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 | |
|---|---|---|---|---|---|---|
1626
CALL
SM Energy
SM
$7.96B
| $1.2M | ﹤0.01% |
468
+259
| +124% | +$6.05K |
|
1627
LiveRamp
RAMP
$2.29B
| $1.2M | ﹤0.01% |
40,085
+28,448
| +244% | +$779K |
|
|
EVHC
1628
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $1.2M | ﹤0.01% |
27,235
-5,994
| -18% | -$246K |
|
1629
CALL
Lamar Advertising Co
LAMR
$16.2B
| $1.2M | ﹤0.01% |
175
-231
| -57% | -$15.5K |
|
1630
CALL
Arrowhead Research
ARWR
$12.1B
| $1.19M | ﹤0.01% |
877
+660
| +304% | +$6.17K |
|
1631
CALL
BorgWarner
BWA
$13.2B
| $1.19M | ﹤0.01% |
314
+116
| +59% | +$5.11K |
|
1632
PUT
ResMed
RMD
$28.3B
| $1.19M | ﹤0.01% |
115
+106
| +1,178% | +$10.7K |
|
1633
PUT
Nexstar Media Group
NXST
$5.6B
| $1.19M | ﹤0.01% |
162
-38
| -19% | -$2.57K |
|
|
TMX
1634
CALL
DELISTED
Terminix Global Holdings, Inc.
TMX
| $1.19M | ﹤0.01% |
299
-21
| -7% | -$781 |
|
1635
Rio Tinto
RIO
$148B
| $1.19M | ﹤0.01% |
21,417
-3,594
| -14% | -$201K |
|
1636
PUT
Baker Hughes
BKR
$56.8B
| $1.19M | ﹤0.01% |
359
+241
| +204% | +$8.18K |
|
1637
PUT
Carvana
CVNA
$43.3B
| $1.19M | ﹤0.01% |
1,425
-1,700
| -54% | -$10.2K |
|
1638
CALL
Deckers Outdoor
DECK
$13.3B
| $1.19M | ﹤0.01% |
630
+246
| +64% | +$4.26K |
|
1639
Insperity
NSP
$1.85B
| $1.18M | ﹤0.01% |
12,428
+8,051
| +184% | +$692K |
|
|
ELLI
1640
CALL
DELISTED
Ellie Mae Inc
ELLI
| $1.18M | ﹤0.01% |
+114
| New | +$11.6K |
|
|
GRA
1641
DELISTED
W.R. Grace & Co.
GRA
| $1.18M | ﹤0.01% |
16,125
+12,112
| +302% | +$850K |
|
|
FOLD
1642
PUT
DELISTED
Amicus Therapeutics
FOLD
| $1.18M | ﹤0.01% |
756
+288
| +62% | +$4.35K |
|
1643
Cheesecake Factory
CAKE
$4.21B
| $1.18M | ﹤0.01% |
21,379
+20,974
| +5,179% | +$1.11M |
|
1644
CALL
Rithm Capital
RITM
$5.09B
| $1.18M | ﹤0.01% |
672
+432
| +180% | +$7.58K |
|
1645
PUT
Agnico Eagle Mines
AEM
$72.6B
| $1.17M | ﹤0.01% |
256
-148
| -37% | -$6.51K |
|
1646
CALL
Canadian Natural Resources
CNQ
$96.9B
| $1.17M | ﹤0.01% |
664
+55
| +9% | +$931 |
|
1647
PUT
Okta
OKTA
$24.1B
| $1.17M | ﹤0.01% |
232
+207
| +828% | +$9.85K |
|
1648
CALL
Pinnacle West Capital
PNW
$12.9B
| $1.17M | ﹤0.01% |
+145
| New | +$11.3K |
|
|
EGRX
1649
PUT
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $1.17M | ﹤0.01% |
154
+16
| +12% | +$1.01K |
|
|
CLR
1650
PUT
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $1.17M | ﹤0.01% |
180
-40
| -18% | -$2.58K |
|
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.