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 | |
|---|---|---|---|---|---|---|
6576
CALL
Getty Images
GETY
$158M
| $36K | ﹤0.01% |
8,900
-2,900
| -25% | -$13.4K |
|
|
GPMT
6577
PUT
Granite Point Mortgage Trust
GPMT
$64.7M
| $36K | ﹤0.01% |
7,600
+700
| +10% | +$3.64K |
|
6578
CALL
Idaho Strategic Resources
IDR
$462M
| $36K | ﹤0.01% |
4,300
-6,300
| -59% | -$44.7K |
|
|
MRSN
6579
DELISTED
Mersana Therapeutics
MRSN
| $36K | ﹤0.01% |
322
+89
| +38% | +$8.85K |
|
|
NGD
6580
PUT
DELISTED
New Gold Inc
NGD
| $36K | ﹤0.01% |
21,600
+13,800
| +177% | +$18.8K |
|
6581
PUT
Philips
PHG
$25.8B
| $36K | ﹤0.01% |
2,012
-164,561
| -99% | -$3.15M |
|
6582
CALL
Redwire
RDW
$2.02B
| $36K | ﹤0.01% |
8,300
-23,700
| -74% | -$75.3K |
|
6583
CALL
Senseonics Holdings Inc
SENS
$265M
| $36K | ﹤0.01% |
3,450
-750
| -18% | -$8.7K |
|
|
BNKK
6584
CALL
Bonk Inc
BNKK
$7.96M
| $36K | ﹤0.01% |
437
-1,060
| -71% | -$96K |
|
|
UCTT
6585
PUT
Ultra Clean Holdings
UCTT
$3.73B
| $36K | ﹤0.01% |
800
-1,300
| -62% | -$52.8K |
|
6586
PUT
VEON
VEON
$3.66B
| $36K | ﹤0.01% |
1,500
+900
| +150% | +$20K |
|
6587
VTEX
VTEX
$745M
| $36K | ﹤0.01% |
4,504
-625
| -12% | -$5K |
|
6588
John Wiley & Sons Class A
WLY
$2.66B
| $36K | ﹤0.01% |
964
-820
| -46% | -$28.1K |
|
|
ZIMV
6589
DELISTED
ZimVie
ZIMV
| $36K | ﹤0.01% |
2,226
-62,661
| -97% | -$1.12M |
|
|
LBPH
6590
DELISTED
Longboard Pharmaceuticals, Inc. Common Stock
LBPH
| $36K | ﹤0.01% |
+1,689
| New | +$36.8K |
|
6591
PUT
Alto Ingredients
ALTO
$358M
| $35K | ﹤0.01% |
16,500
-1,700
| -9% | -$3.58K |
|
6592
Vita Coco
COCO
$3.82B
| $35K | ﹤0.01% |
+1,443
| New | +$33.5K |
|
6593
CALL
Definitive Healthcare
DH
$75.7M
| $35K | ﹤0.01% |
4,400
-400
| -8% | -$3.54K |
|
|
EARN
6594
Ellington Residential Mortgage REIT
EARN
$168M
| $35K | ﹤0.01% |
5,189
+5,064
| +4,051% | +$31.1K |
|
6595
Global Partners
GLP
$1.66B
| $35K | ﹤0.01% |
+802
| New | +$36.5K |
|
|
LKFT
6596
CALL
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.81B
| $35K | ﹤0.01% |
1,100
-13,900
| -93% | -$517K |
|
6597
Helmerich & Payne
HP
$3.37B
| $35K | ﹤0.01% |
+855
| New | +$32.3K |
|
6598
CALL
Ivanhoe Electric
IE
$1.48B
| $35K | ﹤0.01% |
+3,600
| New | +$31K |
|
6599
PUT
Inter&Co
INTR
$2.49B
| $35K | ﹤0.01% |
6,300
+3,700
| +142% | +$20.3K |
|
6600
CALL
Kelly Services Class A
KELYA
$521M
| $35K | ﹤0.01% |
1,400
-900
| -39% | -$20.2K |
|
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.