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 | |
|---|---|---|---|---|---|---|
6401
CALL
Semtech
SMTC
$11B
| $33K | ﹤0.01% |
1,400
+400
| +40% | +$12.5K |
|
|
TVRD
6402
CALL
Tvardi Therapeutics
TVRD
$19.7M
| $33K | ﹤0.01% |
192
-183
| -49% | -$61.3K |
|
|
FREE
6403
CALL
DELISTED
Whole Earth Brands, Inc. Class A Common Stock
FREE
| $33K | ﹤0.01% |
+13,200
| New | +$45.1K |
|
|
HLTH
6404
CALL
DELISTED
Cue Health Inc. Common Stock
HLTH
| $33K | ﹤0.01% |
18,200
-1,500
| -8% | -$3.26K |
|
|
AUY
6405
CALL
DELISTED
Yamana Gold, Inc.
AUY
| $33K | ﹤0.01% |
65,700
-15,700
| -19% | -$89.3K |
|
6406
CALL
Alector
ALEC
$168M
| $32K | ﹤0.01% |
5,200
+1,400
| +37% | +$11.4K |
|
6407
PUT
Allegion
ALLE
$13.4B
| $32K | ﹤0.01% |
300
+200
| +200% | +$22.4K |
|
6408
PUT
BARK
BARK
$81.8M
| $32K | ﹤0.01% |
1,105
-195
| -15% | -$6.18K |
|
6409
BBVA Argentina
BBAR
$3.87B
| $32K | ﹤0.01% |
8,220
-121
| -1% | -$542 |
|
6410
PUT
Brown-Forman Class B
BF.B
$13.2B
| $32K | ﹤0.01% |
500
-4,900
| -91% | -$318K |
|
6411
CALL
Brady Corp
BRC
$4.44B
| $32K | ﹤0.01% |
600
+500
| +500% | +$26.2K |
|
6412
CALL
Clear Channel Outdoor Holdings
CCO
$1.23B
| $32K | ﹤0.01% |
27,000
+26,000
| +2,600% | +$38.3K |
|
6413
CALL
Celcuity
CELC
$4.21B
| $32K | ﹤0.01% |
+3,200
| New | +$35.1K |
|
6414
Definitive Healthcare
DH
$72M
| $32K | ﹤0.01% |
+3,190
| New | +$37.6K |
|
6415
PUT
Entergy
ETR
$50.2B
| $32K | ﹤0.01% |
600
+400
| +200% | +$21.2K |
|
6416
Immunome
IMNM
$2.58B
| $32K | ﹤0.01% |
6,423
+453
| +8% | +$2.21K |
|
|
INFA
6417
PUT
DELISTED
Informatica
INFA
| $32K | ﹤0.01% |
2,000
+1,800
| +900% | +$30.6K |
|
|
ISPO
6418
DELISTED
Inspirato
ISPO
| $32K | ﹤0.01% |
+1,706
| New | +$39.5K |
|
6419
Moelis & Co
MC
$4.97B
| $32K | ﹤0.01% |
+838
| New | +$36K |
|
6420
Medpace
MEDP
$16.1B
| $32K | ﹤0.01% |
+175
| New | +$36.2K |
|
6421
Puma Biotechnology
PBYI
$404M
| $32K | ﹤0.01% |
+10,367
| New | +$39.1K |
|
6422
CALL
Rentokil
RTO
$11.8B
| $32K | ﹤0.01% |
900
+500
| +125% | +$15.8K |
|
|
CDMO
6423
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $32K | ﹤0.01% |
+1,731
| New | +$28.4K |
|
|
CAMP
6424
DELISTED
CalAmp Corp.
CAMP
| $32K | ﹤0.01% |
388
-5,880
| -94% | -$574K |
|
|
SCPL
6425
CALL
DELISTED
SciPlay Corporation Class A Common Stock
SCPL
| $32K | ﹤0.01% |
1,900
+400
| +27% | +$6.56K |
|
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.