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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Tesla
TSLA
|
+$33.5M |
| 2 |
Netflix
NFLX
|
+$22.8M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.9M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$15.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$71.1M |
| 2 |
Micron Technology
MU
|
+$43.8M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Booking.com
BKNG
|
+$22.2M |
| 5 |
Boeing
BA
|
+$21.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 7.87% |
| 2 | Communication Services | 7.14% |
| 3 | Technology | 6.23% |
| 4 | Financials | 5.5% |
| 5 | Healthcare | 5.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1076
National Grid
NGG
$82.7B
| $261K | 0.01% |
5,249
-778
| -13% | -$38K |
|
|
WLL
1077
CALL
DELISTED
Whiting Petroleum Corporation
WLL
| $261K | 0.01% |
21
+16
| +320% | +$34.3K |
|
1078
Gen Digital
GEN
$15.6B
| $260K | 0.01% |
10,090
-8,639
| -46% | -$235K |
|
1079
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
| $259K | 0.01% |
2,636
-4,696
| -64% | -$467K |
|
|
CNSL
1080
PUT
DELISTED
Consolidated Communications Holdings, Inc.
CNSL
| $259K | 0.01% |
680
+331
| +95% | +$3.97K |
|
|
SCG
1081
PUT
DELISTED
Scana
SCG
| $259K | 0.01% |
1,282
+146
| +13% | +$5.85K |
|
1082
Camtek
CAMT
$6.9B
| $258K | 0.01% |
38,364
-9,882
| -20% | -$65.8K |
|
1083
PUT
Nordic American Tanker
NAT
$1.37B
| $258K | 0.01% |
610
-347
| -36% | -$795 |
|
|
BWP
1084
DELISTED
Boardwalk Pipeline Partners
BWP
| $258K | 0.01% |
+25,467
| New | +$302K |
|
1085
CALL
Humana
HUM
$46.7B
| $257K | 0.01% |
124
-126
| -50% | -$34.1K |
|
1086
CALL
Intuit
INTU
$81.1B
| $257K | 0.01% |
523
+288
| +123% | +$48.5K |
|
1087
Waste Management
WM
$95.9B
| $257K | 0.01% |
3,063
-6,239
| -67% | -$535K |
|
1088
JD.com
JD
$40.8B
| $256K | 0.01% |
6,343
-335,823
| -98% | -$15.2M |
|
1089
Invesco S&P 500 Equal Weight ETF
RSP
$96.1B
| $256K | 0.01% |
2,583
+2,500
| +3,012% | +$256K |
|
1090
PUT
Alaska Air
ALK
$5.15B
| $255K | 0.01% |
633
+1
| +0.2% | +$66 |
|
1091
MSCI
MSCI
$40B
| $255K | 0.01% |
1,711
+1,270
| +288% | +$182K |
|
1092
CALL
United States Natural Gas Fund
UNG
$470M
| $255K | 0.01% |
665
+627
| +1,650% | +$58.4K |
|
1093
ProShares Ultra FTSE China 50 of PROSHARES TRUST
XPP
$8.8M
| $255K | 0.01% |
+2,994
| New | +$281K |
|
|
HTT
1094
High Templar Tech Ltd
HTT
$377M
| $254K | 0.01% |
21,741
-1,243
| -5% | -$16.9K |
|
1095
CALL
American Eagle Outfitters
AEO
$2.85B
| $253K | 0.01% |
897
+664
| +285% | +$12.4K |
|
1096
Cal-Maine
CALM
$4.28B
| $253K | 0.01% |
5,807
+3,298
| +131% | +$143K |
|
1097
Dominion Energy
D
$62.5B
| $252K | 0.01% |
+3,743
| New | +$276K |
|
1098
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $252K | 0.01% |
3,296
+2,284
| +226% | +$178K |
|
1099
CALL
Emerson Electric
EMR
$82.9B
| $251K | 0.01% |
444
-473
| -52% | -$33.7K |
|
1100
Alarm.com
ALRM
$2.56B
| $250K | 0.01% |
6,645
-1,002
| -13% | -$37.8K |
|
Similar funds
Simplex Trading's Q1 2018 Portfolio in Review
As of Q1 2018, Simplex Trading held 7,591 positions worth $2.27B, down 2.1% from $2.32B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $210M in Q1 2018, closing 1,502 positions and reducing 2,267 holdings. Its most notable exit was Alphabet (Google) Class C, an estimated $26.3M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 7.9% of assets, down from 11% a quarter earlier, followed by Communication Services and Technology.
Against the trend, Simplex Trading opened a new position in Tesla worth $27.1M.
- Simplex Trading's largest Q1 2018 buy was Tesla: 1,525,035 shares worth $27.1M.
- Simplex Trading added most to Netflix in Q1 2018, an estimated $22.8M increase.
- Simplex Trading's biggest Q1 2018 reduction was Amazon, cutting an estimated $71.1M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2018, selling an estimated $26.3M.
- Simplex Trading's ten largest holdings make up 18% of its $2.27B portfolio in Q1 2018.
- Simplex Trading opened 1,643 new positions and closed 1,502 in Q1 2018.
- Simplex Trading's portfolio value fell 2.1% quarter-over-quarter to $2.27B.
Based on Simplex Trading's 13F filing for Q1 2018, filed 26 Apr 2018.