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 | |
|---|---|---|---|---|---|---|
3251
CALL
Alkami Technology
ALKT
$1.9B
| $506K | ﹤0.01% |
40,000
+38,600
| +2,757% | +$570K |
|
3252
PUT
Nutanix
NTNX
$15.4B
| $506K | ﹤0.01% |
19,500
-249,500
| -93% | -$6.75M |
|
3253
PUT
Full Truck Alliance
YMM
$9.66B
| $506K | ﹤0.01% |
66,600
+50,900
| +324% | +$403K |
|
3254
Invesco DB Agriculture Fund
DBA
$1.23B
| $505K | ﹤0.01% |
+24,731
| New | +$494K |
|
3255
Noodles & Co
NDLS
$84M
| $505K | ﹤0.01% |
+13,033
| New | +$595K |
|
3256
Camping World
CWH
$389M
| $503K | ﹤0.01% |
24,109
+11,046
| +85% | +$258K |
|
3257
State Street SPDR S&P Insurance ETF
KIE
$654M
| $503K | ﹤0.01% |
12,786
+2,142
| +20% | +$89.2K |
|
|
RC
3258
CALL
Ready Capital
RC
$265M
| $502K | ﹤0.01% |
49,400
+17,400
| +54% | +$203K |
|
3259
PUT
Blackstone Secured Lending
BXSL
$5.35B
| $501K | ﹤0.01% |
20,100
+15,000
| +294% | +$368K |
|
|
OBE
3260
CALL
Obsidian Energy
OBE
$660M
| $501K | ﹤0.01% |
78,400
-5,500
| -7% | -$35.8K |
|
3261
PUT
Impinj
PI
$3.97B
| $501K | ﹤0.01% |
3,700
-13,700
| -79% | -$1.75M |
|
|
RVNC
3262
DELISTED
Revance Therapeutics, Inc.
RVNC
| $501K | ﹤0.01% |
15,581
+2,260
| +17% | +$70.5K |
|
3263
Chefs' Warehouse
CHEF
$3.9B
| $500K | ﹤0.01% |
14,686
+9,296
| +172% | +$327K |
|
3264
Innovative Industrial Properties
IIPR
$1.78B
| $500K | ﹤0.01% |
+6,582
| New | +$581K |
|
|
MNTV
3265
DELISTED
Momentive Global Inc. Common Stock
MNTV
| $499K | ﹤0.01% |
53,589
+34,545
| +181% | +$271K |
|
3266
PUT
Agios Pharmaceuticals
AGIO
$2.2B
| $498K | ﹤0.01% |
21,700
-33,200
| -60% | -$882K |
|
3267
Payoneer
PAYO
$2.41B
| $498K | ﹤0.01% |
79,374
+77,400
| +3,921% | +$460K |
|
3268
Bausch Health
BHC
$1.67B
| $497K | ﹤0.01% |
+61,360
| New | +$493K |
|
|
ACB
3269
CALL
Aurora Cannabis
ACB
$170M
| $496K | ﹤0.01% |
71,230
-139,980
| -66% | -$1.22M |
|
3270
Clearfield
CLFD
$436M
| $496K | ﹤0.01% |
+10,666
| New | +$687K |
|
3271
CALL
Huntington Ingalls Industries
HII
$11.4B
| $496K | ﹤0.01% |
2,400
-1,400
| -37% | -$303K |
|
3272
CALL
Arcutis Biotherapeutics
ARQT
$3.48B
| $495K | ﹤0.01% |
45,000
-5,000
| -10% | -$72.3K |
|
3273
Fortuna Silver Mines
FSM
$2.59B
| $495K | ﹤0.01% |
129,728
+122,753
| +1,760% | +$436K |
|
3274
CALL
InterDigital
IDCC
$6.7B
| $495K | ﹤0.01% |
6,800
+5,100
| +300% | +$355K |
|
3275
PUT
Edison International
EIX
$30.3B
| $494K | ﹤0.01% |
7,000
-16,200
| -70% | -$1.09M |
|
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.