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 | |
|---|---|---|---|---|---|---|
|
ALEX
5151
PUT
DELISTED
Alexander & Baldwin
ALEX
| $102K | ﹤0.01% |
5,800
+4,900
| +544% | +$92.4K |
|
|
AGNT
5152
PUT
AGNT Inc
AGNT
$644M
| $102K | ﹤0.01% |
8,900
-25,300
| -74% | -$333K |
|
|
DMC
5153
PUT
Del Monte Corp
DMC
$1.41B
| $102K | ﹤0.01% |
3,100
-3,300
| -52% | -$106K |
|
5154
PUT
Pacific Biosciences
PACB
$441M
| $102K | ﹤0.01% |
55,800
-4,100
| -7% | -$8K |
|
5155
PUT
PRA Group
PRAA
$654M
| $102K | ﹤0.01% |
4,900
-4,400
| -47% | -$93.9K |
|
5156
Real Brokerage
REAX
$351M
| $102K | ﹤0.01% |
22,354
-19,978
| -47% | -$105K |
|
5157
ProShares Short 20+ Year Treasury ETF
TBF
$88M
| $102K | ﹤0.01% |
+4,160
| New | +$98.1K |
|
5158
Trevi Therapeutics
TRVI
$2.58B
| $102K | ﹤0.01% |
24,913
+15,272
| +158% | +$48.9K |
|
5159
Loar Holdings
LOAR
$6.4B
| $102K | ﹤0.01% |
+1,389
| New | +$114K |
|
5160
Pacer US Small Cap Cash Cows 100 ETF
CALF
$3.65B
| $101K | ﹤0.01% |
2,297
-3,181
| -58% | -$147K |
|
5161
PUT
DoubleVerify
DV
$1.69B
| $101K | ﹤0.01% |
5,300
-56,100
| -91% | -$1.06M |
|
5162
GrowGeneration
GRWG
$86.5M
| $101K | ﹤0.01% |
59,791
-8,681
| -13% | -$16.6K |
|
5163
PUT
Monro
MNRO
$386M
| $101K | ﹤0.01% |
4,100
-6,400
| -61% | -$175K |
|
5164
CALL
Rackspace Technology
RXT
$1.06B
| $101K | ﹤0.01% |
46,100
+34,000
| +281% | +$85.8K |
|
|
QVCGA
5165
DELISTED
QVC Group Inc Series A
QVCGA
| $101K | ﹤0.01% |
6,148
+6,029
| +5,066% | +$141K |
|
|
CTO
5166
PUT
CTO Realty Growth
CTO
$811M
| $100K | ﹤0.01% |
5,100
+1,700
| +50% | +$33.4K |
|
|
FOLD
5167
DELISTED
Amicus Therapeutics
FOLD
| $100K | ﹤0.01% |
10,657
-9,593
| -47% | -$99.7K |
|
5168
Meritage Homes
MTH
$4.6B
| $100K | ﹤0.01% |
1,310
-2,596
| -66% | -$237K |
|
5169
PUT
Murphy USA
MUSA
$11.3B
| $100K | ﹤0.01% |
200
-100
| -33% | -$51.1K |
|
5170
CALL
OSI Systems
OSIS
$3.65B
| $100K | ﹤0.01% |
600
-3,100
| -84% | -$491K |
|
|
PMT
5171
CALL
PennyMac Mortgage Investment
PMT
$810M
| $100K | ﹤0.01% |
8,000
-33,700
| -81% | -$456K |
|
5172
Sprout Social
SPT
$505M
| $100K | ﹤0.01% |
3,258
-12,492
| -79% | -$375K |
|
5173
CALL
Wheels Up
UP
$211M
| $100K | ﹤0.01% |
3,050
-1,305
| -30% | -$54.9K |
|
|
BTCL
5174
PUT
T-Rex 2X Long Bitcoin Daily Target ETF
BTCL
$21.5M
| $100K | ﹤0.01% |
+5,500
| New | +$239K |
|
|
ROIC
5175
CALL
DELISTED
Retail Opportunity Investments Corp.
ROIC
| $100K | ﹤0.01% |
+5,800
| New | +$97K |
|
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.