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 | |
|---|---|---|---|---|---|---|
651
CALL
Crown Castle
CCI
$32.6B
| $22M | 0.01% |
207,900
-32,500
| -14% | -$3.54M |
|
652
PUT
Builders FirstSource
BLDR
$7.59B
| $22M | 0.01% |
105,400
-79,800
| -43% | -$14.7M |
|
|
CGC
653
CALL
Canopy Growth
CGC
$381M
| $21.9M | 0.01% |
2,539,500
-504,300
| -17% | -$2.18M |
|
654
PUT
BP
BP
$113B
| $21.9M | 0.01% |
581,100
-258,800
| -31% | -$9.28M |
|
655
PUT
Archer Daniels Midland
ADM
$41.6B
| $21.6M | 0.01% |
344,000
+215,500
| +168% | +$12.6M |
|
656
PUT
Emerson Electric
EMR
$81.2B
| $21.5M | 0.01% |
189,800
+78,000
| +70% | +$8.01M |
|
657
CALL
Prologis
PLD
$135B
| $21.5M | 0.01% |
165,200
+38,600
| +30% | +$5.04M |
|
658
CALL
Atlassian
TEAM
$20.3B
| $21.4M | 0.01% |
109,700
-93,900
| -46% | -$20.5M |
|
659
CALL
KE Holdings
BEKE
$17.8B
| $21.4M | 0.01% |
1,558,200
+592,200
| +61% | +$8.27M |
|
660
PUT
CF Industries
CF
$19.5B
| $21.4M | 0.01% |
256,900
+11,500
| +5% | +$917K |
|
661
PUT
Domino's
DPZ
$10.7B
| $21.3M | 0.01% |
42,900
-58,000
| -57% | -$25.2M |
|
662
CALL
Pultegroup
PHM
$23.7B
| $21.3M | 0.01% |
176,700
-121,400
| -41% | -$13M |
|
663
CALL
CME Group
CME
$91.9B
| $21.3M | 0.01% |
98,900
+43,000
| +77% | +$9.03M |
|
664
PUT
Altria Group
MO
$120B
| $21.2M | 0.01% |
486,200
+164,300
| +51% | +$6.81M |
|
665
CALL
Generac Holdings
GNRC
$12.4B
| $21.2M | 0.01% |
167,800
-50,000
| -23% | -$5.86M |
|
666
PUT
Constellation Brands
STZ
$22.1B
| $21.1M | 0.01% |
77,800
-57,400
| -42% | -$14.5M |
|
667
PUT
Jabil
JBL
$33.7B
| $21.1M | 0.01% |
157,400
+79,700
| +103% | +$10.7M |
|
668
CALL
Ross Stores
ROST
$74.6B
| $21.1M | 0.01% |
143,500
+65,200
| +83% | +$9.34M |
|
669
PUT
Caesars Entertainment
CZR
$6.09B
| $21.1M | 0.01% |
481,400
-136,100
| -22% | -$5.89M |
|
670
PUT
Ralph Lauren
RL
$22.1B
| $21M | 0.01% |
111,800
+39,200
| +54% | +$6.49M |
|
671
CALL
APA Corp
APA
$12.9B
| $20.9M | 0.01% |
609,300
+25,000
| +4% | +$792K |
|
672
CALL
Las Vegas Sands
LVS
$30.5B
| $20.8M | 0.01% |
403,000
-280,900
| -41% | -$14.5M |
|
|
SWAV
673
PUT
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $20.8M | 0.01% |
63,900
+21,000
| +49% | +$5.16M |
|
674
PUT
Canadian Natural Resources
CNQ
$98.1B
| $20.7M | 0.01% |
543,400
+91,200
| +20% | +$3.05M |
|
675
CALL
CRISPR Therapeutics
CRSP
$4.68B
| $20.7M | 0.01% |
304,100
+54,100
| +22% | +$3.87M |
|
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.