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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
DPLO
2276
DELISTED
DIPLOMAT PHARMACY, INC.
DPLO
| $693K | ﹤0.01% |
+35,711
| New | +$760K |
|
2277
PUT
CBRE Group
CBRE
$40.8B
| $692K | ﹤0.01% |
157
+52
| +50% | +$2.48K |
|
2278
LivaNova
LIVN
$4.3B
| $690K | ﹤0.01% |
+5,570
| New | +$657K |
|
2279
PUT
Masco
MAS
$16B
| $688K | ﹤0.01% |
188
-4
| -2% | -$154 |
|
2280
PUT
Methanex
MEOH
$4.32B
| $688K | ﹤0.01% |
87
+52
| +149% | +$3.78K |
|
2281
PUT
Spectrum Brands
SPB
$2.04B
| $687K | ﹤0.01% |
92
+43
| +88% | +$3.64K |
|
|
BITA
2282
PUT
DELISTED
Bitauto Holdings Limited
BITA
| $687K | ﹤0.01% |
299
-17
| -5% | -$388 |
|
|
ESV
2283
PUT
DELISTED
Ensco Rowan plc
ESV
| $686K | ﹤0.01% |
203
+59
| +41% | +$1.69K |
|
2284
PUT
Macerich
MAC
$7.32B
| $685K | ﹤0.01% |
124
+86
| +226% | +$4.96K |
|
2285
CALL
Southern Copper
SCCO
$141B
| $685K | ﹤0.01% |
172
-80
| -32% | -$3.29K |
|
|
WRD
2286
PUT
DELISTED
WildHorse Resource Development
WRD
| $685K | ﹤0.01% |
290
+160
| +123% | +$3.44K |
|
2287
PUT
Idacorp
IDA
$8.23B
| $684K | ﹤0.01% |
+69
| New | +$6.65K |
|
2288
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $684K | ﹤0.01% |
87
+53
| +156% | +$4.17K |
|
2289
PUT
Lincoln National
LNC
$7.91B
| $683K | ﹤0.01% |
101
-17
| -14% | -$1.12K |
|
|
AZPN
2290
CALL
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $683K | ﹤0.01% |
60
-154
| -72% | -$1.75M |
|
|
P
2291
CALL
Everpure Inc
P
$24.8B
| $682K | ﹤0.01% |
263
-324
| -55% | -$8.05K |
|
2292
PUT
CONMED
CNMD
$1.29B
| $681K | ﹤0.01% |
+86
| New | +$6.65K |
|
2293
CALL
Huazhu Hotels Group
HTHT
$12.4B
| $681K | ﹤0.01% |
211
-109
| -34% | -$3.83K |
|
2294
CALL
BorgWarner
BWA
$13.2B
| $680K | ﹤0.01% |
181
-133
| -42% | -$5.23K |
|
2295
PUT
Henry Schein
HSIC
$9.74B
| $680K | ﹤0.01% |
102
-28
| -22% | -$1.74K |
|
2296
CALL
Planet Fitness
PLNT
$4.23B
| $680K | ﹤0.01% |
126
-39
| -24% | -$1.94K |
|
2297
Vanguard Total Stock Market ETF
VTI
$654B
| $679K | ﹤0.01% |
+4,543
| New | +$669K |
|
2298
CALL
Howmet Aerospace
HWM
$116B
| $677K | ﹤0.01% |
425
+22
| +5% | +$350 |
|
2299
Tucows
TCX
$97.1M
| $677K | ﹤0.01% |
12,150
+6,939
| +133% | +$398K |
|
2300
CALL
Murphy Oil
MUR
$5.58B
| $676K | ﹤0.01% |
203
-26
| -11% | -$826 |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.