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 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2151
PUT
East-West Bancorp
EWBC
$17.9B
| $2.59M | ﹤0.01% |
36,000
-53,600
| -60% | -$3.23M |
|
2152
PUT
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $2.59M | ﹤0.01% |
60,900
-135,200
| -69% | -$4.72M |
|
2153
CALL
Marriott Vacations Worldwide
VAC
$3.24B
| $2.59M | ﹤0.01% |
30,500
+8,800
| +41% | +$751K |
|
2154
Ventas
VTR
$48.9B
| $2.58M | ﹤0.01% |
51,860
+32,624
| +170% | +$1.46M |
|
2155
KE Holdings
BEKE
$16.8B
| $2.58M | ﹤0.01% |
159,167
+141,865
| +820% | +$2.19M |
|
|
SNCY
2156
PUT
DELISTED
Sun Country Airlines
SNCY
| $2.58M | ﹤0.01% |
163,800
+300
| +0.2% | +$4.42K |
|
2157
Freshpet
FRPT
$2.83B
| $2.57M | ﹤0.01% |
29,646
+15,835
| +115% | +$1.08M |
|
2158
CALL
Schrodinger
SDGR
$1.12B
| $2.57M | ﹤0.01% |
71,800
-1,100
| -2% | -$31.9K |
|
2159
KBR
KBR
$4.68B
| $2.57M | ﹤0.01% |
46,315
+19,028
| +70% | +$1.05M |
|
2160
CALL
Cabot Corp
CBT
$4.65B
| $2.56M | ﹤0.01% |
30,700
+23,900
| +351% | +$1.78M |
|
2161
CALL
Levi Strauss
LEVI
$9.44B
| $2.56M | ﹤0.01% |
154,800
+74,600
| +93% | +$1.11M |
|
2162
PUT
Copa Holdings
CPA
$5.56B
| $2.55M | ﹤0.01% |
24,000
+17,800
| +287% | +$1.63M |
|
2163
PUT
GXO Logistics
GXO
$6.06B
| $2.55M | ﹤0.01% |
41,700
+14,100
| +51% | +$790K |
|
|
GTLS
2164
CALL
DELISTED
Chart Industries
GTLS
| $2.55M | ﹤0.01% |
18,700
+1,700
| +10% | +$230K |
|
2165
CALL
Hecla Mining
HL
$10.2B
| $2.55M | ﹤0.01% |
529,800
+40,800
| +8% | +$180K |
|
2166
ConocoPhillips
COP
$147B
| $2.55M | ﹤0.01% |
+21,936
| New | +$2.57M |
|
2167
PUT
MINISO
MNSO
$3.64B
| $2.54M | ﹤0.01% |
124,800
+94,300
| +309% | +$2.26M |
|
2168
PUT
Rocket Companies
RKT
$36.9B
| $2.54M | ﹤0.01% |
175,500
+93,700
| +115% | +$897K |
|
2169
CALL
Kyndryl
KD
$2.66B
| $2.54M | ﹤0.01% |
122,200
+5,000
| +4% | +$85.4K |
|
2170
Invesco S&P 500 Low Volatility ETF
SPLV
$7.2B
| $2.54M | ﹤0.01% |
+40,525
| New | +$2.44M |
|
2171
PUT
Nabors Industries
NBR
$1.23B
| $2.54M | ﹤0.01% |
31,100
+26,700
| +607% | +$2.59M |
|
|
ARCH
2172
CALL
DELISTED
Arch Resources, Inc.
ARCH
| $2.54M | ﹤0.01% |
15,300
-9,900
| -39% | -$1.56M |
|
2173
PUT
Organon & Co
OGN
$3.55B
| $2.54M | ﹤0.01% |
175,800
+83,700
| +91% | +$1.14M |
|
2174
CALL
HealthEquity
HQY
$7.91B
| $2.53M | ﹤0.01% |
38,200
+33,600
| +730% | +$2.33M |
|
2175
PUT
Iron Mountain
IRM
$38.2B
| $2.53M | ﹤0.01% |
36,100
-17,100
| -32% | -$1.07M |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.