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 |
GE Aerospace
GE
|
+$36M |
| 2 |
Advanced Micro Devices
AMD
|
+$19.4M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
+$10.2M |
| 4 |
Micron Technology
MU
|
+$6.31M |
| 5 |
Alibaba
BABA
|
+$6.19M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$25.9M |
| 2 |
SPDR Gold Trust
GLD
|
+$15.3M |
| 3 |
Amazon
AMZN
|
+$9.53M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$9.03M |
| 5 |
State Street Technology Select Sector SPDR ETF
XLK
|
+$7.73M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.25% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
176
PUT
American Airlines Group
AAL
$9.94B
| $83M | 0.08% |
3,859,100
+27,000
| +0.7% | +$547K |
|
177
AMC Entertainment Holdings
AMC
$2.04B
| $82.5M | 0.08% |
152,244
+1,664
| +1% | +$671K |
|
178
CALL
ServiceNow
NOW
$100B
| $82.2M | 0.08% |
753,500
+70,000
| +10% | +$8.48M |
|
179
PUT
United States Oil Fund
USO
$2.36B
| $80.2M | 0.07% |
1,583,600
+44,000
| +3% | +$2.15M |
|
|
DOCU
180
CALL
DocuSign
DOCU
$9.19B
| $79.5M | 0.07% |
285,800
+9,700
| +4% | +$2.79M |
|
181
CALL
Cisco
CSCO
$445B
| $79.3M | 0.07% |
1,483,600
-10,500
| -0.7% | -$589K |
|
182
CALL
VanEck Durable High Dividend ETF
DURA
$38.4M
| $79.3M | 0.07% |
389,200
+39,300
| +11% | +$1.24M |
|
183
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $79.2M | 0.07% |
1,066,400
+19,300
| +2% | +$1.26M |
|
184
PUT
Palantir
PLTR
$304B
| $79M | 0.07% |
3,196,500
-29,200
| -0.9% | -$712K |
|
185
PUT
Texas Instruments
TXN
$264B
| $78.7M | 0.07% |
412,600
-2,500
| -0.6% | -$476K |
|
186
PUT
McDonald's
MCD
$187B
| $78M | 0.07% |
336,000
+45,900
| +16% | +$11M |
|
187
PUT
Verizon
VZ
$187B
| $77.5M | 0.07% |
1,377,200
+3,200
| +0.2% | +$177K |
|
188
PUT
Chevron
CVX
$383B
| $76.2M | 0.07% |
717,600
+12,900
| +2% | +$1.29M |
|
189
CALL
Applied Materials
AMAT
$443B
| $75.5M | 0.07% |
547,300
+20,600
| +4% | +$2.8M |
|
190
CALL
Beyond Meat
BYND
$312M
| $74.9M | 0.07% |
489,800
-7,400
| -1% | -$905K |
|
191
CALL
DraftKings
DKNG
$11.4B
| $74.3M | 0.07% |
1,434,700
-131,200
| -8% | -$6.95M |
|
192
PUT
Carnival Corporation Ltd
CCL
$35.8B
| $74M | 0.07% |
2,807,300
-22,000
| -0.8% | -$512K |
|
193
PUT
Sea Limited
SE
$64.2B
| $73.4M | 0.07% |
269,700
-900
| -0.3% | -$276K |
|
194
CALL
Pinterest
PINS
$12.6B
| $73.4M | 0.07% |
919,600
-21,800
| -2% | -$1.34M |
|
195
CALL
Ford
F
$57.5B
| $72.7M | 0.07% |
4,878,700
+215,500
| +5% | +$2.93M |
|
196
PUT
United Airlines
UAL
$38.1B
| $72.3M | 0.07% |
1,362,700
+4,000
| +0.3% | +$188K |
|
|
197
CALL
American Airlines Group
AAL
$9.94B
| $71.5M | 0.07% |
3,322,900
+489,500
| +17% | +$9.92M |
|
198
PUT
Snowflake
SNOW
$91.9B
| $70.6M | 0.07% |
298,100
+12,100
| +4% | +$3.44M |
|
199
PUT
Home Depot
HD
$331B
| $69.8M | 0.07% |
217,000
+13,700
| +7% | +$4.5M |
|
|
200
PUT
ServiceNow
NOW
$100B
| $69.5M | 0.06% |
637,500
-1,000
| -0.2% | -$121K |
|
Similar funds
Simplex Trading's Q3 2021 Portfolio in Review
As of Q3 2021, Simplex Trading held 10,062 positions worth $107B, up 3.4% from $104B the previous quarter. Its ten largest holdings account for 41% of the portfolio.
Trading was light in Q3 2021: portfolio turnover was 3.5%. Simplex Trading opened 86 new positions and exited 271, leaving the 10,062-position portfolio largely intact.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, up from 0.47% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q3 2021 buy was Olo Inc: 143,230 shares worth $4.91M.
- Simplex Trading added most to GE Aerospace in Q3 2021, an estimated $36M increase.
- Simplex Trading's biggest Q3 2021 reduction was NVIDIA, cutting an estimated $25.9M.
- Simplex Trading fully exited Amazon in Q3 2021, selling an estimated $9.53M.
- Simplex Trading's ten largest holdings make up 41% of its $107B portfolio in Q3 2021.
- Simplex Trading opened 86 new positions and closed 271 in Q3 2021.
- Simplex Trading's portfolio value rose 3.4% quarter-over-quarter to $107B.
Based on Simplex Trading's 13F filing for Q3 2021, filed 28 Oct 2021.