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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
326
PUT
RH
RH
$3.31B
| $10.8M | 0.04% |
771
-86
| -10% | -$9.32K |
|
327
PUT
Capital One
COF
$124B
| $10.7M | 0.04% |
1,168
-163
| -12% | -$15.4K |
|
328
PUT
Take-Two Interactive
TTWO
$43.4B
| $10.7M | 0.04% |
902
+528
| +141% | +$57.5K |
|
329
CALL
Roku
ROKU
$21.2B
| $10.7M | 0.04% |
2,499
+1,425
| +133% | +$52K |
|
330
Applied Materials
AMAT
$440B
| $10.6M | 0.04% |
+230,449
| New | +$11.9M |
|
331
CALL
Intuit
INTU
$77.8B
| $10.6M | 0.04% |
521
-2
| -0.4% | -$384 |
|
332
PUT
W.W. Grainger
GWW
$63.9B
| $10.6M | 0.04% |
345
+74
| +27% | +$22.1K |
|
333
JPMorgan Chase
JPM
$926B
| $10.6M | 0.04% |
101,793
+16,974
| +20% | +$1.86M |
|
334
CALL
Shopify
SHOP
$154B
| $10.6M | 0.04% |
7,250
-169,670
| -96% | -$2.4M |
|
335
CALL
American International
AIG
$41.5B
| $10.6M | 0.04% |
1,990
+496
| +33% | +$26.8K |
|
336
CALL
ConocoPhillips
COP
$145B
| $10.5M | 0.04% |
1,511
-219
| -13% | -$14.6K |
|
337
Qualcomm
QCOM
$185B
| $10.5M | 0.04% |
187,037
-21,967
| -11% | -$1.23M |
|
338
PUT
Thermo Fisher Scientific
TMO
$196B
| $10.4M | 0.04% |
504
+72
| +17% | +$15.3K |
|
339
PUT
Verizon
VZ
$185B
| $10.4M | 0.04% |
2,059
-650
| -24% | -$31.5K |
|
340
CALL
Bunge Global
BG
$24B
| $10.3M | 0.04% |
1,478
-39
| -3% | -$2.79K |
|
|
UCD
341
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $10.2M | 0.04% |
6,898
+938
| +16% | +$1.38M |
|
342
PUT
Universal Display
OLED
$3.81B
| $10.1M | 0.04% |
1,174
-114
| -9% | -$10.9K |
|
343
CALL
lululemon athletica
LULU
$12.9B
| $9.99M | 0.04% |
800
-432
| -35% | -$46.1K |
|
344
PUT
Sarepta Therapeutics
SRPT
$1.67B
| $9.98M | 0.04% |
755
+680
| +907% | +$64.1K |
|
|
CELG
345
DELISTED
Celgene Corp
CELG
| $9.98M | 0.04% |
125,658
+31,934
| +34% | +$2.65M |
|
346
PUT
Marriott International
MAR
$97.5B
| $9.98M | 0.04% |
788
-295
| -27% | -$40.1K |
|
347
PUT
Carnival Corporation Ltd
CCL
$35.7B
| $9.91M | 0.04% |
1,730
+780
| +82% | +$49.5K |
|
348
CALL
PNC Financial Services
PNC
$101B
| $9.85M | 0.04% |
729
-58
| -7% | -$8.46K |
|
349
PUT
Diamondback Energy
FANG
$57.1B
| $9.83M | 0.04% |
747
+724
| +3,148% | +$89.8K |
|
|
UWC
350
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $9.83M | 0.04% |
2,252
+811
| +56% | +$3.54M |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.