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 | |
|---|---|---|---|---|---|---|
|
DOO
4801
PUT
Bombardier Recreational Products
DOO
$4.58B
| $208K | ﹤0.01% |
3,100
-700
| -18% | -$46.2K |
|
4802
Fox Class A
FOXA
$24.7B
| $208K | ﹤0.01% |
+6,655
| New | +$202K |
|
4803
PUT
HighPeak Energy
HPK
$838M
| $208K | ﹤0.01% |
13,200
-12,800
| -49% | -$190K |
|
4804
CALL
Ocugen
OCGN
$427M
| $208K | ﹤0.01% |
127,300
+36,700
| +41% | +$30.8K |
|
4805
PUT
PAR Technology
PAR
$695M
| $208K | ﹤0.01% |
4,600
+2,300
| +100% | +$102K |
|
4806
CALL
Runway Growth Finance
RWAY
$234M
| $208K | ﹤0.01% |
17,200
-5,600
| -25% | -$72.2K |
|
4807
CALL
Suburban Propane Partners
SPH
$1.23B
| $208K | ﹤0.01% |
10,200
-11,200
| -52% | -$219K |
|
|
AEVA
4808
CALL
Aeva Technologies
AEVA
$1.13B
| $207K | ﹤0.01% |
52,900
+40,780
| +336% | +$197K |
|
|
CKPT
4809
CALL
DELISTED
Checkpoint Therapeutics
CKPT
| $207K | ﹤0.01% |
101,100
+92,800
| +1,118% | +$185K |
|
4810
CALL
Casella Waste Systems
CWST
$5.69B
| $207K | ﹤0.01% |
2,100
-8,600
| -80% | -$771K |
|
4811
IMAX
IMAX
$2.61B
| $207K | ﹤0.01% |
+12,814
| New | +$195K |
|
|
KREF
4812
CALL
KKR Real Estate Finance Trust
KREF
$453M
| $207K | ﹤0.01% |
20,600
+17,500
| +565% | +$192K |
|
|
MRUS
4813
PUT
DELISTED
Merus
MRUS
| $207K | ﹤0.01% |
4,600
-6,000
| -57% | -$243K |
|
4814
CALL
Navigator Holdings
NVGS
$1.37B
| $207K | ﹤0.01% |
13,500
+6,400
| +90% | +$98.6K |
|
|
CERE
4815
PUT
DELISTED
Cerevel Therapeutics Holdings, Inc. Common Stock
CERE
| $207K | ﹤0.01% |
4,900
-15,200
| -76% | -$638K |
|
4816
PUT
Core Scientific
CORZ
$7.01B
| $206K | ﹤0.01% |
+58,300
| New | +$202K |
|
|
DAWN
4817
CALL
DELISTED
Day One Biopharmaceuticals
DAWN
| $206K | ﹤0.01% |
12,500
-500
| -4% | -$7.48K |
|
|
DAWN
4818
PUT
DELISTED
Day One Biopharmaceuticals
DAWN
| $206K | ﹤0.01% |
12,500
+10,500
| +525% | +$157K |
|
4819
PUT
Robert Half
RHI
$3.81B
| $206K | ﹤0.01% |
2,600
+900
| +53% | +$72.5K |
|
4820
PUT
Jasper Therapeutics
JSPR
$20.7M
| $205K | ﹤0.01% |
+7,000
| New | +$124K |
|
4821
Rocket Lab Corp
RKLB
$40.4B
| $205K | ﹤0.01% |
49,943
-350,732
| -88% | -$1.62M |
|
4822
PUT
Trinity Capital Inc.
TRIN
$1.56B
| $205K | ﹤0.01% |
14,000
+9,500
| +211% | +$137K |
|
4823
CVR Partners
UAN
$1.35B
| $205K | ﹤0.01% |
2,619
-1,407
| -35% | -$98.4K |
|
4824
CALL
Veritone
VERI
$97.6M
| $205K | ﹤0.01% |
39,000
-4,700
| -11% | -$11.1K |
|
4825
CALL
Xeris Biopharma Holdings
XERS
$1.45B
| $205K | ﹤0.01% |
92,900
-43,700
| -32% | -$113K |
|
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.