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 | |
|---|---|---|---|---|---|---|
751
PUT
CarMax
KMX
$8.11B
| $3.53M | 0.01% |
485
+322
| +198% | +$21.5K |
|
752
CALL
MPLX
MPLX
$57.8B
| $3.52M | 0.01% |
1,032
+686
| +198% | +$23.9K |
|
753
PUT
Zebra Technologies
ZBRA
$12.4B
| $3.51M | 0.01% |
245
+66
| +37% | +$9.72K |
|
754
CALL
Veeva Systems
VEEV
$29.8B
| $3.5M | 0.01% |
456
-153
| -25% | -$11.6K |
|
755
CALL
PVH
PVH
$3.62B
| $3.5M | 0.01% |
234
+120
| +105% | +$18.9K |
|
|
BNY
756
CALL
Bank of New York Mellon
BNY
$108B
| $3.5M | 0.01% |
649
-334
| -34% | -$18.4K |
|
757
CALL
DaVita
DVA
$14.9B
| $3.5M | 0.01% |
504
+401
| +389% | +$26.8K |
|
|
I
758
PUT
DELISTED
INTELSAT S. A.
I
| $3.5M | 0.01% |
+2,100
| New | +$27.2K |
|
759
PUT
Alcoa
AA
$12.1B
| $3.49M | 0.01% |
745
-233
| -24% | -$11.7K |
|
760
CALL
IPG Photonics
IPGP
$4.15B
| $3.48M | 0.01% |
158
-50
| -24% | -$11.8K |
|
|
IMMU
761
PUT
DELISTED
Immunomedics Inc
IMMU
| $3.48M | 0.01% |
1,470
-593
| -29% | -$11.9K |
|
762
Gilead Sciences
GILD
$160B
| $3.47M | 0.01% |
+49,006
| New | +$3.46M |
|
763
PUT
Nektar Therapeutics
NKTR
$2.33B
| $3.47M | 0.01% |
47
+40
| +571% | +$46.1K |
|
764
CALL
BHP
BHP
$213B
| $3.46M | 0.01% |
775
+152
| +24% | +$6.58K |
|
765
PUT
Eli Lilly
LLY
$1.04T
| $3.46M | 0.01% |
405
-244
| -38% | -$20K |
|
766
CALL
Ambarella
AMBA
$3B
| $3.44M | 0.01% |
892
+326
| +58% | +$15.4K |
|
767
VF Corp
VFC
$6.54B
| $3.44M | 0.01% |
+44,771
| New | +$3.37M |
|
768
CALL
Yelp
YELP
$1.36B
| $3.44M | 0.01% |
877
+153
| +21% | +$6.62K |
|
|
PF
769
PUT
DELISTED
Pinnacle Foods, Inc.
PF
| $3.44M | 0.01% |
528
-469
| -47% | -$28.9K |
|
770
CALL
Skyworks Solutions
SWKS
$9.32B
| $3.43M | 0.01% |
355
+14
| +4% | +$1.36K |
|
771
CALL
Texas Capital Bancshares
TCBI
$4.34B
| $3.43M | 0.01% |
375
+284
| +312% | +$27.5K |
|
|
CERN
772
CALL
DELISTED
Cerner Corp
CERN
| $3.43M | 0.01% |
574
+348
| +154% | +$20.6K |
|
|
FNSR
773
PUT
DELISTED
Finisar Corp
FNSR
| $3.42M | 0.01% |
1,900
+1,722
| +967% | +$28.5K |
|
774
CALL
DXC Technology
DXC
$1.48B
| $3.42M | 0.01% |
505
+459
| +998% | +$39.5K |
|
775
PUT
Workday
WDAY
$32.3B
| $3.42M | 0.01% |
282
-6
| -2% | -$768 |
|
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.