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 | |
|---|---|---|---|---|---|---|
1001
CALL
GameStop
GME
$9.58B
| $2.44M | 0.01% |
6,708
+536
| +9% | +$1.84K |
|
|
MOMO
1002
Hello Group
MOMO
$870M
| $2.44M | 0.01% |
+56,134
| New | +$2.33M |
|
1003
Walt Disney
DIS
$161B
| $2.43M | 0.01% |
23,182
+12,339
| +114% | +$1.26M |
|
1004
PUT
XPO
XPO
$25.1B
| $2.42M | 0.01% |
700
-144
| -17% | -$5.22K |
|
1005
CALL
Check Point Software Technologies
CHKP
$13.1B
| $2.42M | 0.01% |
248
+196
| +377% | +$19.4K |
|
1006
PUT
Lennox International
LII
$18.7B
| $2.42M | 0.01% |
121
+106
| +707% | +$21.5K |
|
1007
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$707M
| $2.42M | 0.01% |
631
-126
| -17% | -$4.39K |
|
|
K
1008
PUT
DELISTED
Kellanova
K
| $2.42M | 0.01% |
368
-617
| -63% | -$36.7K |
|
1009
General Mills
GIS
$19B
| $2.41M | 0.01% |
54,529
+24,598
| +82% | +$1.08M |
|
1010
CALL
Duke Energy
DUK
$101B
| $2.41M | 0.01% |
305
-611
| -67% | -$47K |
|
|
DFS
1011
PUT
DELISTED
Discover Financial Services
DFS
| $2.41M | 0.01% |
342
-238
| -41% | -$17.5K |
|
|
SGI
1012
PUT
Somnigroup International
SGI
$14.5B
| $2.41M | 0.01% |
2,004
-928
| -32% | -$10.9K |
|
1013
PUT
Roper Technologies
ROP
$35.8B
| $2.4M | 0.01% |
87
-118
| -58% | -$32.6K |
|
1014
PUT
Williams-Sonoma
WSM
$25.7B
| $2.4M | 0.01% |
782
+514
| +192% | +$13.8K |
|
1015
CALL
Bank of Montreal
BMO
$124B
| $2.4M | 0.01% |
310
+219
| +241% | +$16.9K |
|
1016
CALL
Viatris
VTRS
$20.1B
| $2.39M | 0.01% |
661
-271
| -29% | -$10.6K |
|
|
EBIX
1017
PUT
DELISTED
Ebix Inc
EBIX
| $2.38M | 0.01% |
312
+173
| +124% | +$13.3K |
|
1018
CALL
Equifax
EFX
$19.6B
| $2.38M | 0.01% |
190
-898
| -83% | -$106K |
|
|
WRK
1019
CALL
DELISTED
WestRock Company
WRK
| $2.38M | 0.01% |
417
+151
| +57% | +$9.26K |
|
1020
CALL
Lumen
LUMN
$6.73B
| $2.37M | 0.01% |
1,273
-202
| -14% | -$3.67K |
|
|
I
1021
CALL
DELISTED
INTELSAT S. A.
I
| $2.37M | 0.01% |
1,423
+1,404
| +7,389% | +$18.2K |
|
1022
Stellantis
STLA
$16.7B
| $2.37M | 0.01% |
+125,372
| New | +$2.75M |
|
1023
PUT
YPF
YPF
$20.4B
| $2.36M | 0.01% |
1,739
-490
| -22% | -$9.57K |
|
1024
CALL
Qualys
QLYS
$4.71B
| $2.36M | 0.01% |
280
+67
| +31% | +$5.38K |
|
1025
CALL
Hasbro
HAS
$12.4B
| $2.35M | 0.01% |
255
-231
| -48% | -$20.3K |
|
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.