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 | |
|---|---|---|---|---|---|---|
|
LFIN
2676
DELISTED
LongFin Corp Class A Common Stock
LFIN
| $40K | ﹤0.01% |
+2,349
| New | +$98.9K |
|
2677
PUT
Analog Devices
ADI
$181B
| $39K | ﹤0.01% |
218
-1,222
| -85% | -$111K |
|
2678
Airgain
AIRG
$72.8M
| $39K | ﹤0.01% |
5,069
+1,857
| +58% | +$17.3K |
|
|
BGFV
2679
CALL
DELISTED
Big 5 Sporting Goods
BGFV
| $39K | ﹤0.01% |
466
+364
| +357% | +$2.3K |
|
2680
PUT
Baker Hughes
BKR
$60.1B
| $39K | ﹤0.01% |
118
-263
| -69% | -$8.04K |
|
2681
CALL
Carnival Corporation Ltd
CCL
$37.1B
| $39K | ﹤0.01% |
587
+176
| +43% | +$12K |
|
|
CIM
2682
Chimera Investment
CIM
$1.05B
| $39K | ﹤0.01% |
750
+489
| +187% | +$25.6K |
|
|
EVRI
2683
DELISTED
Everi Holdings
EVRI
| $39K | ﹤0.01% |
5,958
+489
| +9% | +$3.64K |
|
2684
Fox Factory Holding Corp
FOXF
$779M
| $39K | ﹤0.01% |
1,122
-3,941
| -78% | -$150K |
|
2685
PUT
Fortinet
FTNT
$112B
| $39K | ﹤0.01% |
975
-1,745
| -64% | -$17K |
|
2686
CALL
Fortive
FTV
$19.2B
| $39K | ﹤0.01% |
469
+185
| +65% | +$8.8K |
|
2687
CALL
Helmerich & Payne
HP
$3.36B
| $39K | ﹤0.01% |
158
-6
| -4% | -$405 |
|
2688
CALL
Louisiana-Pacific
LPX
$5.19B
| $39K | ﹤0.01% |
425
+331
| +352% | +$9.49K |
|
2689
CALL
Live Nation Entertainment
LYV
$41.7B
| $39K | ﹤0.01% |
414
+176
| +74% | +$7.81K |
|
2690
CALL
MiMedx Group
MDXG
$635M
| $39K | ﹤0.01% |
1,077
+980
| +1,010% | +$11.4K |
|
2691
CALL
Omeros
OMER
$821M
| $39K | ﹤0.01% |
666
+472
| +243% | +$6.63K |
|
2692
CALL
Rambus
RMBS
$10.4B
| $39K | ﹤0.01% |
1,036
+637
| +160% | +$8.53K |
|
2693
CALL
Southern Copper
SCCO
$141B
| $39K | ﹤0.01% |
118
+9
| +8% | +$426 |
|
|
SFIX
2694
PUT
Stitch Fix
SFIX
$536M
| $39K | ﹤0.01% |
192
+155
| +419% | +$3.36K |
|
2695
PUT
Spectrum Brands
SPB
$2.04B
| $39K | ﹤0.01% |
176
-86
| -33% | -$9.25K |
|
2696
PUT
S&P Global
SPGI
$130B
| $39K | ﹤0.01% |
343
+278
| +428% | +$51.3K |
|
|
TMQ
2697
PUT
Trilogy Metals
TMQ
$536M
| $39K | ﹤0.01% |
100
| – | – |
|
2698
CALL
Voya Financial
VOYA
$8.98B
| $39K | ﹤0.01% |
254
-21
| -8% | -$1.08K |
|
|
VRNT
2699
CALL
DELISTED
Verint Systems
VRNT
| $39K | ﹤0.01% |
316
+108
| +52% | +$2.22K |
|
|
COUP
2700
CALL
DELISTED
Coupa Software Incorporated
COUP
| $39K | ﹤0.01% |
82
-39
| -32% | -$1.6K |
|
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.