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 |
Tesla
TSLA
|
+$27.1M |
| 2 |
Netflix
NFLX
|
+$24.7M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.1M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$14.8M |
Top Sells
| 1 |
Amazon
AMZN
|
+$71.9M |
| 2 |
Micron Technology
MU
|
+$47.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Boeing
BA
|
+$21M |
| 5 |
Citigroup
C
|
+$19.6M |
Sector Composition
| 1 | Consumer Discretionary | 15.64% |
| 2 | Communication Services | 14.16% |
| 3 | Technology | 12.46% |
| 4 | Financials | 10.94% |
| 5 | Healthcare | 10.33% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
MNTA
551
DELISTED
Momenta Pharmaceuticals, Inc.
MNTA
| $270K | 0.01% |
14,907
+4,288
| +40% | +$77.7K |
|
552
Cenovus Energy
CVE
$30.7B
| $269K | 0.01% |
31,548
+7,690
| +32% | +$65.6K |
|
553
Vanguard Mega Cap 300 Index ETF
MGC
$7.78B
| $268K | 0.01% |
+2,963
| New | +$268K |
|
554
US Foods
USFD
$17.5B
| $268K | 0.01% |
8,198
-12,591
| -61% | -$412K |
|
555
Gerdau
GGB
$6.19B
| $267K | 0.01% |
72,230
+36,741
| +104% | +$136K |
|
556
PBF Energy
PBF
$3.26B
| $267K | 0.01% |
+7,894
| New | +$267K |
|
|
FPRX
557
DELISTED
Five Prime Therapeutics, Inc.
FPRX
| $267K | 0.01% |
+15,554
| New | +$267K |
|
558
IDEX
IEX
$12.1B
| $266K | 0.01% |
+1,870
| New | +$266K |
|
559
Intercontinental Exchange
ICE
$98.6B
| $265K | 0.01% |
+3,667
| New | +$265K |
|
560
LiveRamp
RAMP
$1.74B
| $264K | 0.01% |
11,637
-715
| -6% | -$16.2K |
|
561
Marriott Vacations Worldwide
VAC
$2.64B
| $264K | 0.01% |
1,983
-2,592
| -57% | -$345K |
|
562
British American Tobacco
BTI
$123B
| $263K | 0.01% |
+4,573
| New | +$263K |
|
563
Enova International
ENVA
$2.88B
| $263K | 0.01% |
11,946
+8,066
| +208% | +$178K |
|
|
FLOW
564
DELISTED
SPX FLOW, Inc.
FLOW
| $263K | 0.01% |
+5,364
| New | +$263K |
|
565
National Grid
NGG
$70.1B
| $261K | 0.01% |
5,175
-767
| -13% | -$38.7K |
|
566
Gen Digital
GEN
$18B
| $260K | 0.01% |
10,090
-8,639
| -46% | -$223K |
|
567
Invesco CurrencyShares Swiss Franc Trust
FXF
$377M
| $259K | 0.01% |
2,636
-4,696
| -64% | -$461K |
|
568
Camtek
CAMT
$3.71B
| $258K | 0.01% |
38,364
-9,882
| -20% | -$66.5K |
|
|
BWP
569
DELISTED
Boardwalk Pipeline Partners
BWP
| $258K | 0.01% |
+25,467
| New | +$258K |
|
570
Waste Management
WM
$87.7B
| $257K | 0.01% |
3,063
-6,239
| -67% | -$523K |
|
571
JD.com
JD
$47.2B
| $256K | 0.01% |
6,343
-335,823
| -98% | -$13.6M |
|
572
Invesco S&P 500 Equal Weight ETF
RSP
$74.2B
| $256K | 0.01% |
2,583
+2,500
| +3,012% | +$248K |
|
573
MSCI
MSCI
$43.6B
| $255K | 0.01% |
1,711
+1,270
| +288% | +$189K |
|
574
ProShares Ultra FTSE China 50 of PROSHARES TRUST
XPP
$19.4M
| $255K | 0.01% |
+2,994
| New | +$255K |
|
|
QD
575
Qudian
QD
$680M
| $254K | 0.01% |
21,741
-1,243
| -5% | -$14.5K |
|