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 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
TPC
6401
PUT
Tutor Perini Cor
TPC
$4.03B
| $36K | ﹤0.01% |
4,000
+2,700
| +208% | +$21.5K |
|
|
EQC
6402
PUT
DELISTED
Equity Commonwealth
EQC
| $36K | ﹤0.01% |
+1,900
| New | +$35.9K |
|
|
TBNK
6403
CALL
DELISTED
Territorial Bancorp Inc.
TBNK
| $36K | ﹤0.01% |
+3,300
| New | +$28.1K |
|
|
TDCX
6404
DELISTED
TDCX Inc. American Depositary Shares, each representing one Class A ordinary share
TDCX
| $36K | ﹤0.01% |
7,541
+7,447
| +7,922% | +$36.5K |
|
|
SLGC
6405
CALL
DELISTED
SomaLogic, Inc. Class A Common Stock
SLGC
| $36K | ﹤0.01% |
65,500
+64,800
| +9,257% | +$151K |
|
6406
Apyx Medical
APYX
$162M
| $35K | ﹤0.01% |
+13,363
| New | +$32.4K |
|
6407
Axogen
AXGN
$2.2B
| $35K | ﹤0.01% |
+5,199
| New | +$28.9K |
|
6408
PUT
Breakwave Tanker Shipping ETF
BWET
$33.4M
| $35K | ﹤0.01% |
3,100
+2,300
| +288% | +$38.1K |
|
6409
PUT
Chefs' Warehouse
CHEF
$4.31B
| $35K | ﹤0.01% |
1,200
-2,800
| -70% | -$67.6K |
|
|
CSGS
6410
DELISTED
CSG Systems International
CSGS
| $35K | ﹤0.01% |
+663
| New | +$34K |
|
6411
PUT
CareTrust REIT
CTRE
$10B
| $35K | ﹤0.01% |
1,600
-100
| -6% | -$2.21K |
|
6412
PUT
DocGo
DCGO
$64.2M
| $35K | ﹤0.01% |
6,400
-3,800
| -37% | -$21.8K |
|
|
DOO
6413
CALL
Bombardier Recreational Products
DOO
$4.48B
| $35K | ﹤0.01% |
500
-6,300
| -93% | -$441K |
|
6414
Excelerate Energy
EE
$1.19B
| $35K | ﹤0.01% |
2,300
+2,203
| +2,271% | +$35.4K |
|
6415
EverQuote
EVER
$949M
| $35K | ﹤0.01% |
2,916
+2,122
| +267% | +$19.3K |
|
6416
Eve Holding
EVEX
$777M
| $35K | ﹤0.01% |
+4,864
| New | +$36K |
|
6417
CALL
Gladstone Investment Corp
GAIN
$642M
| $35K | ﹤0.01% |
2,500
+1,400
| +127% | +$19.3K |
|
6418
PUT
Genesco
GCO
$434M
| $35K | ﹤0.01% |
1,000
-1,400
| -58% | -$43K |
|
|
HI
6419
DELISTED
Hillenbrand
HI
| $35K | ﹤0.01% |
+736
| New | +$30.2K |
|
6420
Heron Therapeutics
HRTX
$93.4M
| $35K | ﹤0.01% |
+20,598
| New | +$22.7K |
|
6421
CALL
Mitsubishi UFJ Financial
MUFG
$247B
| $35K | ﹤0.01% |
4,100
-3,100
| -43% | -$26.1K |
|
6422
PUT
Newmark Group
NMRK
$2.64B
| $35K | ﹤0.01% |
3,200
+3,000
| +1,500% | +$22.7K |
|
6423
Nu Skin
NUS
$257M
| $35K | ﹤0.01% |
1,818
+724
| +66% | +$13.4K |
|
6424
Ondas Inc
ONDS
$3.87B
| $35K | ﹤0.01% |
22,924
+4,702
| +26% | +$4.06K |
|
6425
PUT
OppFi
OPFI
$813M
| $35K | ﹤0.01% |
7,000
-15,000
| -68% | -$47.8K |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.