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 | |
|---|---|---|---|---|---|---|
3776
TORM
TRMD
$3.05B
| $317K | ﹤0.01% |
10,201
-603
| -6% | -$18.3K |
|
3777
PUT
Azenta
AZTA
$1.33B
| $316K | ﹤0.01% |
7,100
-3,400
| -32% | -$168K |
|
|
BAND
3778
PUT
Bandwidth Inc
BAND
$1.67B
| $316K | ﹤0.01% |
20,800
+17,500
| +530% | +$352K |
|
3779
CALL
Gerdau
GGB
$9.7B
| $316K | ﹤0.01% |
77,040
-163,872
| -68% | -$734K |
|
|
SILV
3780
PUT
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $316K | ﹤0.01% |
44,300
-17,400
| -28% | -$107K |
|
3781
PUT
American Financial Group
AFG
$12B
| $315K | ﹤0.01% |
2,600
+2,400
| +1,200% | +$316K |
|
|
CIM
3782
PUT
Chimera Investment
CIM
$1.06B
| $315K | ﹤0.01% |
18,633
+5,800
| +45% | +$111K |
|
3783
Fresenius Medical Care
FMS
$13.3B
| $315K | ﹤0.01% |
14,860
-4,069
| -21% | -$77.9K |
|
3784
CALL
Golar LNG
GLNG
$4.95B
| $315K | ﹤0.01% |
14,600
-6,400
| -30% | -$143K |
|
|
EFOR
3785
PUT
Everforth Inc
EFOR
$953M
| $314K | ﹤0.01% |
+3,800
| New | +$330K |
|
3786
PUT
Braze
BRZE
$2.83B
| $314K | ﹤0.01% |
9,100
-1,700
| -16% | -$52.9K |
|
|
JNPR
3787
DELISTED
Juniper Networks
JNPR
| $314K | ﹤0.01% |
+9,130
| New | +$289K |
|
3788
CALL
OFG Bancorp
OFG
$2.24B
| $314K | ﹤0.01% |
+12,600
| New | +$352K |
|
3789
CALL
Pangaea Logistics
PANL
$494M
| $314K | ﹤0.01% |
53,600
+13,700
| +34% | +$82.2K |
|
|
LICY
3790
PUT
DELISTED
Li-Cycle Holdings Corp.
LICY
| $314K | ﹤0.01% |
6,975
+2,300
| +49% | +$101K |
|
3791
PUT
Essex Property Trust
ESS
$18.9B
| $313K | ﹤0.01% |
1,500
-200
| -12% | -$44.1K |
|
3792
Innodata
INOD
$1.88B
| $313K | ﹤0.01% |
+36,678
| New | +$207K |
|
3793
CALL
Neurocrine Biosciences
NBIX
$18.4B
| $313K | ﹤0.01% |
3,100
-22,400
| -88% | -$2.33M |
|
3794
CALL
Westlake Corp
WLK
$9.24B
| $313K | ﹤0.01% |
2,700
-700
| -21% | -$80.8K |
|
|
3795
PUT
Westlake Corp
WLK
$9.24B
| $313K | ﹤0.01% |
2,700
-23,500
| -90% | -$2.71M |
|
|
VZIO
3796
CALL
DELISTED
VIZIO Holding Corp.
VZIO
| $313K | ﹤0.01% |
34,200
-41,600
| -55% | -$375K |
|
3797
PUT
Geron
GERN
$937M
| $312K | ﹤0.01% |
144,000
-17,700
| -11% | -$50.3K |
|
3798
Vertex
VERX
$2.14B
| $312K | ﹤0.01% |
+15,082
| New | +$233K |
|
|
EBIX
3799
PUT
DELISTED
Ebix Inc
EBIX
| $312K | ﹤0.01% |
23,700
+13,600
| +135% | +$237K |
|
3800
PUT
Algoma Steel
ASTL
$462M
| $311K | ﹤0.01% |
38,600
+23,600
| +157% | +$180K |
|
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.