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 |
Amazon
AMZN
|
+$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$26.1M |
| 4 |
Booking.com
BKNG
|
+$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$42.8M |
| 2 |
Amgen
AMGN
|
+$32.3M |
| 3 |
Baidu
BIDU
|
+$21.9M |
| 4 |
Micron Technology
MU
|
+$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
+$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
551
CRA International
CRAI
$1.28B
| $280K | 0.01% |
6,837
-11,990
| -64% | -$491K |
|
552
SBA Communications
SBAC
$20.7B
| $280K | 0.01% |
1,946
-1,593
| -45% | -$229K |
|
553
SiriusXM
SIRI
$8.08B
| $277K | 0.01% |
5,027
+4,694
| +1,410% | +$259K |
|
554
WEC Energy
WEC
$35.1B
| $274K | 0.01% |
+4,379
| New | +$274K |
|
555
State Street
STT
$31.7B
| $272K | 0.01% |
+2,849
| New | +$272K |
|
556
BorgWarner
BWA
$9.3B
| $271K | 0.01% |
+6,019
| New | +$271K |
|
557
Dell
DELL
$85.1B
| $271K | 0.01% |
12,511
-10
| -0.1% | -$217 |
|
558
Nu Skin
NUS
$568M
| $271K | 0.01% |
+4,409
| New | +$271K |
|
|
DQ
559
Daqo New Energy
DQ
$1.78B
| $270K | 0.01% |
46,575
+9,550
| +26% | +$55.4K |
|
|
CHUY
560
DELISTED
Chuy's Holdings, Inc. Common Stock
CHUY
| $270K | 0.01% |
+12,862
| New | +$270K |
|
561
Seres Therapeutics
MCRB
$167M
| $267K | 0.01% |
+834
| New | +$267K |
|
562
Sabra Healthcare REIT
SBRA
$4.61B
| $267K | 0.01% |
+12,201
| New | +$267K |
|
|
SHLX
563
DELISTED
Shell Midstream Partners, L.P.
SHLX
| $266K | 0.01% |
9,582
+3,628
| +61% | +$101K |
|
|
CMD
564
DELISTED
Cantel Medical Corporation
CMD
| $265K | 0.01% |
2,824
+1,840
| +187% | +$173K |
|
565
WisdomTree
WT
$2.03B
| $263K | 0.01% |
25,874
+21,631
| +510% | +$220K |
|
|
COUP
566
DELISTED
Coupa Software Incorporated
COUP
| $263K | 0.01% |
+8,446
| New | +$263K |
|
567
Ventas
VTR
$31.6B
| $261K | 0.01% |
+4,019
| New | +$261K |
|
568
Cboe Global Markets
CBOE
$24.4B
| $260K | 0.01% |
2,422
-4,703
| -66% | -$505K |
|
569
Hyatt Hotels
H
$13.6B
| $260K | 0.01% |
4,211
-10,531
| -71% | -$650K |
|
570
Liberty Latin America Class A
LILA
$1.53B
| $260K | 0.01% |
11,633
+1,638
| +16% | +$36.6K |
|
571
QuidelOrtho
QDEL
$1.91B
| $256K | 0.01% |
5,845
+5,457
| +1,406% | +$239K |
|
572
Wabtec
WAB
$32.8B
| $254K | 0.01% |
+3,366
| New | +$254K |
|
573
Assembly Biosciences
ASMB
$178M
| $251K | 0.01% |
599
-436
| -42% | -$183K |
|
574
Texas Capital Bancshares
TCBI
$3.98B
| $251K | 0.01% |
2,936
+2,873
| +4,560% | +$246K |
|
575
United States Gasoline Fund
UGA
$78.1M
| $250K | 0.01% |
+8,890
| New | +$250K |
|