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 | |
|---|---|---|---|---|---|---|
|
AMWD
6876
PUT
DELISTED
American Woodmark
AMWD
| $15K | ﹤0.01% |
+200
| New | +$18.3K |
|
6877
PUT
Aquestive Therapeutics
AQST
$452M
| $15K | ﹤0.01% |
4,300
-9,200
| -68% | -$42.4K |
|
6878
CALL
AptarGroup
ATR
$8.69B
| $15K | ﹤0.01% |
+100
| New | +$16.7K |
|
6879
PUT
Barings BDC
BBDC
$869M
| $15K | ﹤0.01% |
1,600
-700
| -30% | -$6.84K |
|
6880
CALL
CuriosityStream
CURI
$148M
| $15K | ﹤0.01% |
10,400
-500
| -5% | -$964 |
|
|
DOO
6881
CALL
Bombardier Recreational Products
DOO
$4.48B
| $15K | ﹤0.01% |
+300
| New | +$15.6K |
|
6882
CALL
8x8 Inc
EGHT
$279M
| $15K | ﹤0.01% |
5,800
+1,100
| +23% | +$2.82K |
|
|
FOLD
6883
PUT
DELISTED
Amicus Therapeutics
FOLD
| $15K | ﹤0.01% |
+1,600
| New | +$16.6K |
|
6884
PUT
Gevo
GEVO
$353M
| $15K | ﹤0.01% |
7,200
+5,400
| +300% | +$10.2K |
|
6885
PUT
Gaotu Techedu
GOTU
$405M
| $15K | ﹤0.01% |
6,900
-135,900
| -95% | -$396K |
|
|
HI
6886
PUT
DELISTED
Hillenbrand
HI
| $15K | ﹤0.01% |
500
| – | – |
|
6887
CALL
HNI Corp
HNI
$3.08B
| $15K | ﹤0.01% |
300
-4,000
| -93% | -$215K |
|
6888
PUT
Hyliion Holdings
HYLN
$578M
| $15K | ﹤0.01% |
5,800
+4,600
| +383% | +$12.8K |
|
6889
iShares Morningstar Growth ETF
ILCG
$3B
| $15K | ﹤0.01% |
+171
| New | +$15.1K |
|
6890
Leggett & Platt
LEG
$1.4B
| $15K | ﹤0.01% |
1,591
-21,335
| -93% | -$255K |
|
6891
PUT
LSB Industries
LXU
$824M
| $15K | ﹤0.01% |
2,000
+1,000
| +100% | +$8.59K |
|
6892
CALL
MasterCraft Boat Holdings
MCFT
$596M
| $15K | ﹤0.01% |
800
+300
| +60% | +$5.74K |
|
6893
CALL
Meritage Homes
MTH
$4.78B
| $15K | ﹤0.01% |
200
-400
| -67% | -$36.5K |
|
6894
CALL
Nektar Therapeutics
NKTR
$2.39B
| $15K | ﹤0.01% |
1,087
-2,180
| -67% | -$38.4K |
|
6895
CALL
Navigator Holdings
NVGS
$1.35B
| $15K | ﹤0.01% |
+1,000
| New | +$15.7K |
|
6896
CALL
Fidelity Nasdaq Composite Index ETF
ONEQ
$9.97B
| $15K | ﹤0.01% |
+200
| New | +$15K |
|
6897
CALL
Oxford Industries
OXM
$581M
| $15K | ﹤0.01% |
200
-100
| -33% | -$7.84K |
|
6898
PUT
PJT Partners
PJT
$4.26B
| $15K | ﹤0.01% |
+100
| New | +$15.3K |
|
6899
PUT
Ryder
R
$9.9B
| $15K | ﹤0.01% |
100
-4,000
| -98% | -$625K |
|
6900
PUT
Solid Power
SLDP
$450M
| $15K | ﹤0.01% |
8,100
+3,400
| +72% | +$4.21K |
|
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.