
| $376K | ﹤0.01% |
41,437
-59,474
| -59% | -$540K |
|
|
SVC
700
Service Properties Trust
SVC
$472M
| $376K | ﹤0.01% |
157,562
+108,620
| +222% | +$259K |
|