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 | |
|---|---|---|---|---|---|---|
|
ESPR
1076
PUT
DELISTED
Esperion Therapeutics
ESPR
| $2.17M | 0.01% |
555
+296
| +114% | +$15K |
|
1077
CALL
CACI
CACI
$10.6B
| $2.17M | 0.01% |
129
+124
| +2,480% | +$20K |
|
1078
PUT
Weyerhaeuser
WY
$17B
| $2.17M | 0.01% |
596
+274
| +85% | +$10K |
|
1079
Royal Caribbean
RCL
$76B
| $2.17M | 0.01% |
20,937
+20,896
| +50,966% | +$2.3M |
|
1080
PUT
Bright Horizons
BFAM
$3.91B
| $2.16M | 0.01% |
+211
| New | +$21.2K |
|
|
MMP
1081
PUT
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $2.16M | 0.01% |
313
-24
| -7% | -$1.61K |
|
|
NAV
1082
PUT
DELISTED
Navistar International
NAV
| $2.16M | 0.01% |
530
+151
| +40% | +$5.76K |
|
1083
SAP
SAP
$171B
| $2.15M | 0.01% |
18,578
-4,579
| -20% | -$517K |
|
|
BRSL
1084
PUT
Brightstar Lottery PLC
BRSL
$1.9B
| $2.15M | 0.01% |
924
+821
| +797% | +$21.9K |
|
1085
PUT
Grand Canyon Education
LOPE
$3.69B
| $2.14M | 0.01% |
+192
| New | +$21.1K |
|
|
WUBA
1086
PUT
DELISTED
58.com Inc
WUBA
| $2.14M | 0.01% |
309
-240
| -44% | -$19.6K |
|
1087
PUT
Jazz Pharmaceuticals
JAZZ
$16B
| $2.14M | 0.01% |
124
+104
| +520% | +$17K |
|
|
SAGE
1088
PUT
DELISTED
Sage Therapeutics
SAGE
| $2.13M | 0.01% |
136
+55
| +68% | +$8.63K |
|
1089
CALL
AvalonBay Communities
AVB
$27.1B
| $2.11M | 0.01% |
123
+7
| +6% | +$1.16K |
|
|
X
1090
DELISTED
US Steel
X
| $2.1M | 0.01% |
60,466
-20,319
| -25% | -$727K |
|
1091
CALL
Restaurant Brands International
QSR
$25.1B
| $2.1M | 0.01% |
348
+291
| +511% | +$16.7K |
|
|
SIEN
1092
CALL
DELISTED
Sientra, Inc.
SIEN
| $2.1M | 0.01% |
107
+105
| +5,250% | +$16.6K |
|
|
VIAB
1093
CALL
DELISTED
Viacom Inc. Class B
VIAB
| $2.09M | 0.01% |
694
-886
| -56% | -$26.1K |
|
1094
Mohawk Industries
MHK
$6.71B
| $2.08M | 0.01% |
9,735
+4,647
| +91% | +$1.02M |
|
1095
CALL
Signet Jewelers
SIG
$3.48B
| $2.08M | 0.01% |
374
+9
| +2% | +$398 |
|
1096
PUT
Nu Skin
NUS
$247M
| $2.08M | 0.01% |
+266
| New | +$20.6K |
|
1097
Agios Pharmaceuticals
AGIO
$2.16B
| $2.08M | 0.01% |
24,678
+8,444
| +52% | +$736K |
|
1098
CALL
Alnylam Pharmaceuticals
ALNY
$35.9B
| $2.08M | 0.01% |
211
+50
| +31% | +$4.96K |
|
1099
CALL
Methanex
MEOH
$4.49B
| $2.08M | 0.01% |
294
-227
| -44% | -$15.2K |
|
|
GRN
1100
PUT
DELISTED
iPath Global Carbon ETN
GRN
| $2.08M | 0.01% |
932
-737
| -44% | -$12.8K |
|
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.