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 | |
|---|---|---|---|---|---|---|
1101
Fortinet
FTNT
$112B
| $250K | 0.01% |
+23,340
| New | +$227K |
|
|
MVO
1102
MV Oil Trust
MVO
$6.85M
| $250K | 0.01% |
31,813
-3,510
| -10% | -$28K |
|
1103
PUT
NOV
NOV
$7.45B
| $250K | 0.01% |
332
+19
| +6% | +$697 |
|
1104
PUT
DuPont de Nemours
DD
$18.6B
| $249K | 0.01% |
514
-790
| -61% | -$143K |
|
1105
PUT
Cencora
COR
$60.3B
| $247K | 0.01% |
275
-500
| -65% | -$48K |
|
1106
PUT
Campbell Soup
CPB
$6.51B
| $246K | 0.01% |
826
+296
| +56% | +$13.3K |
|
|
TFCFA
1107
DELISTED
Twenty-First Century Fox, Inc. Class A
TFCFA
| $246K | 0.01% |
+6,705
| New | +$248K |
|
|
GRA
1108
DELISTED
W.R. Grace & Co.
GRA
| $245K | 0.01% |
4,013
-9,857
| -71% | -$676K |
|
1109
CALL
Universal Display
OLED
$3.71B
| $244K | 0.01% |
1,477
+187
| +14% | +$28.1K |
|
1110
CALL
Protolabs
PRLB
$1.86B
| $244K | 0.01% |
112
-29
| -21% | -$3.28K |
|
1111
PUT
Skyworks Solutions
SWKS
$9.06B
| $243K | 0.01% |
614
-685
| -53% | -$71.2K |
|
|
OPB
1112
DELISTED
Opus Bank Common Stock
OPB
| $243K | 0.01% |
+8,680
| New | +$245K |
|
|
ETP
1113
PUT
DELISTED
Energy Transfer Partners, L.P.
ETP
| $243K | 0.01% |
474
-525
| -53% | -$9.75K |
|
|
DFS
1114
DELISTED
Discover Financial Services
DFS
| $242K | 0.01% |
3,375
-9,695
| -74% | -$748K |
|
|
ACH
1115
Accendra Health
ACH
$240M
| $242K | 0.01% |
15,625
+2,723
| +21% | +$48.6K |
|
1116
CALL
Ciena
CIEN
$55.3B
| $241K | 0.01% |
845
+550
| +186% | +$12.9K |
|
1117
PUT
TAL Education Group
TAL
$5.71B
| $241K | 0.01% |
1,009
-622
| -38% | -$21.3K |
|
1118
CALL
United Rentals
URI
$71.1B
| $241K | 0.01% |
220
-312
| -59% | -$55.4K |
|
|
SAVE
1119
CALL
DELISTED
Spirit Airlines, Inc.
SAVE
| $241K | 0.01% |
6,380
+6,174
| +2,997% | +$259K |
|
1120
CALL
Fluor
FLR
$7.29B
| $240K | 0.01% |
773
+481
| +165% | +$27.6K |
|
|
HES
1121
CALL
DELISTED
Hess
HES
| $240K | 0.01% |
522
-1,013
| -66% | -$49.6K |
|
|
TECD
1122
DELISTED
Tech Data Corp
TECD
| $240K | 0.01% |
+2,822
| New | +$274K |
|
1123
CALL
BP
BP
$113B
| $239K | 0.01% |
2,035
+1,464
| +256% | +$55.2K |
|
1124
Canadian Solar
CSIQ
$906M
| $239K | 0.01% |
14,741
-18,908
| -56% | -$304K |
|
|
DVAX
1125
CALL
DELISTED
Dynavax Technologies
DVAX
| $239K | 0.01% |
5,564
+4,725
| +563% | +$81.6K |
|
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.