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 | |
|---|---|---|---|---|---|---|
126
PUT
iShares MSCI Australia ETF
EWA
$1.35B
| $127M | 0.07% |
3,871,200
+1,040,600
| +37% | +$26.3M |
|
|
127
CALL
iShares MSCI Australia ETF
EWA
$1.35B
| $125M | 0.07% |
4,043,400
+1,287,800
| +47% | +$32.6M |
|
128
CALL
Chipotle Mexican Grill
CMG
$42.2B
| $124M | 0.07% |
2,156,700
-1,273,700
| -37% | -$70.5M |
|
129
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.53B
| $123M | 0.07% |
2,712,800
-62,600
| -2% | -$5.3M |
|
130
CALL
Dell
DELL
$288B
| $122M | 0.07% |
1,027,100
-708,000
| -41% | -$82.5M |
|
131
PUT
iShares Silver Trust
SLV
$29.1B
| $119M | 0.07% |
4,202,600
-2,558,500
| -38% | -$68.7M |
|
|
132
PUT
Dell
DELL
$288B
| $119M | 0.07% |
1,004,200
+91,900
| +10% | +$10.7M |
|
133
CALL
Wells Fargo
WFC
$263B
| $119M | 0.07% |
2,106,500
+4,200
| +0.2% | +$238K |
|
134
CALL
Johnson & Johnson
JNJ
$612B
| $119M | 0.07% |
733,700
+205,200
| +39% | +$32.7M |
|
135
CALL
Bristol-Myers Squibb
BMY
$125B
| $117M | 0.07% |
2,267,100
+690,200
| +44% | +$32.4M |
|
136
PUT
Royal Caribbean
RCL
$77.2B
| $116M | 0.07% |
652,000
+263,100
| +68% | +$42.6M |
|
137
CALL
Lockheed Martin
LMT
$119B
| $114M | 0.07% |
194,300
+13,300
| +7% | +$7.14M |
|
138
PUT
Target
TGT
$62.8B
| $113M | 0.07% |
728,100
+44,800
| +7% | +$6.67M |
|
139
CALL
Texas Instruments
TXN
$263B
| $113M | 0.07% |
544,700
-47,100
| -8% | -$9.47M |
|
140
PUT
Procter & Gamble
PG
$349B
| $112M | 0.07% |
646,800
+190,200
| +42% | +$32.3M |
|
141
CALL
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$258M
| $111M | 0.07% |
3,527,300
+983,500
| +39% | +$31M |
|
142
PUT
Caterpillar
CAT
$412B
| $110M | 0.06% |
281,500
+8,900
| +3% | +$3.07M |
|
143
PUT
Carvana
CVNA
$45.4B
| $110M | 0.06% |
3,155,000
-561,500
| -15% | -$16.1M |
|
144
CALL
Vistra
VST
$56.4B
| $109M | 0.06% |
917,700
-170,100
| -16% | -$14.4M |
|
145
CALL
Airbnb
ABNB
$83.7B
| $108M | 0.06% |
854,800
-17,100
| -2% | -$2.22M |
|
146
PUT
Shopify
SHOP
$156B
| $108M | 0.06% |
1,347,600
+345,400
| +34% | +$23.9M |
|
147
CALL
RTX Corp
RTX
$263B
| $107M | 0.06% |
886,500
-230,000
| -21% | -$26.2M |
|
148
CALL
Verizon
VZ
$186B
| $107M | 0.06% |
2,381,100
+461,500
| +24% | +$19.3M |
|
149
CALL
AbbVie
ABBV
$453B
| $106M | 0.06% |
537,700
-50,900
| -9% | -$9.5M |
|
150
PUT
Morgan Stanley
MS
$343B
| $106M | 0.06% |
1,016,900
-28,400
| -3% | -$2.86M |
|
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.