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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5976
Chemed
CHE
$7.07B
| $45K | ﹤0.01% |
86
+62
| +258% | +$35K |
|
5977
Commercial Vehicle Group
CVGI
$154M
| $45K | ﹤0.01% |
+18,165
| New | +$48.5K |
|
|
DHC
5978
PUT
Diversified Healthcare Trust
DHC
$2.15B
| $45K | ﹤0.01% |
19,700
+13,700
| +228% | +$40.3K |
|
5979
CALL
Editas Medicine
EDIT
$396M
| $45K | ﹤0.01% |
35,700
+4,800
| +16% | +$12.2K |
|
5980
PUT
Vaalco Energy
EGY
$570M
| $45K | ﹤0.01% |
10,400
-8,500
| -45% | -$45.2K |
|
5981
CALL
Kiniksa Pharmaceuticals
KNSA
$5.8B
| $45K | ﹤0.01% |
2,300
+1,100
| +92% | +$25.1K |
|
5982
LiveWire
LVWR
$371M
| $45K | ﹤0.01% |
9,464
+5,760
| +156% | +$33.9K |
|
5983
CALL
MediaAlpha
MAX
$758M
| $45K | ﹤0.01% |
4,000
+3,900
| +3,900% | +$56.1K |
|
5984
PUT
Madison Square Garden
MSGS
$9.48B
| $45K | ﹤0.01% |
200
-700
| -78% | -$156K |
|
|
NOTE
5985
DELISTED
FiscalNote
NOTE
| $45K | ﹤0.01% |
+3,571
| New | +$43.5K |
|
5986
CALL
OGE Energy
OGE
$9.78B
| $45K | ﹤0.01% |
1,100
-11,500
| -91% | -$479K |
|
|
PPSI
5987
CALL
Pioneer Power Solutions
PPSI
$32.3M
| $45K | ﹤0.01% |
10,900
+10,500
| +2,625% | +$59.3K |
|
5988
PUT
Rekor Systems
REKR
$85.8M
| $45K | ﹤0.01% |
29,200
| – | – |
|
5989
CALL
Triumph Financial Inc
TFIN
$1.81B
| $45K | ﹤0.01% |
500
-7,400
| -94% | -$688K |
|
5990
PUT
Veeco
VECO
$3.05B
| $45K | ﹤0.01% |
1,700
-17,300
| -91% | -$502K |
|
|
VRNT
5991
DELISTED
Verint Systems
VRNT
| $45K | ﹤0.01% |
+1,672
| New | +$41.8K |
|
|
LB
5992
PUT
LandBridge Co
LB
$2.16B
| $45K | ﹤0.01% |
+700
| New | +$42K |
|
5993
CALL
Autohome
ATHM
$2.67B
| $44K | ﹤0.01% |
1,700
+300
| +21% | +$8.64K |
|
|
CIO
5994
DELISTED
City Office REIT
CIO
| $44K | ﹤0.01% |
7,994
-78,712
| -91% | -$432K |
|
5995
PUT
Claros Mortgage Trust
CMTG
$250M
| $44K | ﹤0.01% |
9,900
+8,600
| +662% | +$53.6K |
|
5996
CALL
Denali Therapeutics
DNLI
$3.65B
| $44K | ﹤0.01% |
2,200
-5,100
| -70% | -$131K |
|
5997
Descartes Systems
DSGX
$6.44B
| $44K | ﹤0.01% |
+392
| New | +$43.7K |
|
5998
EXL Service
EXLS
$5.14B
| $44K | ﹤0.01% |
+992
| New | +$42.9K |
|
5999
iShares US Healthcare Providers ETF
IHF
$1.21B
| $44K | ﹤0.01% |
+923
| New | +$48.7K |
|
6000
PUT
Immunocore
IMCR
$1.72B
| $44K | ﹤0.01% |
1,500
+300
| +25% | +$9.48K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.