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 | |
|---|---|---|---|---|---|---|
6701
PUT
Associated Banc-Corp
ASB
$5.8B
| $19K | ﹤0.01% |
+800
| New | +$19.6K |
|
6702
Avantis International Equity ETF
AVDE
$18.2B
| $19K | ﹤0.01% |
+324
| New | +$20.7K |
|
|
BRT
6703
PUT
BRT Apartments
BRT
$284M
| $19K | ﹤0.01% |
1,100
+100
| +10% | +$1.81K |
|
6704
PUT
Crescent Capital BDC
CCAP
$400M
| $19K | ﹤0.01% |
1,000
+100
| +11% | +$1.89K |
|
6705
PUT
Carlyle Secured Lending
CGBD
$702M
| $19K | ﹤0.01% |
1,100
-200
| -15% | -$3.45K |
|
|
CHX
6706
CALL
DELISTED
ChampionX
CHX
| $19K | ﹤0.01% |
700
-3,400
| -83% | -$101K |
|
|
CLPR
6707
Clipper Realty
CLPR
$45.2M
| $19K | ﹤0.01% |
4,149
+3,771
| +998% | +$21.2K |
|
6708
CALL
DT Midstream
DTM
$14B
| $19K | ﹤0.01% |
200
-1,600
| -89% | -$152K |
|
|
6709
DT Midstream
DTM
$14B
| $19K | ﹤0.01% |
+197
| New | +$18.8K |
|
6710
iShares MSCI EAFE Growth ETF
EFG
$16.7B
| $19K | ﹤0.01% |
+200
| New | +$20.3K |
|
|
EU
6711
PUT
enCore Energy
EU
$219M
| $19K | ﹤0.01% |
5,700
+900
| +19% | +$3.39K |
|
6712
CALL
Farmers National Banc Corp
FMNB
$941M
| $19K | ﹤0.01% |
1,400
-4,800
| -77% | -$71.5K |
|
6713
PUT
Greystone Housing Impact Investors LP
GHI
$129M
| $19K | ﹤0.01% |
1,900
+1,300
| +217% | +$15.6K |
|
6714
PUT
Gladstone Capital
GLAD
$426M
| $19K | ﹤0.01% |
700
-900
| -56% | -$23.3K |
|
6715
PUT
GeoPark
GPRK
$622M
| $19K | ﹤0.01% |
2,100
-9,400
| -82% | -$83.6K |
|
6716
PUT
Hamilton Insurance Group
HG
$3.54B
| $19K | ﹤0.01% |
1,000
-100
| -9% | -$1.85K |
|
6717
PUT
Hilton Grand Vacations
HGV
$3.64B
| $19K | ﹤0.01% |
500
-6,800
| -93% | -$268K |
|
6718
CALL
Hillman Solutions
HLMN
$1.55B
| $19K | ﹤0.01% |
2,000
+1,700
| +567% | +$18.2K |
|
6719
PUT
James River Group Holdings
JRVR
$207M
| $19K | ﹤0.01% |
4,000
-3,900
| -49% | -$21.5K |
|
6720
CALL
KNOT Offshore Partners
KNOP
$358M
| $19K | ﹤0.01% |
3,500
-2,400
| -41% | -$14.5K |
|
6721
PUT
Liberty Global Class C
LBTYK
$3.49B
| $19K | ﹤0.01% |
1,500
-62,700
| -98% | -$1.08M |
|
6722
LanzaTech
LNZA
$59.4M
| $19K | ﹤0.01% |
+145
| New | +$21.8K |
|
6723
MediaAlpha
MAX
$732M
| $19K | ﹤0.01% |
1,737
-40,023
| -96% | -$576K |
|
6724
Marcus Corp
MCS
$912M
| $19K | ﹤0.01% |
925
-1,630
| -64% | -$32.3K |
|
|
MGIC
6725
DELISTED
Magic Software Enterprises
MGIC
| $19K | ﹤0.01% |
1,594
+1,418
| +806% | +$16.4K |
|
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.