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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
201
CALL
Palantir
PLTR
$297B
| $66.9M | 0.06% |
+2,539,800
| New | +$58.7M |
|
202
CALL
AbbVie
ABBV
$446B
| $66.3M | 0.06% |
589,000
+584,193
| +12,153% | +$65.8M |
|
203
CALL
RTX Corp
RTX
$261B
| $65.8M | 0.06% |
778,998
+774,706
| +18,050% | +$65.2M |
|
204
PUT
Biogen
BIIB
$29.4B
| $65.6M | 0.06% |
+189,500
| New | +$57.4M |
|
205
CALL
Teladoc Health
TDOC
$1.6B
| $65.4M | 0.06% |
393,100
+391,146
| +20,018% | +$63.4M |
|
206
PUT
Home Depot
HD
$331B
| $64.8M | 0.06% |
+203,300
| New | +$64.7M |
|
207
PUT
Oracle
ORCL
$363B
| $64.1M | 0.06% |
823,400
+819,544
| +21,254% | +$64.2M |
|
208
PUT
Chewy
CHWY
$8.8B
| $64.1M | 0.06% |
803,800
+800,554
| +24,663% | +$61.9M |
|
209
PUT
UnitedHealth
UNH
$391B
| $63.8M | 0.06% |
+159,200
| New | +$63.5M |
|
210
PUT
VanEck Durable High Dividend ETF
DURA
$38.4M
| $62.2M | 0.06% |
305,900
+304,057
| +16,498% | +$9.4M |
|
211
PUT
Expedia Group
EXPE
$31.3B
| $60.2M | 0.06% |
367,800
+364,930
| +12,715% | +$62.6M |
|
212
CALL
American Airlines Group
AAL
$9.69B
| $60.1M | 0.06% |
2,833,400
+2,809,607
| +11,809% | +$63.6M |
|
213
CALL
Texas Instruments
TXN
$268B
| $59.7M | 0.06% |
310,200
+308,153
| +15,054% | +$57.8M |
|
214
PUT
Strategy Inc
MSTR
$36.1B
| $59.6M | 0.06% |
897,000
+892,830
| +21,411% | +$52.8M |
|
|
215
CALL
Oracle
ORCL
$363B
| $59M | 0.06% |
758,100
+752,470
| +13,365% | +$58.9M |
|
|
ATVI
216
PUT
DELISTED
Activision Blizzard
ATVI
| $58.9M | 0.06% |
617,200
+614,169
| +20,263% | +$58.2M |
|
217
CALL
Intuitive Surgical
ISRG
$121B
| $58.8M | 0.06% |
191,700
+190,131
| +12,118% | +$53.3M |
|
218
CALL
Bilibili
BILI
$7.39B
| $57.9M | 0.06% |
475,500
+472,183
| +14,235% | +$51.2M |
|
219
PUT
Ford
F
$57.3B
| $57.6M | 0.06% |
3,875,600
+3,848,793
| +14,357% | +$51.2M |
|
220
PUT
Freeport-McMoran
FCX
$92.8B
| $57.3M | 0.06% |
+1,545,000
| New | +$60.2M |
|
221
CALL
Starbucks
SBUX
$118B
| $57.3M | 0.06% |
512,100
+505,232
| +7,356% | +$57.1M |
|
222
CALL
Western Digital
WDC
$192B
| $57M | 0.06% |
1,060,517
+1,054,216
| +16,731% | +$57M |
|
223
PUT
Mercado Libre
MELI
$91.3B
| $57M | 0.06% |
+36,600
| New | +$53.7M |
|
224
PUT
Roblox
RBLX
$35.7B
| $56.2M | 0.05% |
624,600
+623,319
| +48,659% | +$50.1M |
|
225
CALL
CVS Health
CVS
$138B
| $55.1M | 0.05% |
660,400
+655,929
| +14,671% | +$53.7M |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.