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 | |
|---|---|---|---|---|---|---|
4326
CALL
Trinity Capital Inc.
TRIN
$1.59B
| $240K | ﹤0.01% |
16,600
-27,100
| -62% | -$382K |
|
4327
CALL
Agree Realty
ADC
$9.78B
| $239K | ﹤0.01% |
3,400
-7,700
| -69% | -$573K |
|
4328
PUT
Antero Midstream
AM
$10.3B
| $239K | ﹤0.01% |
15,900
+4,600
| +41% | +$70K |
|
4329
CALL
B&G Foods
BGS
$307M
| $239K | ﹤0.01% |
34,800
-1,500
| -4% | -$11.3K |
|
4330
Danaos Corp
DAC
$2.52B
| $239K | ﹤0.01% |
+2,994
| New | +$247K |
|
4331
CALL
FerroAtlántica
GSM
$589M
| $239K | ﹤0.01% |
63,100
+41,900
| +198% | +$180K |
|
4332
CALL
HealthEquity
HQY
$8.67B
| $239K | ﹤0.01% |
2,500
+900
| +56% | +$83.9K |
|
4333
Lightwave Logic
LWLG
$840M
| $239K | ﹤0.01% |
113,913
+63,753
| +127% | +$183K |
|
4334
Ouster
OUST
$2.11B
| $239K | ﹤0.01% |
19,595
-38,558
| -66% | -$339K |
|
4335
Phunware
PHUN
$43.3M
| $239K | ﹤0.01% |
+46,151
| New | +$255K |
|
4336
PUT
Annovis Bio
ANVS
$72.3M
| $238K | ﹤0.01% |
47,500
-23,700
| -33% | -$172K |
|
4337
Casey's General Stores
CASY
$32.6B
| $238K | ﹤0.01% |
602
-206
| -25% | -$83K |
|
4338
FuboTV Inc
FUBO
$259M
| $237K | ﹤0.01% |
+15,720
| New | +$288K |
|
4339
PUT
Global Net Lease
GNL
$1.87B
| $237K | ﹤0.01% |
32,500
-2,300
| -7% | -$17.7K |
|
|
TERN
4340
CALL
DELISTED
Terns Pharmaceuticals
TERN
| $237K | ﹤0.01% |
42,800
-128,500
| -75% | -$870K |
|
4341
GraniteShares ETF Trust GraniteShares 2x Long NVDA Daily ETF
NVDL
$3.05B
| $236K | ﹤0.01% |
10,671
+1,395
| +15% | +$33.7K |
|
|
PLYA
4342
DELISTED
Playa Hotels & Resorts
PLYA
| $236K | ﹤0.01% |
18,681
+8,464
| +83% | +$80.1K |
|
4343
SES AI
SES
$189M
| $236K | ﹤0.01% |
108,099
+106,574
| +6,988% | +$60.8K |
|
4344
CALL
Sunoco
SUN
$14.7B
| $236K | ﹤0.01% |
4,600
-26,600
| -85% | -$1.41M |
|
4345
TMC The Metals Company
TMC
$1.49B
| $236K | ﹤0.01% |
211,013
+117,961
| +127% | +$111K |
|
4346
Varonis Systems
VRNS
$4.72B
| $236K | ﹤0.01% |
+5,320
| New | +$277K |
|
4347
CALL
Select Water Solutions
WTTR
$2.22B
| $236K | ﹤0.01% |
17,900
+14,600
| +442% | +$186K |
|
4348
Axalta
AXTA
$7.55B
| $235K | ﹤0.01% |
6,890
-2,558
| -27% | -$96.3K |
|
4349
CALL
Digimarc Corp
DMRC
$143M
| $235K | ﹤0.01% |
6,300
+2,200
| +54% | +$71.9K |
|
|
UDMY
4350
CALL
DELISTED
Udemy
UDMY
| $235K | ﹤0.01% |
28,600
+23,000
| +411% | +$185K |
|
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.