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 | |
|---|---|---|---|---|---|---|
3076
PUT
Structure Therapeutics
GPCR
$3.49B
| $794K | ﹤0.01% |
29,300
+7,400
| +34% | +$263K |
|
3077
CALL
Immatics
IMTX
$1.24B
| $794K | ﹤0.01% |
111,800
+54,500
| +95% | +$468K |
|
3078
CALL
Mama's Creations
MAMA
$825M
| $794K | ﹤0.01% |
99,800
+13,900
| +16% | +$115K |
|
3079
PUT
Metropolitan Bank Holding Corp
MCB
$1.13B
| $794K | ﹤0.01% |
13,600
-3,900
| -22% | -$234K |
|
3080
PUT
NETGEAR
NTGR
$669M
| $794K | ﹤0.01% |
28,500
-35,800
| -56% | -$842K |
|
3081
Dana Inc
DAN
$2.91B
| $793K | ﹤0.01% |
+68,654
| New | +$713K |
|
3082
CALL
Organon & Co
OGN
$3.55B
| $793K | ﹤0.01% |
53,200
+1,600
| +3% | +$26.1K |
|
3083
CALL
Alkermes
ALKS
$8.82B
| $790K | ﹤0.01% |
27,500
+27,300
| +13,650% | +$785K |
|
3084
CALL
Haleon
HLN
$43.1B
| $790K | ﹤0.01% |
82,900
+82,100
| +10,263% | +$803K |
|
3085
PUT
Payoneer
PAYO
$2.41B
| $790K | ﹤0.01% |
78,700
-1,400
| -2% | -$13.4K |
|
|
PLL
3086
CALL
DELISTED
Piedmont Lithium
PLL
| $790K | ﹤0.01% |
90,500
+78,500
| +654% | +$921K |
|
3087
PUT
Iridium Communications
IRDM
$4.85B
| $789K | ﹤0.01% |
27,200
+16,300
| +150% | +$485K |
|
3088
Blue Owl Capital
OBDC
$5.35B
| $788K | ﹤0.01% |
52,152
-6,998
| -12% | -$105K |
|
3089
CALL
Birkenstock
BIRK
$7.47B
| $787K | ﹤0.01% |
13,900
-20,800
| -60% | -$1.06M |
|
3090
CALL
Patterson-UTI
PTEN
$3.87B
| $786K | ﹤0.01% |
96,100
+20,600
| +27% | +$165K |
|
3091
Teekay
TK
$975M
| $785K | ﹤0.01% |
113,360
+18,510
| +20% | +$143K |
|
3092
PUT
Clear Secure
YOU
$5.26B
| $785K | ﹤0.01% |
29,500
-196,100
| -87% | -$5.92M |
|
3093
CALL
Banco Bradesco
BBD
$38.1B
| $784K | ﹤0.01% |
410,900
+271,100
| +194% | +$635K |
|
3094
CALL
USA Compression Partners
USAC
$3.82B
| $784K | ﹤0.01% |
33,300
+20,400
| +158% | +$466K |
|
3095
PUT
The RealReal
REAL
$1.34B
| $783K | ﹤0.01% |
71,700
+48,800
| +213% | +$259K |
|
3096
Sundial Growers
SNDL
$325M
| $782K | ﹤0.01% |
436,913
+52,092
| +14% | +$102K |
|
|
BRSL
3097
PUT
Brightstar Lottery PLC
BRSL
$1.91B
| $780K | ﹤0.01% |
44,200
-88,000
| -67% | -$1.73M |
|
3098
Papa John's
PZZA
$999M
| $780K | ﹤0.01% |
+19,008
| New | +$934K |
|
3099
PUT
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $780K | ﹤0.01% |
12,000
-64,200
| -84% | -$3.75M |
|
3100
American Water Works
AWK
$26.3B
| $779K | ﹤0.01% |
+6,259
| New | +$845K |
|
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.