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
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
151
PUT
Procter & Gamble
PG
$350B
| $91.7M | 0.07% |
628,900
-72,300
| -10% | -$11M |
|
|
KFYP
152
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $91.5M | 0.07% |
3,340,600
+726,300
| +28% | +$16.7M |
|
153
PUT
Shopify
SHOP
$153B
| $91.1M | 0.07% |
1,668,700
-249,200
| -13% | -$15.1M |
|
154
CALL
Starbucks
SBUX
$119B
| $90M | 0.07% |
986,300
-139,300
| -12% | -$13.7M |
|
|
NVO
155
PUT
Novo Nordisk
NVO
$215B
| $89.9M | 0.07% |
989,100
+492,300
| +99% | +$43.4M |
|
156
PUT
McDonald's
MCD
$188B
| $89.9M | 0.07% |
341,100
+68,400
| +25% | +$19.5M |
|
157
CALL
Proshares UltraShort Technology
REW
$3.27M
| $89.8M | 0.07% |
549,288
+215,388
| +65% | +$18M |
|
158
CALL
General Motors
GM
$74.3B
| $88.7M | 0.07% |
2,689,000
+769,500
| +40% | +$27.3M |
|
159
CALL
CrowdStrike
CRWD
$191B
| $88.2M | 0.07% |
2,108,800
-185,200
| -8% | -$7.2M |
|
160
PUT
Enphase Energy
ENPH
$5.33B
| $87.8M | 0.07% |
730,800
+207,200
| +40% | +$29.5M |
|
161
PUT
Verizon
VZ
$185B
| $86.3M | 0.07% |
2,663,500
+673,800
| +34% | +$22.8M |
|
162
CALL
Freeport-McMoran
FCX
$93B
| $86.3M | 0.07% |
2,314,400
+790,700
| +52% | +$31.9M |
|
163
CALL
Home Depot
HD
$332B
| $85.5M | 0.07% |
283,000
-291,900
| -51% | -$93.9M |
|
164
CALL
Coca-Cola
KO
$355B
| $85.2M | 0.07% |
1,521,300
-172,300
| -10% | -$10.3M |
|
165
CALL
Occidental Petroleum
OXY
$56.8B
| $84.2M | 0.07% |
1,297,600
+75,200
| +6% | +$4.73M |
|
|
166
PUT
Qualcomm
QCOM
$187B
| $83.9M | 0.07% |
755,300
-147,500
| -16% | -$17.1M |
|
167
CALL
IBM
IBM
$197B
| $83.8M | 0.07% |
601,000
-299,800
| -33% | -$42.7M |
|
168
PUT
Blackstone
BX
$150B
| $82.8M | 0.07% |
772,700
+124,700
| +19% | +$13M |
|
169
PUT
ARK Space & Defense Innovation ETF
ARKX
$830M
| $82.8M | 0.07% |
2,133,000
+22,000
| +1% | +$322K |
|
170
CALL
Vanguard S&P 500 ETF
VOO
$982B
| $82.4M | 0.06% |
321,000
-80,400
| -20% | -$32.9M |
|
|
171
PUT
IBM
IBM
$197B
| $81.7M | 0.06% |
584,000
+800
| +0.1% | +$114K |
|
172
PUT
ConocoPhillips
COP
$144B
| $81.4M | 0.06% |
679,300
+310,600
| +84% | +$36.1M |
|
|
173
PUT
CrowdStrike
CRWD
$191B
| $81.2M | 0.06% |
1,940,800
-253,200
| -12% | -$9.84M |
|
174
PUT
CVS Health
CVS
$139B
| $81.1M | 0.06% |
1,161,500
+177,500
| +18% | +$12.6M |
|
175
CALL
Wells Fargo
WFC
$263B
| $81M | 0.06% |
1,982,600
-2,600
| -0.1% | -$112K |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.