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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5601
Brilliant Earth
BRLT
$17.1M
| $66K | ﹤0.01% |
16,889
+5,409
| +47% | +$25.2K |
|
5602
CALL
CION Investment
CION
$297M
| $66K | ﹤0.01% |
6,700
+2,800
| +72% | +$29.3K |
|
5603
CALL
Daktronics
DAKT
$955M
| $66K | ﹤0.01% |
11,700
+8,200
| +234% | +$33.5K |
|
|
EB
5604
PUT
DELISTED
Eventbrite
EB
| $66K | ﹤0.01% |
7,800
+6,400
| +457% | +$52.8K |
|
5605
CALL
Evolus
EOLS
$385M
| $66K | ﹤0.01% |
7,900
+1,000
| +14% | +$9.04K |
|
5606
CALL
Globus Maritime Ltd
GLBS
$61.9M
| $66K | ﹤0.01% |
59,100
-500
| -0.8% | -$573 |
|
5607
PUT
Innovative Solutions & Support
ISSC
$327M
| $66K | ﹤0.01% |
9,100
+5,100
| +128% | +$41.2K |
|
5608
Kinetik
KNTK
$3.72B
| $66K | ﹤0.01% |
+2,121
| New | +$65.1K |
|
|
MTA
5609
Metalla Royalty & Streaming
MTA
$688M
| $66K | ﹤0.01% |
11,845
-6,836
| -37% | -$33.8K |
|
|
OTLY
5610
Oatly Group
OTLY
$465M
| $66K | ﹤0.01% |
1,370
-5,591
| -80% | -$261K |
|
5611
Paysign
PAYS
$501M
| $66K | ﹤0.01% |
18,341
+14,310
| +355% | +$48.9K |
|
|
RDHL
5612
CALL
Redhill Biopharma
RDHL
$3.95M
| $66K | ﹤0.01% |
648
+630
| +3,500% | +$119K |
|
5613
PUT
Talos Energy
TALO
$2.53B
| $66K | ﹤0.01% |
4,500
+700
| +18% | +$12.1K |
|
|
MRNS
5614
PUT
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $66K | ﹤0.01% |
9,700
-13,200
| -58% | -$82.8K |
|
|
GSP
5615
PUT
DELISTED
Barclays Bank PLC iPath Exchange Traded Notes due 2036 Linked to GSCI Total Return Index
GSP
| $66K | ﹤0.01% |
+2,100
| New | +$43.3K |
|
5616
CALL
AtaiBeckley Inc
ATAI
$2.66B
| $65K | ﹤0.01% |
36,300
+32,400
| +831% | +$54.9K |
|
5617
PUT
Banco Macro
BMA
$5.88B
| $65K | ﹤0.01% |
3,700
-11,400
| -75% | -$226K |
|
5618
PUT
Cathay General Bancorp
CATY
$4.22B
| $65K | ﹤0.01% |
1,900
+1,800
| +1,800% | +$73.9K |
|
5619
CALL
Helios Technologies
HLIO
$2.57B
| $65K | ﹤0.01% |
1,000
+800
| +400% | +$52K |
|
5620
CALL
Humacyte
HUMA
$176M
| $65K | ﹤0.01% |
21,300
+18,900
| +788% | +$53.7K |
|
5621
CALL
Lightwave Logic
LWLG
$995M
| $65K | ﹤0.01% |
12,600
-11,100
| -47% | -$61.9K |
|
5622
PUT
Methanex
MEOH
$4.3B
| $65K | ﹤0.01% |
1,400
+600
| +75% | +$28.2K |
|
5623
ProShares K-1 Free Crude Oil Strategy ETF
OILK
$207M
| $65K | ﹤0.01% |
1,531
-5,053
| -77% | -$216K |
|
5624
PUT
Phillips Edison & Co
PECO
$5.46B
| $65K | ﹤0.01% |
2,000
| – | – |
|
5625
CALL
Outdoor Holding Co
POWW
$249M
| $65K | ﹤0.01% |
33,200
-32,500
| -49% | -$67.2K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.