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 | |
|---|---|---|---|---|---|---|
1151
CALL
Factset
FDS
$8.68B
| $2M | 0.01% |
101
+14
| +16% | +$2.8K |
|
1152
CALL
Ironwood Pharmaceuticals
IRWD
$624M
| $2M | 0.01% |
1,249
+890
| +248% | +$13.2K |
|
|
AZPN
1153
CALL
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $1.98M | 0.01% |
+214
| New | +$1.98M |
|
1154
PUT
Freeport-McMoran
FCX
$91.3B
| $1.98M | 0.01% |
1,149
-460
| -29% | -$7.8K |
|
|
CGC
1155
PUT
Canopy Growth
CGC
$382M
| $1.98M | 0.01% |
+68
| New | +$20.6K |
|
1156
Costco
COST
$411B
| $1.98M | 0.01% |
+9,461
| New | +$1.87M |
|
1157
PUT
Nutrien
NTR
$32.9B
| $1.97M | 0.01% |
363
-196
| -35% | -$9.72K |
|
|
NBIS
1158
CALL
Nebius Group N.V.
NBIS
$56.1B
| $1.97M | 0.01% |
549
+354
| +182% | +$12.3K |
|
1159
Copa Holdings
CPA
$5.54B
| $1.97M | 0.01% |
20,780
+15,679
| +307% | +$1.76M |
|
1160
CALL
Celanese
CE
$5.19B
| $1.97M | 0.01% |
+177
| New | +$19.5K |
|
1161
CALL
Gen Digital
GEN
$15.1B
| $1.96M | 0.01% |
951
+505
| +113% | +$12.1K |
|
1162
PUT
Intercontinental Exchange
ICE
$81B
| $1.96M | 0.01% |
267
+108
| +68% | +$7.86K |
|
1163
PUT
Silicon Laboratories
SLAB
$7.15B
| $1.96M | 0.01% |
+197
| New | +$19.7K |
|
1164
CALL
Abercrombie & Fitch
ANF
$4.04B
| $1.96M | 0.01% |
801
-383
| -32% | -$10K |
|
1165
PUT
Capri Holdings
CPRI
$1.78B
| $1.95M | 0.01% |
293
+66
| +29% | +$4.31K |
|
1166
CALL
Incyte
INCY
$23.3B
| $1.95M | 0.01% |
291
-19,222
| -99% | -$1.31M |
|
1167
DaVita
DVA
$15B
| $1.95M | 0.01% |
28,060
+8,802
| +46% | +$588K |
|
1168
CALL
Parker-Hannifin
PH
$124B
| $1.95M | 0.01% |
125
+62
| +98% | +$10.6K |
|
|
WCG
1169
CALL
DELISTED
Wellcare Health Plans, Inc.
WCG
| $1.95M | 0.01% |
79
-1,544
| -95% | -$336K |
|
1170
CALL
D.R. Horton
DHI
$39.9B
| $1.94M | 0.01% |
473
-924
| -66% | -$39.9K |
|
1171
iShares Expanded Tech-Software Sector ETF
IGV
$12.9B
| $1.94M | 0.01% |
53,020
+4,055
| +8% | +$146K |
|
1172
PUT
Arch Capital
ACGL
$35B
| $1.94M | 0.01% |
732
-30
| -4% | -$806 |
|
1173
CALL
Keysight
KEYS
$55.6B
| $1.94M | 0.01% |
328
+315
| +2,423% | +$17.5K |
|
1174
PUT
Aon
AON
$76B
| $1.93M | 0.01% |
141
+14
| +11% | +$1.97K |
|
1175
CALL
Enterprise Products Partners
EPD
$83.9B
| $1.93M | 0.01% |
699
-108
| -13% | -$2.95K |
|
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.