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 | |
|---|---|---|---|---|---|---|
676
ProShares UltraShort Yen
YCS
$30.6M
| $181K | 0.01% |
+9,784
| New | +$181K |
|
|
JOBS
677
DELISTED
51job, Inc.
JOBS
| $180K | 0.01% |
2,970
+2,243
| +309% | +$136K |
|
678
Main Street Capital
MAIN
$5.9B
| $180K | 0.01% |
4,532
+4,279
| +1,691% | +$170K |
|
679
Navient
NAVI
$1.35B
| $180K | 0.01% |
12,005
+1,287
| +12% | +$19.3K |
|
680
Direxion Daily S&P 500 Bear 3x Shares
SPXS
$436M
| $180K | 0.01% |
+498
| New | +$180K |
|
681
KB Financial Group
KB
$28.9B
| $179K | 0.01% |
3,654
+3,369
| +1,182% | +$165K |
|
682
Quantum Corp
QMCO
$106M
| $179K | 0.01% |
+1,466
| New | +$179K |
|
|
PX
683
DELISTED
Praxair Inc
PX
| $179K | 0.01% |
1,282
-2,619
| -67% | -$366K |
|
|
GNCMA
684
DELISTED
GCI Liberty, Inc. Class A-1 Common Stock
GNCMA
| $179K | 0.01% |
+4,405
| New | +$179K |
|
|
CARB
685
DELISTED
Carbonite Inc
CARB
| $177K | 0.01% |
8,058
+5,809
| +258% | +$128K |
|
|
TOUR
686
Tuniu
TOUR
$106M
| $176K | 0.01% |
22,607
+21,873
| +2,980% | +$170K |
|
687
Allison Transmission
ALSN
$7.52B
| $175K | 0.01% |
4,678
+4,304
| +1,151% | +$161K |
|
|
VER
688
DELISTED
VEREIT, Inc.
VER
| $175K | 0.01% |
4,230
+231
| +6% | +$9.56K |
|
689
Becton Dickinson
BDX
$54.9B
| $174K | 0.01% |
914
+754
| +471% | +$144K |
|
690
Manitowoc
MTW
$361M
| $174K | 0.01% |
4,838
+894
| +23% | +$32.2K |
|
|
FMSA
691
DELISTED
Fairmount Santrol Holdings Inc.
FMSA
| $174K | 0.01% |
36,435
-107,464
| -75% | -$513K |
|
|
ESV
692
DELISTED
Ensco Rowan plc
ESV
| $174K | 0.01% |
7,317
-8,013
| -52% | -$191K |
|
|
FRGI
693
DELISTED
Fiesta Restaurant Group, Inc.
FRGI
| $173K | 0.01% |
9,126
+8,082
| +774% | +$153K |
|
694
Hyster-Yale Materials Handling
HY
$665M
| $171K | 0.01% |
2,243
+1,252
| +126% | +$95.4K |
|
|
PRFT
695
DELISTED
Perficient Inc
PRFT
| $171K | 0.01% |
8,702
+8,502
| +4,251% | +$167K |
|
|
TCP
696
DELISTED
TC Pipelines LP
TCP
| $171K | 0.01% |
3,280
-195
| -6% | -$10.2K |
|
697
Murphy USA
MUSA
$7.55B
| $170K | 0.01% |
2,470
-4,542
| -65% | -$313K |
|
698
Papa John's
PZZA
$1.63B
| $170K | 0.01% |
2,334
+1,961
| +526% | +$143K |
|
|
RAD
699
DELISTED
Rite Aid Corporation
RAD
| $170K | 0.01% |
4,360
+2,835
| +186% | +$111K |
|
|
CAA
700
DELISTED
CalAtlantic Group, Inc.
CAA
| $170K | 0.01% |
4,668
+1,312
| +39% | +$47.8K |
|