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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5426
CALL
El Pollo Loco
LOCO
$501M
| $117K | ﹤0.01% |
12,100
+11,600
| +2,320% | +$104K |
|
|
MTA
5427
PUT
Metalla Royalty & Streaming
MTA
$688M
| $117K | ﹤0.01% |
37,700
+12,900
| +52% | +$36.7K |
|
5428
PDF Solutions
PDFS
$1.93B
| $117K | ﹤0.01% |
+3,487
| New | +$114K |
|
|
VNET
5429
VNET Group
VNET
$2.04B
| $117K | ﹤0.01% |
+75,844
| New | +$140K |
|
5430
CALL
Build-A-Bear
BBW
$425M
| $116K | ﹤0.01% |
3,900
-33,100
| -89% | -$794K |
|
5431
PUT
Cibus
CBUS
$147M
| $116K | ﹤0.01% |
+5,200
| New | +$95.6K |
|
5432
CALL
Collegium Pharmaceutical
COLL
$1.15B
| $116K | ﹤0.01% |
+3,000
| New | +$105K |
|
5433
iShares Select U.S. REIT ETF
ICF
$2.09B
| $116K | ﹤0.01% |
+2,015
| New | +$115K |
|
5434
PUT
LifeMD
LFMD
$169M
| $116K | ﹤0.01% |
11,300
+5,000
| +79% | +$37K |
|
5435
CALL
Malibu Boats
MBUU
$541M
| $116K | ﹤0.01% |
2,700
+1,900
| +238% | +$87.1K |
|
5436
MasterCraft Boat Holdings
MCFT
$579M
| $116K | ﹤0.01% |
4,909
+3,842
| +360% | +$82.6K |
|
5437
CALL
Outdoor Holding Co
POWW
$249M
| $116K | ﹤0.01% |
42,300
-4,800
| -10% | -$11.2K |
|
|
AHRT
5438
PUT
AH Realty Trust
AHRT
$529M
| $115K | ﹤0.01% |
11,100
+6,000
| +118% | +$68.1K |
|
5439
CALL
Bitdeer Technologies
BTDR
$2.56B
| $115K | ﹤0.01% |
+16,500
| New | +$121K |
|
5440
Flux Power
FLUX
$11.2M
| $115K | ﹤0.01% |
25,990
+10,767
| +71% | +$50K |
|
5441
CALL
Richardson Electronics
RELL
$267M
| $115K | ﹤0.01% |
12,500
+6,700
| +116% | +$64.5K |
|
|
ACCD
5442
CALL
DELISTED
Accolade Inc
ACCD
| $115K | ﹤0.01% |
11,000
+5,100
| +86% | +$58K |
|
5443
PUT
Actinium Pharmaceuticals
ATNM
$26.3M
| $114K | ﹤0.01% |
14,600
+13,600
| +1,360% | +$87.4K |
|
5444
GraniteShares ETF Trust GraniteShares 2x Long META Daily ETF
FBL
$154M
| $114K | ﹤0.01% |
4,370
+4,245
| +3,396% | +$98.3K |
|
5445
PUT
Granite Construction
GVA
$5.29B
| $114K | ﹤0.01% |
2,000
-2,800
| -58% | -$140K |
|
5446
Inogen
INGN
$175M
| $114K | ﹤0.01% |
14,154
-17,016
| -55% | -$120K |
|
5447
PUT
Protolabs
PRLB
$1.79B
| $114K | ﹤0.01% |
3,200
| – | – |
|
5448
SLR Investment Corp
SLRC
$686M
| $114K | ﹤0.01% |
+7,477
| New | +$113K |
|
|
IBTX
5449
PUT
DELISTED
Independent Bank Group, Inc.
IBTX
| $114K | ﹤0.01% |
+2,500
| New | +$117K |
|
5450
CALL
AudioEye
AEYE
$72.3M
| $113K | ﹤0.01% |
11,300
+8,300
| +277% | +$54.4K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.