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 | |
|---|---|---|---|---|---|---|
|
XLNX
1476
DELISTED
Xilinx Inc
XLNX
| $1.38M | 0.01% |
21,143
+19,326
| +1,064% | +$1.32M |
|
1477
PUT
Abercrombie & Fitch
ANF
$4.17B
| $1.38M | 0.01% |
563
-307
| -35% | -$8.03K |
|
|
MANT
1478
CALL
DELISTED
Mantech International Corp
MANT
| $1.38M | 0.01% |
257
+155
| +152% | +$8.63K |
|
1479
CALL
Zions Bancorporation
ZION
$10.1B
| $1.38M | 0.01% |
261
-144
| -36% | -$7.95K |
|
1480
iQIYI
IQ
$1.18B
| $1.37M | 0.01% |
+42,539
| New | +$1.04M |
|
1481
PUT
MongoDB
MDB
$24B
| $1.37M | 0.01% |
277
+68
| +33% | +$3.05K |
|
1482
PUT
Sprouts Farmers Market
SFM
$7.04B
| $1.37M | 0.01% |
623
+517
| +488% | +$11.7K |
|
|
VIAB
1483
DELISTED
Viacom Inc. Class B
VIAB
| $1.37M | 0.01% |
45,557
+19,654
| +76% | +$578K |
|
1484
PUT
TechnipFMC
FTI
$30.6B
| $1.37M | 0.01% |
581
+19
| +3% | +$453 |
|
1485
PUT
Alkermes
ALKS
$8.82B
| $1.37M | 0.01% |
333
| – | – |
|
1486
CALL
Deutsche Bank
DB
$66.3B
| $1.37M | 0.01% |
1,290
-344
| -21% | -$4.39K |
|
1487
PUT
Dine Brands
DIN
$432M
| $1.37M | 0.01% |
183
-232
| -56% | -$16.8K |
|
|
PAY
1488
CALL
DELISTED
Verifone Systems Inc
PAY
| $1.37M | 0.01% |
599
+217
| +57% | +$4.8K |
|
1489
Wingstop
WING
$3.68B
| $1.36M | 0.01% |
26,168
+12,727
| +95% | +$648K |
|
|
ETFC
1490
CALL
DELISTED
E*Trade Financial Corporation
ETFC
| $1.36M | 0.01% |
223
-697
| -76% | -$43.1K |
|
1491
Akamai
AKAM
$16.8B
| $1.36M | 0.01% |
+18,588
| New | +$1.39M |
|
|
ABAX
1492
PUT
DELISTED
Abaxis Inc
ABAX
| $1.36M | 0.01% |
+164
| New | +$12.6K |
|
1493
Carvana
CVNA
$43.3B
| $1.36M | 0.01% |
163,480
+70,885
| +77% | +$427K |
|
1494
CALL
MKS Inc
MKSI
$22.2B
| $1.36M | 0.01% |
142
+70
| +97% | +$7.63K |
|
|
IMMU
1495
CALL
DELISTED
Immunomedics Inc
IMMU
| $1.36M | 0.01% |
574
+374
| +187% | +$7.52K |
|
|
TLRD
1496
PUT
DELISTED
Tailored Brands, Inc.
TLRD
| $1.36M | 0.01% |
532
+375
| +239% | +$11.4K |
|
1497
CALL
Fortinet
FTNT
$112B
| $1.35M | 0.01% |
1,085
-125
| -10% | -$1.48K |
|
|
DCH
1498
CALL
Dauch Corp
DCH
$1.3B
| $1.35M | 0.01% |
870
+609
| +233% | +$9.79K |
|
1499
CALL
Golar LNG
GLNG
$4.95B
| $1.35M | 0.01% |
459
+320
| +230% | +$9.72K |
|
1500
PUT
Supernus Pharmaceuticals
SUPN
$2.68B
| $1.35M | 0.01% |
226
+15
| +7% | +$777 |
|
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.