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 | |
|---|---|---|---|---|---|---|
876
PUT
Copa Holdings
CPA
$5.52B
| $2.92M | 0.01% |
309
+31
| +11% | +$3.48K |
|
877
PUT
Extra Space Storage
EXR
$30.7B
| $2.91M | 0.01% |
292
+278
| +1,986% | +$25.9K |
|
878
PUT
G-III Apparel Group
GIII
$1.46B
| $2.91M | 0.01% |
656
+622
| +1,829% | +$25.3K |
|
879
CALL
Box
BOX
$3.93B
| $2.91M | 0.01% |
1,165
+870
| +295% | +$21.6K |
|
880
CALL
Murphy USA
MUSA
$11.5B
| $2.9M | 0.01% |
391
+163
| +71% | +$11.3K |
|
|
ABMD
881
CALL
DELISTED
Abiomed Inc
ABMD
| $2.9M | 0.01% |
71
-2,788
| -98% | -$1.01M |
|
882
PUT
O'Reilly Automotive
ORLY
$71.2B
| $2.9M | 0.01% |
1,590
-30
| -2% | -$522 |
|
883
PUT
SolarEdge
SEDG
$2.74B
| $2.9M | 0.01% |
606
+142
| +31% | +$7.86K |
|
884
CALL
EQT Corp
EQT
$33.3B
| $2.88M | 0.01% |
959
-252
| -21% | -$7.03K |
|
885
PUT
Waste Management
WM
$95B
| $2.88M | 0.01% |
354
-98
| -22% | -$8.12K |
|
886
CALL
Coty
COTY
$2.27B
| $2.88M | 0.01% |
2,041
+1,018
| +100% | +$15.7K |
|
|
AGN
887
DELISTED
Allergan plc
AGN
| $2.87M | 0.01% |
+17,195
| New | +$2.76M |
|
888
Johnson & Johnson
JNJ
$622B
| $2.86M | 0.01% |
23,581
-27,361
| -54% | -$3.41M |
|
889
PUT
Trade Desk
TTD
$7.9B
| $2.86M | 0.01% |
3,050
+550
| +22% | +$3.88K |
|
|
AKRX
890
CALL
DELISTED
Akorn Inc
AKRX
| $2.84M | 0.01% |
1,714
+624
| +57% | +$9.57K |
|
|
XL
891
CALL
DELISTED
XL Group Ltd.
XL
| $2.84M | 0.01% |
508
+74
| +17% | +$4.12K |
|
892
CALL
Jack Henry & Associates
JKHY
$10.5B
| $2.84M | 0.01% |
218
+212
| +3,533% | +$26.3K |
|
893
Twilio
TWLO
$28B
| $2.84M | 0.01% |
50,692
+6,852
| +16% | +$339K |
|
894
CALL
Post Holdings
POST
$4.06B
| $2.84M | 0.01% |
504
+446
| +769% | +$23.3K |
|
895
AutoZone
AZO
$47.7B
| $2.83M | 0.01% |
+4,226
| New | +$2.73M |
|
896
TAL Education Group
TAL
$5.72B
| $2.83M | 0.01% |
+76,937
| New | +$3.03M |
|
897
PUT
United Therapeutics
UTHR
$26.3B
| $2.81M | 0.01% |
248
+231
| +1,359% | +$25.4K |
|
|
WP
898
DELISTED
Worldpay, Inc.
WP
| $2.81M | 0.01% |
+34,323
| New | +$2.81M |
|
|
GWPH
899
PUT
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $2.8M | 0.01% |
201
+172
| +593% | +$24.4K |
|
900
CALL
Newell Brands
NWL
$2.13B
| $2.8M | 0.01% |
1,087
-11,413
| -91% | -$297K |
|
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.