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 | |
|---|---|---|---|---|---|---|
7776
PUT
Armstrong World Industries
AWI
$7.68B
| $7K | ﹤0.01% |
+100
| New | +$7.49K |
|
7777
AXIS Capital
AXS
$7.3B
| $7K | ﹤0.01% |
+129
| New | +$7.49K |
|
7778
AZZ Inc
AZZ
$4.52B
| $7K | ﹤0.01% |
+171
| New | +$7.01K |
|
7779
PUT
Bally's
BALY
$660M
| $7K | ﹤0.01% |
+400
| New | +$7.85K |
|
|
BCTX
7780
Briacell Therapeutics
BCTX
$29.9M
| $7K | ﹤0.01% |
7
-186
| -96% | -$193K |
|
7781
CALL
Backblaze
BLZE
$1.26B
| $7K | ﹤0.01% |
1,500
-45,700
| -97% | -$277K |
|
7782
CALL
Bassett Furniture
BSET
$170M
| $7K | ﹤0.01% |
400
+300
| +300% | +$5.57K |
|
|
SLAI
7783
DELISTED
SOLAI Ltd ADS
SLAI
| $7K | ﹤0.01% |
420
-118
| -22% | -$2.36K |
|
7784
CALL
Bioventus
BVS
$1.17B
| $7K | ﹤0.01% |
+7,200
| New | +$13.8K |
|
|
7785
Bioventus
BVS
$1.17B
| $7K | ﹤0.01% |
6,848
+5,972
| +682% | +$11.4K |
|
7786
BuzzFeed
BZFD
$95M
| $7K | ﹤0.01% |
1,712
+1,113
| +186% | +$6.33K |
|
7787
PUT
China Automotive Systems
CAAS
$142M
| $7K | ﹤0.01% |
1,400
-4,400
| -76% | -$30.9K |
|
7788
PUT
CareDx
CDNA
$2.45B
| $7K | ﹤0.01% |
800
-15,600
| -95% | -$200K |
|
7789
PUT
Grupo Cibest SA
CIB
$22.7B
| $7K | ﹤0.01% |
+300
| New | +$8.1K |
|
7790
Core & Main
CNM
$8.64B
| $7K | ﹤0.01% |
306
-515
| -63% | -$11.3K |
|
7791
Cogent Biosciences
COGT
$6.47B
| $7K | ﹤0.01% |
679
-1,250
| -65% | -$16K |
|
7792
Traeger
COOK
$166M
| $7K | ﹤0.01% |
38
-326
| -90% | -$58.3K |
|
7793
First Trust SkyBridge Crypto Industry and Digital Economy ETF
CRPT
$82.4M
| $7K | ﹤0.01% |
1,579
-544
| -26% | -$2.4K |
|
7794
CALL
Cyclerion Therapeutics
CYCN
$18.3M
| $7K | ﹤0.01% |
810
-1,285
| -61% | -$16.2K |
|
7795
CALL
CryoPort
CYRX
$766M
| $7K | ﹤0.01% |
300
-9,000
| -97% | -$196K |
|
7796
CALL
DNOW Inc
DNOW
$2.95B
| $7K | ﹤0.01% |
700
-2,200
| -76% | -$27.5K |
|
|
DSL
7797
PUT
DoubleLine Income Solutions Fund
DSL
$1.24B
| $7K | ﹤0.01% |
700
-700
| -50% | -$8.35K |
|
7798
Eastern Bankshares
EBC
$5.37B
| $7K | ﹤0.01% |
+569
| New | +$8.77K |
|
7799
Empire State Realty Trust
ESRT
$836M
| $7K | ﹤0.01% |
+1,163
| New | +$8.52K |
|
7800
EverCommerce
EVCM
$1.79B
| $7K | ﹤0.01% |
+680
| New | +$6.57K |
|
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 3,663 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 1,728 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.