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 | |
|---|---|---|---|---|---|---|
76
PUT
CrowdStrike
CRWD
$195B
| $216M | 0.12% |
2,692,800
+644,800
| +31% | +$49.4M |
|
77
PUT
ASML
ASML
$692B
| $212M | 0.12% |
218,200
+34,100
| +19% | +$30.2M |
|
78
CALL
Qualcomm
QCOM
$183B
| $209M | 0.12% |
1,232,800
+107,700
| +10% | +$16.6M |
|
79
CALL
IBM
IBM
$198B
| $206M | 0.12% |
1,078,400
+338,100
| +46% | +$61.7M |
|
|
80
PUT
Alibaba
BABA
$283B
| $205M | 0.12% |
2,836,500
-661,500
| -19% | -$48.5M |
|
81
CALL
Uber
UBER
$146B
| $204M | 0.12% |
2,652,700
-116,300
| -4% | -$8.35M |
|
82
CALL
Oracle
ORCL
$366B
| $202M | 0.12% |
1,608,100
+521,700
| +48% | +$59.7M |
|
83
CALL
Arm
ARM
$309B
| $193M | 0.11% |
1,545,800
+634,900
| +70% | +$67.3M |
|
|
84
PUT
Uber
UBER
$146B
| $191M | 0.11% |
3,035,300
-323,600
| -10% | -$23.2M |
|
|
85
PUT
Pfizer
PFE
$142B
| $186M | 0.11% |
6,720,400
+1,674,100
| +33% | +$46.5M |
|
86
CALL
Visa
V
$677B
| $185M | 0.11% |
664,400
+147,500
| +29% | +$40.7M |
|
|
87
CALL
Intel
INTC
$530B
| $184M | 0.11% |
4,163,000
-524,200
| -11% | -$23.4M |
|
|
88
PUT
Intel
INTC
$530B
| $182M | 0.11% |
4,115,000
-1,039,200
| -20% | -$46.3M |
|
89
PUT
PayPal
PYPL
$49.3B
| $180M | 0.1% |
2,693,000
-862,900
| -24% | -$53M |
|
90
CALL
Goldman Sachs
GS
$320B
| $180M | 0.1% |
430,700
-161,600
| -27% | -$62.7M |
|
91
PUT
Caterpillar
CAT
$410B
| $178M | 0.1% |
485,700
-46,200
| -9% | -$14.8M |
|
92
PUT
Vanguard S&P 500 ETF
VOO
$981B
| $174M | 0.1% |
512,100
+111,900
| +28% | +$51.2M |
|
93
CALL
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $174M | 0.1% |
1,154,500
+61,900
| +6% | +$1.79M |
|
94
PUT
Pinduoduo
PDD
$121B
| $174M | 0.1% |
1,493,000
+51,300
| +4% | +$6.72M |
|
95
PUT
Nike
NKE
$63.7B
| $171M | 0.1% |
1,824,800
+230,500
| +14% | +$23.4M |
|
96
PUT
Chipotle Mexican Grill
CMG
$42.7B
| $168M | 0.1% |
2,890,000
-300,000
| -9% | -$15.3M |
|
97
CALL
Bank of America
BAC
$430B
| $167M | 0.1% |
4,407,600
-1,030,900
| -19% | -$35.4M |
|
|
98
PUT
Citigroup
C
$223B
| $166M | 0.1% |
2,888,900
-1,633,200
| -36% | -$90.9M |
|
99
CALL
iShares Silver Trust
SLV
$28.4B
| $166M | 0.1% |
7,282,600
-2,773,600
| -28% | -$59.2M |
|
|
100
CALL
Chipotle Mexican Grill
CMG
$42.7B
| $163M | 0.09% |
2,800,000
+570,000
| +26% | +$29.1M |
|
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.