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 | |
|---|---|---|---|---|---|---|
|
NETI
4876
CALL
DELISTED
Eneti Inc.
NETI
| $128K | ﹤0.01% |
13,700
-4,300
| -24% | -$43K |
|
4877
CALL
Asure Software
ASUR
$242M
| $127K | ﹤0.01% |
8,800
+3,400
| +63% | +$40.1K |
|
|
CMRC
4878
CALL
Commerce.com Inc Series 1
CMRC
$272M
| $127K | ﹤0.01% |
14,300
-24,700
| -63% | -$250K |
|
4879
VanEck Brazil Small-Cap ETF
BRF
$21.5M
| $127K | ﹤0.01% |
9,498
+882
| +10% | +$12K |
|
4880
First Trust Dow Jones Internet Index Fund ETF
FDN
$4.99B
| $127K | ﹤0.01% |
859
-1,338
| -61% | -$185K |
|
4881
PUT
Healthcare Realty
HR
$7.56B
| $127K | ﹤0.01% |
6,600
-99,500
| -94% | -$2M |
|
4882
PUT
Imperial Oil
IMO
$62.3B
| $127K | ﹤0.01% |
2,500
-2,400
| -49% | -$120K |
|
4883
PUT
Itron
ITRI
$4.48B
| $127K | ﹤0.01% |
2,300
+2,200
| +2,200% | +$121K |
|
4884
Lightwave Logic
LWLG
$824M
| $127K | ﹤0.01% |
24,337
+9,120
| +60% | +$50.9K |
|
|
MCW
4885
CALL
DELISTED
Mister Car Wash
MCW
| $127K | ﹤0.01% |
14,800
-8,400
| -36% | -$78.7K |
|
4886
CALL
Materion
MTRN
$3.94B
| $127K | ﹤0.01% |
+1,100
| New | +$110K |
|
4887
PUT
Natera
NTRA
$36.4B
| $127K | ﹤0.01% |
2,300
-600
| -21% | -$28.8K |
|
4888
Powell Industries
POWL
$6.79B
| $127K | ﹤0.01% |
8,967
-1,938
| -18% | -$26.8K |
|
4889
PUT
Wolverine World Wide
WWW
$1.68B
| $127K | ﹤0.01% |
7,500
+2,500
| +50% | +$38.1K |
|
|
AFCG
4890
CALL
AFC Gamma
AFCG
$60.9M
| $126K | ﹤0.01% |
15,194
+9,642
| +174% | +$98K |
|
4891
PUT
AMC Global Media
AMCX
$450M
| $126K | ﹤0.01% |
7,200
+3,000
| +71% | +$56.1K |
|
|
BAND
4892
CALL
Bandwidth Inc
BAND
$1.19B
| $126K | ﹤0.01% |
8,300
-2,700
| -25% | -$54.3K |
|
4893
CALL
Cullen/Frost Bankers
CFR
$10.5B
| $126K | ﹤0.01% |
1,200
-1,500
| -56% | -$187K |
|
4894
GDS Holdings
GDS
$5.93B
| $126K | ﹤0.01% |
6,801
+4,259
| +168% | +$90.2K |
|
4895
PUT
KBR
KBR
$4.56B
| $126K | ﹤0.01% |
+2,300
| New | +$120K |
|
|
AMED
4896
CALL
DELISTED
Amedisys
AMED
| $125K | ﹤0.01% |
1,700
+400
| +31% | +$34.6K |
|
4897
CALL
Cardlytics
CDLX
$22.2M
| $125K | ﹤0.01% |
3,710
+3,210
| +642% | +$168K |
|
4898
PUT
Carlyle Secured Lending
CGBD
$708M
| $125K | ﹤0.01% |
9,200
-3,200
| -26% | -$47.1K |
|
4899
PUT
Eldorado Gold
EGO
$8.33B
| $125K | ﹤0.01% |
12,100
+10,600
| +707% | +$98.7K |
|
4900
CALL
Entravision Communication
EVC
$1.02B
| $125K | ﹤0.01% |
+20,700
| New | +$128K |
|
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.