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 | |
|---|---|---|---|---|---|---|
5551
PUT
ReNew
RNW
$2.27B
| $68K | ﹤0.01% |
10,100
-2,400
| -19% | -$14.6K |
|
5552
PUT
Taboola.com
TBLA
$1.37B
| $68K | ﹤0.01% |
18,900
-295,300
| -94% | -$1.05M |
|
5553
Tyler Technologies
TYL
$12.7B
| $68K | ﹤0.01% |
119
-631
| -84% | -$381K |
|
5554
Verastem
VSTM
$510M
| $68K | ﹤0.01% |
+13,334
| New | +$52.5K |
|
5555
Acadia Healthcare
ACHC
$2.76B
| $67K | ﹤0.01% |
1,697
-21,910
| -93% | -$988K |
|
5556
Amylyx Pharmaceuticals
AMLX
$2.26B
| $67K | ﹤0.01% |
17,819
-93,909
| -84% | -$442K |
|
5557
Franklin Resources
BEN
$17.6B
| $67K | ﹤0.01% |
+3,328
| New | +$70.1K |
|
5558
PUT
Imperial Petroleum
IMPP
$213M
| $67K | ﹤0.01% |
22,500
-555,700
| -96% | -$1.9M |
|
|
TBHC
5559
DELISTED
The Brand House Collective
TBHC
| $67K | ﹤0.01% |
41,616
+29,204
| +235% | +$52.8K |
|
|
ONT
5560
Onterris Inc
ONT
$759M
| $67K | ﹤0.01% |
+3,614
| New | +$76K |
|
5561
PUT
Mercury Systems
MRCY
$5.83B
| $67K | ﹤0.01% |
1,600
-300
| -16% | -$11.4K |
|
5562
PUT
Envista
NVST
$4.44B
| $67K | ﹤0.01% |
+3,500
| New | +$69.2K |
|
5563
PUT
PROG Holdings
PRG
$1.75B
| $67K | ﹤0.01% |
1,600
-200
| -11% | -$9.24K |
|
5564
CALL
Pyxis Oncology
PYXS
$168M
| $67K | ﹤0.01% |
43,500
+30,600
| +237% | +$88.3K |
|
5565
PUT
Snap-on
SNA
$21.2B
| $67K | ﹤0.01% |
200
-2,400
| -92% | -$810K |
|
|
SNBR
5566
CALL
DELISTED
Sleep Number
SNBR
| $67K | ﹤0.01% |
4,400
-5,200
| -54% | -$80.7K |
|
5567
Sasol
SSL
$7.5B
| $67K | ﹤0.01% |
14,791
+11,748
| +386% | +$66.4K |
|
5568
PUT
Universal Insurance Holdings
UVE
$1.22B
| $67K | ﹤0.01% |
+3,200
| New | +$67K |
|
5569
PUT
American Battery Technology Co
ABAT
$285M
| $66K | ﹤0.01% |
26,900
+1,800
| +7% | +$2.02K |
|
5570
Harmony Gold Mining
HMY
$9.84B
| $66K | ﹤0.01% |
8,130
-74,574
| -90% | -$724K |
|
5571
Immunome
IMNM
$2.58B
| $66K | ﹤0.01% |
6,280
+4,954
| +374% | +$59.9K |
|
5572
Kulicke & Soffa
KLIC
$4.67B
| $66K | ﹤0.01% |
1,417
+1,076
| +316% | +$50.5K |
|
5573
CALL
MacroGenics
MGNX
$235M
| $66K | ﹤0.01% |
20,400
-58,900
| -74% | -$212K |
|
5574
CALL
NGL Energy Partners
NGL
$2.05B
| $66K | ﹤0.01% |
13,300
-12,000
| -47% | -$53.7K |
|
5575
GraniteShares 2x Short NVDA Daily ETF
NVD
$59M
| $66K | ﹤0.01% |
2,220
+1,262
| +132% | +$40.7K |
|
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.