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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
176
PUT
Snowflake
SNOW
$94.2B
| $92.7M | 0.05% |
648,100
-106,400
| -14% | -$15M |
|
177
CALL
Vertiv
VRT
$117B
| $92.6M | 0.05% |
814,700
-211,800
| -21% | -$25.1M |
|
178
PUT
AbbVie
ABBV
$452B
| $92.3M | 0.05% |
519,600
+10,700
| +2% | +$1.97M |
|
179
CALL
Honeywell
HON
$72.8B
| $91.8M | 0.05% |
430,978
+293,154
| +213% | +$61.1M |
|
180
CALL
Bristol-Myers Squibb
BMY
$124B
| $91.1M | 0.05% |
1,610,100
-657,000
| -29% | -$36.7M |
|
181
CALL
McDonald's
MCD
$188B
| $90.9M | 0.05% |
313,400
-4,700
| -1% | -$1.4M |
|
182
CALL
Freeport-McMoran
FCX
$89.9B
| $89.9M | 0.05% |
2,361,300
-516,200
| -18% | -$23.1M |
|
183
PUT
ServiceNow
NOW
$105B
| $88M | 0.05% |
415,000
+95,000
| +30% | +$19.2M |
|
184
PUT
Chevron
CVX
$381B
| $87.9M | 0.05% |
607,000
-102,400
| -14% | -$15.7M |
|
185
PUT
Applovin
APP
$144B
| $87.2M | 0.05% |
269,200
+18,200
| +7% | +$4.6M |
|
186
PUT
ConocoPhillips
COP
$143B
| $86.6M | 0.05% |
872,800
+505,400
| +138% | +$53.7M |
|
187
PUT
Carnival Corporation Ltd
CCL
$35.8B
| $86.5M | 0.05% |
3,469,400
-428,800
| -11% | -$10M |
|
188
CALL
General Motors
GM
$71.7B
| $84.6M | 0.05% |
1,587,300
+201,500
| +15% | +$10.6M |
|
189
CALL
Blackstone
BX
$152B
| $84.5M | 0.05% |
489,800
+20,300
| +4% | +$3.54M |
|
190
CALL
Lockheed Martin
LMT
$117B
| $84M | 0.05% |
172,800
-21,500
| -11% | -$11.7M |
|
|
X
191
CALL
DELISTED
US Steel
X
| $83.2M | 0.05% |
2,447,900
+474,700
| +24% | +$17.5M |
|
192
PUT
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$247M
| $83.1M | 0.05% |
2,171,300
-338,000
| -13% | -$10.2M |
|
193
PUT
Lam Research
LRCX
$403B
| $82.9M | 0.05% |
1,147,200
+17,200
| +2% | +$1.3M |
|
194
CALL
AT&T
T
$155B
| $82.7M | 0.05% |
3,630,700
-172,200
| -5% | -$3.88M |
|
|
195
Strategy Inc
MSTR
$37B
| $82.5M | 0.05% |
+285,022
| New | +$85.8M |
|
|
196
PUT
Blackstone
BX
$152B
| $81.8M | 0.05% |
474,500
-146,000
| -24% | -$25.4M |
|
197
PUT
Target
TGT
$63.4B
| $81.6M | 0.05% |
603,400
-124,700
| -17% | -$17.9M |
|
198
PUT
Delta Air Lines
DAL
$55.7B
| $81.3M | 0.05% |
1,344,300
+287,200
| +27% | +$17M |
|
199
PUT
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $80.7M | 0.05% |
620,600
-28,500
| -4% | -$829K |
|
200
CALL
Morgan Stanley
MS
$340B
| $80.7M | 0.05% |
641,800
-186,700
| -23% | -$23M |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.