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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
176
PUT
First Solar
FSLR
$22.1B
| $99.9M | 0.06% |
591,700
-349,800
| -37% | -$53.8M |
|
177
CALL
JD.com
JD
$41.1B
| $99.8M | 0.06% |
3,644,400
+553,300
| +18% | +$13.5M |
|
178
CALL
Humana
HUM
$47.8B
| $99.4M | 0.06% |
286,800
+144,700
| +102% | +$54.8M |
|
179
CALL
Texas Instruments
TXN
$265B
| $99.1M | 0.06% |
568,900
-23,400
| -4% | -$3.9M |
|
180
CALL
American Express
AXP
$240B
| $98.6M | 0.06% |
432,900
+8,300
| +2% | +$1.72M |
|
181
CALL
Morgan Stanley
MS
$340B
| $97.6M | 0.06% |
1,036,100
-443,300
| -30% | -$39M |
|
182
PUT
General Motors
GM
$71.7B
| $97.5M | 0.06% |
2,150,600
-762,000
| -26% | -$29.5M |
|
183
CALL
Proshares UltraShort Technology
REW
$3.27M
| $97.3M | 0.06% |
694,200
+9,100
| +1% | +$534K |
|
184
PUT
Delta Air Lines
DAL
$55.7B
| $97.1M | 0.06% |
2,028,300
-170,200
| -8% | -$7.04M |
|
185
CALL
Johnson & Johnson
JNJ
$599B
| $97M | 0.06% |
613,200
-82,200
| -12% | -$13.1M |
|
186
CALL
Vanguard S&P 500 ETF
VOO
$981B
| $96.8M | 0.06% |
358,100
-72,700
| -17% | -$33.3M |
|
187
PUT
Synopsys
SNPS
$74.5B
| $96.6M | 0.06% |
169,000
+106,500
| +170% | +$58.6M |
|
188
CALL
Merck
MRK
$312B
| $96.4M | 0.06% |
730,500
+193,900
| +36% | +$23.9M |
|
189
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $96M | 0.06% |
2,874,900
+528,500
| +23% | +$12.6M |
|
190
PUT
CVS Health
CVS
$137B
| $94.7M | 0.05% |
1,187,000
+629,400
| +113% | +$48.1M |
|
191
PUT
Ulta Beauty
ULTA
$21B
| $94.5M | 0.05% |
180,800
+16,700
| +10% | +$8.63M |
|
192
CALL
Dell
DELL
$261B
| $93.9M | 0.05% |
823,000
+483,400
| +142% | +$45.1M |
|
|
193
PUT
Johnson & Johnson
JNJ
$599B
| $93M | 0.05% |
588,200
-101,100
| -15% | -$16.1M |
|
194
PUT
Lowe's Companies
LOW
$115B
| $89.9M | 0.05% |
353,000
+79,000
| +29% | +$18.2M |
|
195
PUT
Cloudflare
NET
$96.7B
| $89.8M | 0.05% |
927,200
+499,500
| +117% | +$45.2M |
|
196
CALL
PepsiCo
PEP
$184B
| $89M | 0.05% |
508,400
+176,100
| +53% | +$29.6M |
|
197
CALL
American Tower
AMT
$77.8B
| $89M | 0.05% |
450,200
+18,500
| +4% | +$3.68M |
|
198
PUT
Carnival Corporation Ltd
CCL
$35.8B
| $88.9M | 0.05% |
5,442,400
+982,500
| +22% | +$16M |
|
199
PUT
Verizon
VZ
$183B
| $88.3M | 0.05% |
2,103,500
+138,800
| +7% | +$5.6M |
|
|
SCHW
200
PUT
Charles Schwab
SCHW
$174B
| $88M | 0.05% |
1,216,300
-276,600
| -19% | -$18.2M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.