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 | |
|---|---|---|---|---|---|---|
3176
PUT
NOV
NOV
$7.5B
| $721K | ﹤0.01% |
49,400
+22,100
| +81% | +$345K |
|
3177
CALL
Vanguard Total Bond Market
BND
$158B
| $720K | ﹤0.01% |
9,800
+5,700
| +139% | +$417K |
|
3178
PUT
Coeur Mining
CDE
$15.7B
| $720K | ﹤0.01% |
125,900
-31,800
| -20% | -$206K |
|
|
SOHU
3179
CALL
Sohu.com
SOHU
$345M
| $720K | ﹤0.01% |
54,700
-47,100
| -46% | -$656K |
|
3180
Vivid Seats
SEAT
$81.9M
| $719K | ﹤0.01% |
7,773
-1,453
| -16% | -$108K |
|
3181
Amkor Technology
AMKR
$14.8B
| $718K | ﹤0.01% |
+27,966
| New | +$769K |
|
3182
CALL
Bausch + Lomb
BLCO
$5.83B
| $718K | ﹤0.01% |
39,800
+17,200
| +76% | +$336K |
|
3183
CALL
Idaho Strategic Resources
IDR
$448M
| $718K | ﹤0.01% |
70,500
+42,500
| +152% | +$572K |
|
3184
Camtek
CAMT
$6.84B
| $717K | ﹤0.01% |
8,888
+6,486
| +270% | +$510K |
|
|
KOCG
3185
CALL
DELISTED
FIS Knights of Columbus Global Belief ETF
KOCG
| $717K | ﹤0.01% |
14,200
-400
| -3% | -$11.4K |
|
3186
Kanzhun
BZ
$6.99B
| $716K | ﹤0.01% |
51,946
-36,264
| -41% | -$534K |
|
3187
3M
MMM
$91.2B
| $715K | ﹤0.01% |
5,545
-82,293
| -94% | -$10.8M |
|
3188
Fluor
FLR
$7.15B
| $712K | ﹤0.01% |
+14,439
| New | +$761K |
|
3189
Timken Company
TKR
$9.63B
| $711K | ﹤0.01% |
9,974
-5,405
| -35% | -$425K |
|
3190
CALL
Travel + Leisure Co
TNL
$4.62B
| $711K | ﹤0.01% |
14,100
+11,500
| +442% | +$583K |
|
3191
Logitech
LOGI
$15.3B
| $710K | ﹤0.01% |
8,632
+5,734
| +198% | +$475K |
|
3192
PUT
Travere Therapeutics
TVTX
$5.3B
| $710K | ﹤0.01% |
40,800
-6,900
| -14% | -$122K |
|
3193
PUT
Watsco Inc
WSO
$15B
| $710K | ﹤0.01% |
1,500
-1,800
| -55% | -$912K |
|
3194
PUT
Quest Diagnostics
DGX
$25.4B
| $709K | ﹤0.01% |
4,700
-3,600
| -43% | -$560K |
|
3195
CALL
Sigma Lithium
SGML
$1.1B
| $709K | ﹤0.01% |
63,200
-48,900
| -44% | -$640K |
|
3196
PUT
Core & Main
CNM
$8.05B
| $707K | ﹤0.01% |
13,900
-15,600
| -53% | -$735K |
|
3197
Zillow
Z
$7.43B
| $707K | ﹤0.01% |
9,550
-52,127
| -85% | -$3.73M |
|
|
GOGL
3198
DELISTED
Golden Ocean Group
GOGL
| $706K | ﹤0.01% |
+78,800
| New | +$849K |
|
3199
Dentsply Sirona
XRAY
$2.64B
| $706K | ﹤0.01% |
+37,235
| New | +$787K |
|
3200
PUT
HighPeak Energy
HPK
$903M
| $705K | ﹤0.01% |
48,000
-10,100
| -17% | -$145K |
|
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.