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 | |
|---|---|---|---|---|---|---|
|
BZUN
6651
Baozun
BZUN
$173M
| $25K | ﹤0.01% |
4,292
-8,233
| -66% | -$54.3K |
|
6652
PUT
Coherus Oncology
CHRS
$227M
| $25K | ﹤0.01% |
3,700
-2,200
| -37% | -$17.1K |
|
6653
Conduent
CNDT
$245M
| $25K | ﹤0.01% |
+7,422
| New | +$30.5K |
|
6654
iShares GSCI Commodity Dynamic Roll Strategy ETF
COMT
$1.18B
| $25K | ﹤0.01% |
929
+418
| +82% | +$11.4K |
|
6655
PUT
Traeger
COOK
$171M
| $25K | ﹤0.01% |
122
-522
| -81% | -$93.4K |
|
6656
Castor Maritime
CTRM
$18.9M
| $25K | ﹤0.01% |
3,202
-1,059
| -25% | -$11.7K |
|
6657
Diana Shipping
DSX
$286M
| $25K | ﹤0.01% |
+8,235
| New | +$26.6K |
|
6658
CALL
Enerpac Tool Group
EPAC
$1.86B
| $25K | ﹤0.01% |
1,000
+600
| +150% | +$15.8K |
|
6659
CALL
Five Point Holdings
FPH
$383M
| $25K | ﹤0.01% |
+11,000
| New | +$25.8K |
|
6660
CALL
First Trust US Equity Opportunities ETF
FPX
$1.49B
| $25K | ﹤0.01% |
+300
| New | +$24.9K |
|
6661
PUT
Grocery Outlet
GO
$906M
| $25K | ﹤0.01% |
900
| – | – |
|
6662
Hain Celestial
HAIN
$44.4M
| $25K | ﹤0.01% |
+1,497
| New | +$27.3K |
|
|
6663
PUT
Hain Celestial
HAIN
$44.4M
| $25K | ﹤0.01% |
1,500
-4,200
| -74% | -$76.5K |
|
6664
CALL
Innoviva
INVA
$1.57B
| $25K | ﹤0.01% |
2,300
+400
| +21% | +$4.85K |
|
6665
PUT
KNOT Offshore Partners
KNOP
$358M
| $25K | ﹤0.01% |
4,700
+1,200
| +34% | +$7.71K |
|
6666
PUT
Mercury Insurance
MCY
$5.91B
| $25K | ﹤0.01% |
+800
| New | +$27.3K |
|
6667
CALL
Medallion Financial
MFIN
$233M
| $25K | ﹤0.01% |
3,300
-1,800
| -35% | -$14.5K |
|
|
MRCC
6668
CALL
DELISTED
Monroe Capital Corp
MRCC
| $25K | ﹤0.01% |
3,300
+1,000
| +43% | +$8.12K |
|
6669
MYR Group
MYRG
$5.15B
| $25K | ﹤0.01% |
+205
| New | +$22K |
|
6670
nCino
NCNO
$2.01B
| $25K | ﹤0.01% |
+1,017
| New | +$26.8K |
|
|
ADAM
6671
PUT
Adamas Trust
ADAM
$803M
| $25K | ﹤0.01% |
+2,600
| New | +$28.2K |
|
6672
CALL
OppFi
OPFI
$804M
| $25K | ﹤0.01% |
12,200
+11,700
| +2,340% | +$24.6K |
|
6673
Patria Investments
PAX
$1.77B
| $25K | ﹤0.01% |
+1,747
| New | +$26.6K |
|
6674
Avita Medical
RCEL
$138M
| $25K | ﹤0.01% |
1,845
-9,668
| -84% | -$103K |
|
6675
PUT
Ring Energy
REI
$315M
| $25K | ﹤0.01% |
13,200
-3,800
| -22% | -$8.19K |
|
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.