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 | |
|---|---|---|---|---|---|---|
|
ATVI
251
CALL
DELISTED
Activision Blizzard
ATVI
| $13.9M | 0.05% |
1,826
-544
| -23% | -$38.5K |
|
252
CALL
AB InBev
BUD
$161B
| $13.9M | 0.05% |
1,383
-156
| -10% | -$15.5K |
|
253
CALL
Align Technology
ALGN
$12.5B
| $13.9M | 0.05% |
405
-10,965
| -96% | -$3.27M |
|
254
CALL
Halliburton
HAL
$27.4B
| $13.8M | 0.05% |
3,065
+463
| +18% | +$23.1K |
|
255
PUT
Mondelez International
MDLZ
$78B
| $13.8M | 0.05% |
3,364
+2,222
| +195% | +$89.3K |
|
256
CALL
Take-Two Interactive
TTWO
$43.5B
| $13.8M | 0.05% |
1,165
+665
| +133% | +$72.4K |
|
257
CALL
Weibo
WB
$1.94B
| $13.7M | 0.05% |
1,542
-12,185
| -89% | -$1.33M |
|
258
CALL
Vanguard S&P 500 ETF
VOO
$982B
| $13.7M | 0.05% |
1,315
+859
| +188% | +$213K |
|
|
PXD
259
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $13.7M | 0.05% |
722
+424
| +142% | +$81.2K |
|
|
PXD
260
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $13.6M | 0.05% |
721
+412
| +133% | +$78.9K |
|
261
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27.1B
| $13.6M | 0.05% |
384
-25
| -6% | -$8.79K |
|
262
CALL
Accenture
ACN
$85.8B
| $13.6M | 0.05% |
832
+106
| +15% | +$16.5K |
|
263
CALL
Comcast
CMCSA
$85B
| $13.6M | 0.05% |
4,140
+2,125
| +105% | +$69.2K |
|
264
PUT
Las Vegas Sands
LVS
$30.5B
| $13.5M | 0.05% |
1,763
+798
| +83% | +$60.9K |
|
265
CALL
Northrop Grumman
NOC
$75.3B
| $13.4M | 0.05% |
436
-60
| -12% | -$19.8K |
|
|
UCD
266
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $13.4M | 0.05% |
9,934
+1,207
| +14% | +$1.63M |
|
267
PUT
Merck
MRK
$316B
| $13.4M | 0.05% |
2,313
-1,146
| -33% | -$64.7K |
|
268
ExxonMobil
XOM
$640B
| $13.4M | 0.05% |
161,921
+98,154
| +154% | +$7.82M |
|
269
CALL
Regeneron Pharmaceuticals
REGN
$68.2B
| $13.4M | 0.05% |
387
-7,751
| -95% | -$2.42M |
|
270
CALL
iQIYI
IQ
$1.19B
| $13.3M | 0.05% |
+4,125
| New | +$100K |
|
271
PUT
EOG Resources
EOG
$77.3B
| $13.3M | 0.05% |
1,069
-340
| -24% | -$39.5K |
|
272
CALL
Kraft Heinz
KHC
$30.9B
| $13.2M | 0.05% |
2,101
+29
| +1% | +$1.72K |
|
273
CALL
Pfizer
PFE
$142B
| $13.2M | 0.05% |
3,833
+889
| +30% | +$30.4K |
|
274
CALL
Elevance Health
ELV
$84.1B
| $13.1M | 0.05% |
550
+356
| +184% | +$82.4K |
|
275
PUT
Ulta Beauty
ULTA
$20.8B
| $13M | 0.05% |
558
-300
| -35% | -$72.5K |
|
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.