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
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
CALL
Comcast
CMCSA
$85B
| $108M | 0.12% |
3,101,000
+1,384,000
| +81% | +$45.8M |
|
|
XYZ
127
CALL
Block Inc
XYZ
$46.5B
| $108M | 0.12% |
1,721,300
-499,400
| -22% | -$30.8M |
|
|
128
CALL
AT&T
T
$159B
| $107M | 0.12% |
7,029,300
+1,120,200
| +19% | +$20.1M |
|
129
PUT
Lam Research
LRCX
$399B
| $106M | 0.12% |
2,526,000
+1,252,000
| +98% | +$52.4M |
|
130
CALL
Pinduoduo
PDD
$119B
| $105M | 0.11% |
1,292,700
+442,700
| +52% | +$30.8M |
|
131
PUT
Shopify
SHOP
$156B
| $105M | 0.11% |
3,014,600
+255,700
| +9% | +$8.73M |
|
132
PUT
Charter Communications
CHTR
$15.5B
| $103M | 0.11% |
304,100
+191,400
| +170% | +$67.3M |
|
133
CALL
Booking.com
BKNG
$138B
| $103M | 0.11% |
1,277,500
+765,000
| +149% | +$58.1M |
|
134
PUT
Merck
MRK
$317B
| $103M | 0.11% |
1,077,400
+203,500
| +23% | +$20.8M |
|
135
CALL
TSMC
TSM
$2.18T
| $101M | 0.11% |
1,359,900
+179,300
| +15% | +$13M |
|
136
PUT
Lockheed Martin
LMT
$119B
| $101M | 0.11% |
207,100
-43,000
| -17% | -$20M |
|
137
CALL
Target
TGT
$62.8B
| $100M | 0.11% |
672,200
+43,800
| +7% | +$6.87M |
|
138
PUT
iShares MSCI Australia ETF
EWA
$1.35B
| $98.8M | 0.11% |
3,428,800
-1,728,800
| -34% | -$37.6M |
|
139
CALL
Union Pacific
UNP
$174B
| $98.4M | 0.11% |
475,300
+161,700
| +52% | +$33.2M |
|
140
PUT
iShares Silver Trust
SLV
$29.1B
| $98.4M | 0.11% |
4,467,200
+1,440,500
| +48% | +$28.2M |
|
141
PUT
Ford
F
$57.9B
| $98.4M | 0.11% |
8,456,800
-163,700
| -2% | -$2.1M |
|
142
CALL
Intuitive Surgical
ISRG
$123B
| $98.2M | 0.11% |
370,100
+75,500
| +26% | +$18.4M |
|
143
PUT
Morgan Stanley
MS
$343B
| $97.7M | 0.11% |
1,149,100
-166,400
| -13% | -$14.2M |
|
|
144
CALL
Shopify
SHOP
$156B
| $97.5M | 0.11% |
2,808,600
+386,800
| +16% | +$13.2M |
|
145
CALL
Pinterest
PINS
$12.6B
| $97.3M | 0.11% |
4,007,400
+365,100
| +10% | +$8.71M |
|
146
CALL
Moderna
MRNA
$23.4B
| $97M | 0.11% |
634,600
+269,600
| +74% | +$44.1M |
|
147
CALL
Micron Technology
MU
$1.1T
| $96.6M | 0.11% |
1,933,500
+164,700
| +9% | +$9.01M |
|
|
148
PUT
TSMC
TSM
$2.18T
| $96.3M | 0.1% |
1,292,600
-549,700
| -30% | -$39.8M |
|
149
CALL
Airbnb
ABNB
$83.7B
| $95.9M | 0.1% |
1,121,500
+272,600
| +32% | +$27.5M |
|
150
PUT
Palo Alto Networks
PANW
$274B
| $94.9M | 0.1% |
1,360,800
+586,800
| +76% | +$47.1M |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.