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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
101
PUT
Pfizer
PFE
$142B
| $158M | 0.09% |
5,470,700
-335,400
| -6% | -$9.78M |
|
102
CALL
Palo Alto Networks
PANW
$273B
| $157M | 0.09% |
915,800
-401,800
| -30% | -$67.6M |
|
|
103
PUT
Starbucks
SBUX
$119B
| $156M | 0.09% |
1,596,400
-176,200
| -10% | -$15.1M |
|
104
PUT
UnitedHealth
UNH
$395B
| $155M | 0.09% |
265,200
-40,100
| -13% | -$22.7M |
|
105
PUT
PayPal
PYPL
$49.1B
| $153M | 0.09% |
1,962,600
-425,200
| -18% | -$28.4M |
|
106
PUT
Vistra
VST
$56B
| $153M | 0.09% |
1,288,200
+869,700
| +208% | +$73.8M |
|
107
PUT
Intel
INTC
$532B
| $153M | 0.09% |
6,501,000
+444,000
| +7% | +$11.1M |
|
|
UWC
108
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $152M | 0.09% |
2,080,800
+294,800
| +17% | +$21.5M |
|
109
CALL
Nike
NKE
$62.5B
| $151M | 0.09% |
1,707,900
-403,000
| -19% | -$31.6M |
|
110
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.63B
| $149M | 0.09% |
3,819,400
+1,895,100
| +98% | +$161M |
|
111
CALL
Bank of America
BAC
$433B
| $148M | 0.09% |
3,739,400
+236,000
| +7% | +$9.46M |
|
112
CALL
Arm
ARM
$306B
| $147M | 0.09% |
1,029,500
+65,800
| +7% | +$9.35M |
|
113
PUT
NextEra Energy
NEE
$185B
| $146M | 0.09% |
1,727,500
+785,400
| +83% | +$61.3M |
|
114
CALL
Carvana
CVNA
$45.6B
| $145M | 0.08% |
4,153,500
+570,500
| +16% | +$16.4M |
|
115
CALL
Freeport-McMoran
FCX
$93B
| $144M | 0.08% |
2,877,500
+451,300
| +19% | +$20.3M |
|
|
KFYP
116
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $142M | 0.08% |
4,177,600
+1,630,700
| +64% | +$55.5M |
|
117
PUT
Chipotle Mexican Grill
CMG
$42.2B
| $142M | 0.08% |
2,457,100
-761,900
| -24% | -$42.2M |
|
118
PUT
Spotify
SPOT
$98.4B
| $141M | 0.08% |
381,500
-90,700
| -19% | -$30.2M |
|
119
CALL
Goldman Sachs
GS
$323B
| $139M | 0.08% |
281,400
-73,800
| -21% | -$36.1M |
|
120
PUT
Walt Disney
DIS
$168B
| $139M | 0.08% |
1,443,200
-78,200
| -5% | -$7.19M |
|
121
PUT
First Solar
FSLR
$22.7B
| $139M | 0.08% |
555,300
-153,500
| -22% | -$34.6M |
|
122
CALL
Adobe
ADBE
$88B
| $138M | 0.08% |
267,400
-30,300
| -10% | -$16.6M |
|
|
123
CALL
Starbucks
SBUX
$119B
| $134M | 0.08% |
1,773,900
+30,700
| +2% | +$2.63M |
|
124
PUT
ASML
ASML
$694B
| $130M | 0.08% |
155,500
+20,100
| +15% | +$18M |
|
|
125
PUT
Bank of America
BAC
$433B
| $129M | 0.08% |
3,989,600
+844,800
| +27% | +$33.9M |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.