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 | |
|---|---|---|---|---|---|---|
|
SCPH
5001
CALL
DELISTED
scPharmaceuticals
SCPH
| $121K | ﹤0.01% |
34,200
+5,100
| +18% | +$19.5K |
|
|
TWO
5002
Two Harbors Investment
TWO
$1.27B
| $121K | ﹤0.01% |
10,231
+58
| +0.6% | +$702 |
|
5003
ACI Worldwide
ACIW
$5.86B
| $120K | ﹤0.01% |
2,312
+2,106
| +1,022% | +$112K |
|
5004
PUT
Allegro MicroSystems
ALGM
$7.72B
| $120K | ﹤0.01% |
5,500
-259,100
| -98% | -$5.52M |
|
5005
CALL
Artisan Partners
APAM
$2.82B
| $120K | ﹤0.01% |
2,800
+1,000
| +56% | +$45.7K |
|
5006
CALL
AtaiBeckley Inc
ATAI
$2.66B
| $120K | ﹤0.01% |
90,900
+65,900
| +264% | +$87.6K |
|
5007
CALL
Extreme Networks
EXTR
$3.9B
| $120K | ﹤0.01% |
7,200
-4,000
| -36% | -$64.7K |
|
5008
PUT
Immunome
IMNM
$2.61B
| $120K | ﹤0.01% |
11,300
+8,400
| +290% | +$102K |
|
|
JAMF
5009
PUT
DELISTED
Jamf
JAMF
| $120K | ﹤0.01% |
8,600
+7,000
| +438% | +$110K |
|
5010
PUT
TC Energy
TRP
$70.9B
| $120K | ﹤0.01% |
14,300
-79,800
| -85% | -$3.77M |
|
|
VNET
5011
CALL
VNET Group
VNET
$2.08B
| $120K | ﹤0.01% |
+25,500
| New | +$96.9K |
|
|
SMCY
5012
YieldMax SMCI Option Income Strategy ETF
SMCY
$102M
| $120K | ﹤0.01% |
+4,688
| New | +$176K |
|
|
AMWD
5013
CALL
DELISTED
American Woodmark
AMWD
| $119K | ﹤0.01% |
1,500
-400
| -21% | -$36.6K |
|
5014
CALL
United States Brent Oil Fund
BNO
$770M
| $119K | ﹤0.01% |
4,000
-72,700
| -95% | -$2.14M |
|
5015
PUT
CAE Inc. Common Shares
CAE
$8.31B
| $119K | ﹤0.01% |
+4,700
| New | +$99.1K |
|
|
CGAU
5016
Centerra Gold
CGAU
$3.58B
| $119K | ﹤0.01% |
+20,983
| New | +$135K |
|
5017
PUT
Coty
COTY
$2.37B
| $119K | ﹤0.01% |
17,100
-2,300
| -12% | -$17.7K |
|
5018
PUT
Indivior Pharmaceuticals
INDV
$4.75B
| $119K | ﹤0.01% |
9,600
+8,900
| +1,271% | +$91.6K |
|
|
INFA
5019
PUT
DELISTED
Informatica
INFA
| $119K | ﹤0.01% |
4,600
+700
| +18% | +$18.3K |
|
5020
PUT
Kaiser Aluminum
KALU
$2.61B
| $119K | ﹤0.01% |
1,700
| – | – |
|
5021
iShares S&P 100 ETF
OEF
$19.9B
| $119K | ﹤0.01% |
+414
| New | +$118K |
|
5022
CALL
RBC Bearings
RBC
$17.8B
| $119K | ﹤0.01% |
400
-1,200
| -75% | -$369K |
|
5023
Sally Beauty Holdings
SBH
$1.46B
| $119K | ﹤0.01% |
11,428
+2,696
| +31% | +$34.5K |
|
|
WW
5024
PUT
DELISTED
WW International
WW
| $119K | ﹤0.01% |
94,700
+73,000
| +336% | +$87.6K |
|
|
XNET
5025
Xunlei
XNET
$360M
| $119K | ﹤0.01% |
60,082
+55,620
| +1,247% | +$113K |
|
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.