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 | |
|---|---|---|---|---|---|---|
2601
CALL
Trex
TREX
$4.51B
| $1.65M | ﹤0.01% |
16,500
+6,700
| +68% | +$597K |
|
2602
CALL
Pinnacle West Capital
PNW
$12.9B
| $1.64M | ﹤0.01% |
22,000
+8,600
| +64% | +$606K |
|
2603
Allegiant Air
ALGT
$2.64B
| $1.64M | ﹤0.01% |
21,854
+18,797
| +615% | +$1.43M |
|
2604
PUT
Allegion
ALLE
$13B
| $1.64M | ﹤0.01% |
12,200
+11,400
| +1,425% | +$1.46M |
|
2605
CALL
Cheesecake Factory
CAKE
$4.21B
| $1.64M | ﹤0.01% |
45,400
-24,300
| -35% | -$845K |
|
2606
Devon Energy
DVN
$51.9B
| $1.64M | ﹤0.01% |
32,718
-57,223
| -64% | -$2.54M |
|
2607
HDFC Bank
HDB
$119B
| $1.64M | ﹤0.01% |
+58,466
| New | +$1.66M |
|
2608
CALL
Transmedics
TMDX
$2.5B
| $1.63M | ﹤0.01% |
22,100
+14,900
| +207% | +$1.23M |
|
2609
CALL
Everest Group
EG
$15.2B
| $1.63M | ﹤0.01% |
4,100
-5,300
| -56% | -$1.99M |
|
|
AKRO
2610
CALL
DELISTED
Akero Therapeutics
AKRO
| $1.63M | ﹤0.01% |
64,400
-13,600
| -17% | -$327K |
|
2611
PUT
MYR Group
MYRG
$5.9B
| $1.63M | ﹤0.01% |
9,200
+9,100
| +9,100% | +$1.4M |
|
|
GOOS
2612
PUT
Canada Goose Holdings
GOOS
$868M
| $1.63M | ﹤0.01% |
134,800
+74,400
| +123% | +$924K |
|
|
EU
2613
CALL
enCore Energy
EU
$221M
| $1.62M | ﹤0.01% |
370,700
+240,000
| +184% | +$1.02M |
|
2614
PUT
Canadian Pacific Kansas City
CP
$82B
| $1.62M | ﹤0.01% |
18,400
-33,200
| -64% | -$2.79M |
|
2615
CALL
Bumble
BMBL
$367M
| $1.62M | ﹤0.01% |
142,600
+21,400
| +18% | +$273K |
|
2616
PUT
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.9B
| $1.61M | ﹤0.01% |
56,900
-10,700
| -16% | -$268K |
|
|
NVMI
2617
CALL
Nova
NVMI
$13.9B
| $1.61M | ﹤0.01% |
9,100
-21,500
| -70% | -$3.39M |
|
2618
PUT
CryoPort
CYRX
$775M
| $1.61M | ﹤0.01% |
91,000
+13,600
| +18% | +$215K |
|
2619
CALL
VeriSign
VRSN
$25.3B
| $1.61M | ﹤0.01% |
8,500
-2,900
| -25% | -$570K |
|
2620
PUT
American Superconductor
AMSC
$1.48B
| $1.61M | ﹤0.01% |
119,100
+52,800
| +80% | +$655K |
|
2621
PUT
Carter's
CRI
$1.43B
| $1.61M | ﹤0.01% |
19,000
+18,600
| +4,650% | +$1.48M |
|
|
DAY
2622
PUT
DELISTED
Dayforce
DAY
| $1.61M | ﹤0.01% |
24,300
-10,500
| -30% | -$717K |
|
2623
CALL
CoreCivic
CXW
$3.1B
| $1.61M | ﹤0.01% |
103,000
+2,500
| +2% | +$36.4K |
|
2624
CALL
Gaming and Leisure Properties
GLPI
$12.8B
| $1.61M | ﹤0.01% |
34,900
-56,700
| -62% | -$2.61M |
|
2625
CALL
BigBear.ai
BBAI
$1.32B
| $1.61M | ﹤0.01% |
783,600
+548,000
| +233% | +$1.21M |
|
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.