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 | |
|---|---|---|---|---|---|---|
5651
PUT
Aurora
AUR
$12.6B
| $93K | ﹤0.01% |
33,100
+12,800
| +63% | +$36.7K |
|
5652
PUT
Blend Labs
BLND
$431M
| $93K | ﹤0.01% |
28,700
+27,700
| +2,770% | +$74.7K |
|
5653
PUT
Cohu
COHU
$2.26B
| $93K | ﹤0.01% |
2,800
+700
| +33% | +$22.8K |
|
5654
PUT
Community Health Systems
CYH
$393M
| $93K | ﹤0.01% |
26,700
+18,200
| +214% | +$61.5K |
|
5655
PUT
Fortune Brands Innovations
FBIN
$5.88B
| $93K | ﹤0.01% |
+1,100
| New | +$87.4K |
|
5656
PUT
Fulgent Genetics
FLGT
$470M
| $93K | ﹤0.01% |
4,300
-100
| -2% | -$2.48K |
|
5657
PUT
MiMedx Group
MDXG
$602M
| $93K | ﹤0.01% |
12,100
-5,500
| -31% | -$44.2K |
|
|
MTA
5658
Metalla Royalty & Streaming
MTA
$688M
| $93K | ﹤0.01% |
30,060
+5,694
| +23% | +$16.2K |
|
5659
PUT
Neumora Therapeutics
NMRA
$298M
| $93K | ﹤0.01% |
6,800
+6,500
| +2,167% | +$105K |
|
|
ORC
5660
PUT
Orchid Island Capital
ORC
$1.3B
| $93K | ﹤0.01% |
10,500
+1,300
| +14% | +$11.1K |
|
5661
Phillips Edison & Co
PECO
$5.46B
| $93K | ﹤0.01% |
+2,620
| New | +$92.6K |
|
5662
CALL
Planet Labs
PL
$7.3B
| $93K | ﹤0.01% |
36,600
-600
| -2% | -$1.36K |
|
5663
PUT
SouthState Bank Corp
SSB
$10.2B
| $93K | ﹤0.01% |
1,100
+800
| +267% | +$65.9K |
|
|
EXAI
5664
PUT
DELISTED
Exscientia Plc American Depositary Shares
EXAI
| $93K | ﹤0.01% |
16,400
+8,500
| +108% | +$52.8K |
|
5665
Atmos Energy
ATO
$28.8B
| $92K | ﹤0.01% |
776
+594
| +326% | +$68.1K |
|
|
CSGS
5666
PUT
DELISTED
CSG Systems International
CSGS
| $92K | ﹤0.01% |
+1,800
| New | +$93.5K |
|
|
5667
Fulgent Genetics
FLGT
$470M
| $92K | ﹤0.01% |
4,246
+1,779
| +72% | +$44.2K |
|
5668
PUT
Global Water Resources
GWRS
$206M
| $92K | ﹤0.01% |
7,200
| – | – |
|
5669
Heartland Express
HTLD
$948M
| $92K | ﹤0.01% |
7,776
+4,748
| +157% | +$60.4K |
|
5670
Inovio Pharmaceuticals
INO
$55.7M
| $92K | ﹤0.01% |
6,693
+5,745
| +606% | +$49.6K |
|
5671
CALL
Odyssey Marine Exploration
OMEX
$34.9M
| $92K | ﹤0.01% |
24,200
+23,400
| +2,925% | +$104K |
|
5672
PUT
Arcturus Therapeutics
ARCT
$164M
| $91K | ﹤0.01% |
2,700
-14,600
| -84% | -$517K |
|
5673
PUT
Brixmor Property Group
BRX
$9.67B
| $91K | ﹤0.01% |
3,900
+2,800
| +255% | +$63.5K |
|
5674
PUT
Cemex
CX
$17.1B
| $91K | ﹤0.01% |
10,200
+5,000
| +96% | +$40.1K |
|
5675
CALL
Granite Construction
GVA
$5.29B
| $91K | ﹤0.01% |
1,600
+600
| +60% | +$29.9K |
|
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.