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 | |
|---|---|---|---|---|---|---|
4026
PUT
Playboy Inc
PLBY
$141M
| $255K | ﹤0.01% |
128,800
+61,100
| +90% | +$152K |
|
4027
Vanguard S&P Small-Cap 600 ETF
VIOO
$4.18B
| $255K | ﹤0.01% |
2,872
+674
| +31% | +$61.7K |
|
4028
PUT
Willis Towers Watson
WTW
$29.9B
| $255K | ﹤0.01% |
1,100
+500
| +83% | +$121K |
|
4029
CALL
Denison Mines
DNN
$2.49B
| $254K | ﹤0.01% |
233,800
-882,300
| -79% | -$1.09M |
|
|
ESGR
4030
CALL
DELISTED
Enstar Group
ESGR
| $254K | ﹤0.01% |
+1,100
| New | +$260K |
|
4031
PUT
KB Financial Group
KB
$40.6B
| $254K | ﹤0.01% |
7,000
| – | – |
|
4032
PUT
Centrus Energy
LEU
$3.34B
| $254K | ﹤0.01% |
7,900
-2,300
| -23% | -$88.4K |
|
4033
CALL
Limoneira
LMNR
$245M
| $254K | ﹤0.01% |
15,300
+15,000
| +5,000% | +$219K |
|
4034
PUT
Old Republic International
ORI
$10.8B
| $254K | ﹤0.01% |
10,200
+1,900
| +23% | +$47.8K |
|
4035
CALL
PennantPark Floating Rate Capital
PFLT
$705M
| $254K | ﹤0.01% |
24,000
+22,800
| +1,900% | +$249K |
|
|
PLYA
4036
CALL
DELISTED
Playa Hotels & Resorts
PLYA
| $254K | ﹤0.01% |
26,500
+25,100
| +1,793% | +$200K |
|
|
SF
4037
PUT
Stifel
SF
$12.8B
| $254K | ﹤0.01% |
6,450
+5,400
| +514% | +$227K |
|
4038
CALL
Select Water Solutions
WTTR
$2.24B
| $254K | ﹤0.01% |
36,500
+7,300
| +25% | +$56.8K |
|
|
TEN
4039
CALL
Tsakos Energy Navigation Ltd
TEN
$1.18B
| $254K | ﹤0.01% |
13,100
+5,800
| +79% | +$113K |
|
|
PRFT
4040
DELISTED
Perficient Inc
PRFT
| $254K | ﹤0.01% |
+3,527
| New | +$258K |
|
4041
PUT
Equinox Gold
EQX
$7.22B
| $253K | ﹤0.01% |
49,200
-10,600
| -18% | -$44.1K |
|
|
JBGS
4042
PUT
JBG SMITH
JBGS
$837M
| $253K | ﹤0.01% |
16,800
-4,300
| -20% | -$76.3K |
|
4043
PUT
Sally Beauty Holdings
SBH
$1.48B
| $253K | ﹤0.01% |
16,300
+4,400
| +37% | +$68.4K |
|
4044
ProShares UltraShort Bloomberg Crude Oil
SCO
$731M
| $253K | ﹤0.01% |
+2,516
| New | +$259K |
|
4045
PUT
BBVA Argentina
BBAR
$3.85B
| $252K | ﹤0.01% |
64,500
+39,800
| +161% | +$178K |
|
4046
Celanese
CE
$4.77B
| $252K | ﹤0.01% |
+2,317
| New | +$268K |
|
4047
CALL
Columbia Sportswear
COLM
$3.3B
| $252K | ﹤0.01% |
2,800
| – | – |
|
4048
DocGo
DCGO
$62.4M
| $252K | ﹤0.01% |
29,242
-16,187
| -36% | -$143K |
|
4049
CALL
Prosperity Bancshares
PB
$8.82B
| $252K | ﹤0.01% |
4,100
+2,700
| +193% | +$192K |
|
4050
PUT
Prothena Corp
PRTA
$448M
| $252K | ﹤0.01% |
5,200
-20,500
| -80% | -$1.08M |
|
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.