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 | |
|---|---|---|---|---|---|---|
901
PUT
Newell Brands
NWL
$2.14B
| $2.8M | 0.01% |
1,087
-411
| -27% | -$10.7K |
|
902
CALL
Lamb Weston
LW
$6.79B
| $2.8M | 0.01% |
+409
| New | +$26.7K |
|
903
CALL
Agnico Eagle Mines
AEM
$72.3B
| $2.79M | 0.01% |
610
-445
| -42% | -$19.6K |
|
|
DISCK
904
CALL
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $2.79M | 0.01% |
1,023
+381
| +59% | +$8.49K |
|
905
PUT
Aflac
AFL
$63.3B
| $2.79M | 0.01% |
649
-95
| -13% | -$4.27K |
|
906
CALL
Tractor Supply
TSCO
$15.9B
| $2.78M | 0.01% |
1,820
-150
| -8% | -$2.08K |
|
907
CALL
Mondelez International
MDLZ
$77.1B
| $2.78M | 0.01% |
678
-420
| -38% | -$16.9K |
|
908
Skyworks Solutions
SWKS
$9.1B
| $2.78M | 0.01% |
28,757
+27,223
| +1,775% | +$2.65M |
|
909
PUT
Eastman Chemical
EMN
$7.77B
| $2.78M | 0.01% |
278
-16
| -5% | -$1.69K |
|
910
CALL
Blackbaud
BLKB
$1.44B
| $2.78M | 0.01% |
271
+4
| +1% | +$413 |
|
911
PUT
APA Corp
APA
$12.9B
| $2.77M | 0.01% |
593
-94
| -14% | -$3.9K |
|
|
SODA
912
CALL
DELISTED
SodaStream International Ltd
SODA
| $2.77M | 0.01% |
325
+13
| +4% | +$1.17K |
|
913
CALL
ASML
ASML
$693B
| $2.77M | 0.01% |
140
-5
| -3% | -$1K |
|
914
CALL
Royal Bank of Canada
RY
$290B
| $2.77M | 0.01% |
368
-136
| -27% | -$10.4K |
|
915
PUT
Atlassian
TEAM
$20.3B
| $2.77M | 0.01% |
443
+174
| +65% | +$10.7K |
|
916
CALL
Diageo
DEO
$45.7B
| $2.76M | 0.01% |
192
-110
| -36% | -$15.8K |
|
917
PUT
EPAM Systems
EPAM
$4.5B
| $2.76M | 0.01% |
+222
| New | +$26.7K |
|
|
STI
918
PUT
DELISTED
SunTrust Banks, Inc.
STI
| $2.76M | 0.01% |
418
+244
| +140% | +$16.6K |
|
919
CALL
Heron Therapeutics
HRTX
$86.9M
| $2.76M | 0.01% |
710
+535
| +306% | +$17K |
|
920
CALL
Motorola Solutions
MSI
$67.6B
| $2.76M | 0.01% |
237
+131
| +124% | +$14.4K |
|
921
Universal Display
OLED
$3.71B
| $2.74M | 0.01% |
31,878
+5,339
| +20% | +$509K |
|
|
CMA
922
PUT
DELISTED
Comerica
CMA
| $2.74M | 0.01% |
301
+221
| +276% | +$21.2K |
|
923
VanEck Gold Miners ETF
GDX
$22.9B
| $2.73M | 0.01% |
122,539
+90,534
| +283% | +$2.03M |
|
924
CALL
Children's Place
PLCE
$58.7M
| $2.73M | 0.01% |
226
+43
| +23% | +$5.57K |
|
925
PUT
BioMarin Pharmaceuticals
BMRN
$11.4B
| $2.72M | 0.01% |
289
+190
| +192% | +$16.6K |
|
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.