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 | |
|---|---|---|---|---|---|---|
4076
Garrett Motion
GTX
$5.6B
| $346K | ﹤0.01% |
35,788
-170,649
| -83% | -$1.32M |
|
4077
PUT
ITT
ITT
$17.8B
| $346K | ﹤0.01% |
2,900
+2,200
| +314% | +$231K |
|
4078
Ramaco Resources Class A
METC
$637M
| $346K | ﹤0.01% |
20,864
+20,683
| +11,427% | +$287K |
|
4079
CALL
Arvinas
ARVN
$529M
| $345K | ﹤0.01% |
8,400
+2,200
| +35% | +$51.4K |
|
4080
PUT
Sotera Health
SHC
$5.06B
| $345K | ﹤0.01% |
20,500
-3,800
| -16% | -$53.8K |
|
4081
PUT
Crescent Energy
CRGY
$3.44B
| $343K | ﹤0.01% |
26,000
+19,300
| +288% | +$228K |
|
4082
CALL
3D Systems Corp
DDD
$412M
| $343K | ﹤0.01% |
54,100
-20,000
| -27% | -$98.6K |
|
4083
Kimberly-Clark
KMB
$37.5B
| $343K | ﹤0.01% |
2,830
-11,852
| -81% | -$1.43M |
|
4084
CALL
Morningstar
MORN
$7.38B
| $343K | ﹤0.01% |
1,200
-300
| -20% | -$78.2K |
|
|
MDRX
4085
CALL
DELISTED
Veradigm Inc. Common Stock
MDRX
| $343K | ﹤0.01% |
32,700
+32,600
| +32,600% | +$400K |
|
|
GOL
4086
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $343K | ﹤0.01% |
94,878
+29,915
| +46% | +$98.4K |
|
4087
Camden Property Trust
CPT
$11.4B
| $342K | ﹤0.01% |
+3,446
| New | +$319K |
|
4088
The Honest Company
HNST
$421M
| $342K | ﹤0.01% |
103,888
+45,340
| +77% | +$82.7K |
|
4089
CALL
Globus Medical
GMED
$10.9B
| $341K | ﹤0.01% |
6,400
-7,500
| -54% | -$366K |
|
|
VSXY
4090
Victoria's Secret
VSXY
$7.1B
| $341K | ﹤0.01% |
+12,854
| New | +$273K |
|
|
FPI
4091
PUT
Farmland Partners
FPI
$417M
| $340K | ﹤0.01% |
27,300
+14,800
| +118% | +$171K |
|
4092
PUT
STAAR Surgical
STAA
$1.13B
| $340K | ﹤0.01% |
10,900
-91,900
| -89% | -$3.3M |
|
4093
Toast
TOST
$18.8B
| $340K | ﹤0.01% |
+18,623
| New | +$305K |
|
4094
CALL
Icon
ICLR
$13.9B
| $339K | ﹤0.01% |
1,200
-800
| -40% | -$207K |
|
|
SPYM
4095
State Street SPDR Portfolio S&P 500 ETF
SPYM
$160B
| $339K | ﹤0.01% |
6,076
+36
| +0.6% | +$1.89K |
|
4096
ZipRecruiter
ZIP
$348M
| $339K | ﹤0.01% |
+24,419
| New | +$302K |
|
4097
B2Gold
BTG
$5.12B
| $338K | ﹤0.01% |
107,125
+41,735
| +64% | +$132K |
|
|
4098
Globus Medical
GMED
$10.9B
| $338K | ﹤0.01% |
+6,357
| New | +$310K |
|
|
NGD
4099
CALL
DELISTED
New Gold Inc
NGD
| $338K | ﹤0.01% |
231,600
-42,600
| -16% | -$53.6K |
|
|
GMS
4100
CALL
DELISTED
GMS Inc
GMS
| $337K | ﹤0.01% |
4,100
-5,900
| -59% | -$395K |
|
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.