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 | |
|---|---|---|---|---|---|---|
|
VBTX
5801
CALL
DELISTED
Veritex Holdings
VBTX
| $81K | ﹤0.01% |
+4,000
| New | +$82.7K |
|
|
NAGE
5802
PUT
Niagen Bioscience
NAGE
$271M
| $81K | ﹤0.01% |
+23,500
| New | +$43.5K |
|
5803
Birkenstock
BIRK
$7.12B
| $80K | ﹤0.01% |
+1,699
| New | +$81.1K |
|
5804
PUT
Corporacion America
CAAP
$4.21B
| $80K | ﹤0.01% |
4,800
+1,600
| +50% | +$24.8K |
|
5805
CALL
CION Investment
CION
$297M
| $80K | ﹤0.01% |
7,300
+6,100
| +508% | +$67.2K |
|
5806
CALL
VanEck Energy Income ETF
EINC
$78.2M
| $80K | ﹤0.01% |
6,100
-5,500
| -47% | -$387K |
|
5807
Genesis Energy
GEL
$1.87B
| $80K | ﹤0.01% |
+7,227
| New | +$82.6K |
|
5808
PUT
Hexcel
HXL
$7.79B
| $80K | ﹤0.01% |
1,100
+100
| +10% | +$7.19K |
|
5809
CALL
inTEST
INTT
$155M
| $80K | ﹤0.01% |
6,100
+400
| +7% | +$4.73K |
|
5810
Magnachip Semiconductor
MX
$119M
| $80K | ﹤0.01% |
14,514
-3,644
| -20% | -$23.3K |
|
5811
CALL
Pyxis Oncology
PYXS
$168M
| $80K | ﹤0.01% |
18,800
+18,200
| +3,033% | +$76.5K |
|
|
SFIX
5812
CALL
Stitch Fix
SFIX
$536M
| $80K | ﹤0.01% |
30,400
-11,700
| -28% | -$36K |
|
5813
CALL
Teekay
TK
$1.01B
| $80K | ﹤0.01% |
11,100
-15,200
| -58% | -$119K |
|
5814
PUT
VirTra
VTSI
$34.9M
| $80K | ﹤0.01% |
7,800
+5,200
| +200% | +$55.6K |
|
5815
PUT
Vuzix
VUZI
$194M
| $80K | ﹤0.01% |
66,400
+40,600
| +157% | +$66.3K |
|
5816
CALL
Zevra Therapeutics
ZVRA
$562M
| $80K | ﹤0.01% |
13,900
-19,700
| -59% | -$121K |
|
5817
PUT
American States Water
AWR
$3.36B
| $79K | ﹤0.01% |
1,100
+900
| +450% | +$67.1K |
|
5818
BARK
BARK
$81.8M
| $79K | ﹤0.01% |
3,221
+2,829
| +722% | +$62K |
|
5819
PUT
Chefs' Warehouse
CHEF
$4.71B
| $79K | ﹤0.01% |
2,100
+900
| +75% | +$30.8K |
|
5820
CALL
Cue Biopharma
CUE
$113M
| $79K | ﹤0.01% |
1,393
-2,834
| -67% | -$200K |
|
|
CUK
5821
CALL
DELISTED
Carnival PLC
CUK
| $79K | ﹤0.01% |
5,400
-12,200
| -69% | -$181K |
|
5822
ProShares UltraShort Dow 30
DXD
$42.2M
| $79K | ﹤0.01% |
2,591
-487
| -16% | -$16K |
|
5823
CALL
Empire State Realty Trust
ESRT
$872M
| $79K | ﹤0.01% |
7,800
+800
| +11% | +$7.89K |
|
5824
CALL
FingerMotion
FNGR
$16.6M
| $79K | ﹤0.01% |
37,700
-18,400
| -33% | -$47K |
|
5825
iShares US Treasury Bond ETF
GOVT
$43.6B
| $79K | ﹤0.01% |
3,471
-20,748
| -86% | -$472K |
|
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.