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 | |
|---|---|---|---|---|---|---|
2576
PUT
Blue Owl Capital
OBDC
$5.35B
| $1.32M | ﹤0.01% |
87,500
-11,800
| -12% | -$178K |
|
2577
CALL
Snap-on
SNA
$20.9B
| $1.32M | ﹤0.01% |
3,900
+2,500
| +179% | +$844K |
|
2578
PUT
FIVE9
FIVN
$1.77B
| $1.32M | ﹤0.01% |
32,500
+200
| +0.6% | +$7.21K |
|
2579
PUT
Oscar Health
OSCR
$8.5B
| $1.32M | ﹤0.01% |
98,100
-44,100
| -31% | -$710K |
|
2580
PUT
Liquidia Corp
LQDA
$7.67B
| $1.32M | ﹤0.01% |
112,000
-6,000
| -5% | -$65.6K |
|
|
CIVI
2581
CALL
DELISTED
Civitas Resources
CIVI
| $1.32M | ﹤0.01% |
28,700
-10,100
| -26% | -$503K |
|
2582
CALL
Zevra Therapeutics
ZVRA
$563M
| $1.31M | ﹤0.01% |
157,600
+64,200
| +69% | +$548K |
|
|
SNV
2583
DELISTED
Synovus
SNV
| $1.31M | ﹤0.01% |
25,543
-31,383
| -55% | -$1.63M |
|
2584
Altimmune
ALT
$539M
| $1.31M | ﹤0.01% |
181,172
+48,007
| +36% | +$367K |
|
2585
ProShares UltraShort QQQ
QID
$268M
| $1.3M | ﹤0.01% |
39,936
+25,636
| +179% | +$869K |
|
|
QXO
2586
QXO Inc
QXO
$14.2B
| $1.3M | ﹤0.01% |
81,710
+56,617
| +226% | +$891K |
|
2587
PUT
BlackSky Technology
BKSY
$800M
| $1.3M | ﹤0.01% |
120,300
+72,600
| +152% | +$622K |
|
2588
Phillips 66
PSX
$82.9B
| $1.3M | ﹤0.01% |
+11,399
| New | +$1.45M |
|
2589
Ferrari
RACE
$63.3B
| $1.3M | ﹤0.01% |
+3,057
| New | +$1.38M |
|
2590
CALL
MINISO
MNSO
$3.64B
| $1.3M | ﹤0.01% |
54,300
-38,100
| -41% | -$769K |
|
2591
Praxis Precision Medicines
PRAX
$9.07B
| $1.3M | ﹤0.01% |
16,854
+4,436
| +36% | +$321K |
|
|
GTM
2592
ZoomInfo Technologies
GTM
$861M
| $1.3M | ﹤0.01% |
123,498
-50,383
| -29% | -$539K |
|
2593
PUT
Tencent Music
TME
$14.5B
| $1.3M | ﹤0.01% |
114,200
-63,600
| -36% | -$755K |
|
2594
LegalZoom.com
LZ
$1.23B
| $1.29M | ﹤0.01% |
172,444
-466
| -0.3% | -$3.51K |
|
2595
PUT
Westlake Corp
WLK
$9.46B
| $1.29M | ﹤0.01% |
11,300
+9,400
| +495% | +$1.22M |
|
2596
Viking Therapeutics
VKTX
$4.04B
| $1.29M | ﹤0.01% |
32,141
-28,840
| -47% | -$1.64M |
|
2597
Insmed
INSM
$23.2B
| $1.29M | ﹤0.01% |
18,715
-40,846
| -69% | -$2.94M |
|
2598
Moody's
MCO
$81.7B
| $1.29M | ﹤0.01% |
2,729
+608
| +29% | +$290K |
|
2599
PUT
Northern Trust
NTRS
$22.2B
| $1.29M | ﹤0.01% |
12,600
-16,500
| -57% | -$1.69M |
|
2600
CALL
Universal Health Services
UHS
$9.43B
| $1.29M | ﹤0.01% |
7,200
-8,100
| -53% | -$1.65M |
|
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.