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 | |
|---|---|---|---|---|---|---|
|
SUPV
3201
CALL
Grupo Supervielle
SUPV
$855M
| $705K | ﹤0.01% |
46,700
-22,200
| -32% | -$237K |
|
3202
PUT
ING
ING
$95.1B
| $702K | ﹤0.01% |
44,800
+2,500
| +6% | +$40.6K |
|
3203
CALL
Qualys
QLYS
$4.83B
| $701K | ﹤0.01% |
5,000
+4,900
| +4,900% | +$682K |
|
3204
CALL
Companhia Siderúrgica Nacional
SID
$1.47B
| $699K | ﹤0.01% |
486,100
-266,200
| -35% | -$521K |
|
|
LOGC
3205
DELISTED
ContextLogic
LOGC
| $699K | ﹤0.01% |
99,502
+39,126
| +65% | +$260K |
|
3206
YieldMax NVDA Option Income Strategy ETF
NVDY
$1.33B
| $698K | ﹤0.01% |
29,897
+23,421
| +362% | +$584K |
|
3207
Molson Coors Class B
TAP
$7.7B
| $698K | ﹤0.01% |
+12,179
| New | +$710K |
|
3208
BlackBerry
BB
$4.91B
| $696K | ﹤0.01% |
184,390
+79,299
| +75% | +$211K |
|
|
VRN
3209
DELISTED
Veren
VRN
| $694K | ﹤0.01% |
+135,118
| New | +$742K |
|
3210
PUT
Clearwater Paper
CLW
$281M
| $693K | ﹤0.01% |
23,300
+23,100
| +11,550% | +$627K |
|
|
EXK
3211
CALL
Endeavour Silver
EXK
$2.33B
| $693K | ﹤0.01% |
189,600
+121,500
| +178% | +$537K |
|
|
KC
3212
CALL
Kingsoft Cloud Holdings
KC
$2.97B
| $693K | ﹤0.01% |
66,100
+10,200
| +18% | +$58.1K |
|
3213
Wolverine World Wide
WWW
$1.57B
| $693K | ﹤0.01% |
31,243
-135,774
| -81% | -$2.73M |
|
3214
PUT
Coursera
COUR
$1.62B
| $692K | ﹤0.01% |
81,500
+33,000
| +68% | +$255K |
|
|
IRBT
3215
PUT
DELISTED
iRobot
IRBT
| $692K | ﹤0.01% |
89,300
+21,100
| +31% | +$169K |
|
3216
CALL
Main Street Capital
MAIN
$5.02B
| $691K | ﹤0.01% |
11,800
-600
| -5% | -$32K |
|
3217
ProShares Ultra S&P500
SSO
$7.67B
| $691K | ﹤0.01% |
14,956
+832
| +6% | +$39.2K |
|
3218
CALL
Dyne Therapeutics
DYN
$4.17B
| $690K | ﹤0.01% |
29,300
-25,200
| -46% | -$745K |
|
3219
Immatics
IMTX
$1.26B
| $690K | ﹤0.01% |
+97,085
| New | +$834K |
|
3220
CALL
Markel Group
MKL
$25.2B
| $690K | ﹤0.01% |
400
+300
| +300% | +$498K |
|
3221
CALL
Sterling Infrastructure
STRL
$19B
| $690K | ﹤0.01% |
4,100
+700
| +21% | +$121K |
|
|
B
3222
CALL
DELISTED
Barnes Group Inc.
B
| $689K | ﹤0.01% |
+14,600
| New | +$678K |
|
3223
CALL
Marqeta
MQ
$1.86B
| $688K | ﹤0.01% |
45,425
-14,350
| -24% | -$252K |
|
3224
Star Bulk Carriers
SBLK
$3.01B
| $688K | ﹤0.01% |
+46,066
| New | +$856K |
|
3225
Scotiabank
BNS
$106B
| $686K | ﹤0.01% |
+12,779
| New | +$690K |
|
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.