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 | |
|---|---|---|---|---|---|---|
|
ACCD
4601
DELISTED
Accolade Inc
ACCD
| $252K | ﹤0.01% |
24,077
-68,571
| -74% | -$779K |
|
4602
PUT
Zeta Global
ZETA
$5.5B
| $251K | ﹤0.01% |
+23,000
| New | +$229K |
|
|
SLCA
4603
PUT
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $251K | ﹤0.01% |
20,300
+17,000
| +515% | +$190K |
|
4604
Renaissance IPO ETF
IPO
$149M
| $250K | ﹤0.01% |
6,030
+2,977
| +98% | +$112K |
|
4605
PUT
Larimar Therapeutics
LRMR
$377M
| $250K | ﹤0.01% |
+33,000
| New | +$257K |
|
4606
Omeros
OMER
$845M
| $250K | ﹤0.01% |
+72,477
| New | +$276K |
|
|
DM
4607
DELISTED
Desktop Metal, Inc.
DM
| $250K | ﹤0.01% |
+28,522
| New | +$183K |
|
|
ACRE
4608
PUT
Ares Commercial Real Estate
ACRE
$247M
| $249K | ﹤0.01% |
33,500
+14,800
| +79% | +$129K |
|
4609
PUT
B2Gold
BTG
$4.98B
| $249K | ﹤0.01% |
95,600
+23,600
| +33% | +$63.7K |
|
4610
CALL
Sprinklr
CXM
$1.51B
| $249K | ﹤0.01% |
20,300
-47,900
| -70% | -$610K |
|
|
4611
Sprinklr
CXM
$1.51B
| $249K | ﹤0.01% |
+20,339
| New | +$259K |
|
4612
CALL
Ecopetrol
EC
$33.7B
| $249K | ﹤0.01% |
21,100
-39,500
| -65% | -$457K |
|
|
AGNT
4613
CALL
AGNT Inc
AGNT
$629M
| $249K | ﹤0.01% |
24,200
-30,300
| -56% | -$372K |
|
4614
Yext
YEXT
$573M
| $249K | ﹤0.01% |
41,409
+31,522
| +319% | +$186K |
|
4615
CALL
Hamilton Lane
HLNE
$3.88B
| $248K | ﹤0.01% |
2,200
-19,400
| -90% | -$2.19M |
|
4616
CALL
Teleflex
TFX
$5.96B
| $248K | ﹤0.01% |
1,100
-69,500
| -98% | -$16.5M |
|
|
AD
4617
Array Digital Infrastructure
AD
$3.04B
| $248K | ﹤0.01% |
6,797
-18,691
| -73% | -$730K |
|
4618
El Pollo Loco
LOCO
$503M
| $247K | ﹤0.01% |
25,421
-13,980
| -35% | -$126K |
|
4619
CALL
MYR Group
MYRG
$5.01B
| $247K | ﹤0.01% |
1,400
-8,400
| -86% | -$1.29M |
|
|
AUGX
4620
PUT
DELISTED
Augmedix, Inc. Common Stock
AUGX
| $247K | ﹤0.01% |
60,500
+13,700
| +29% | +$61.3K |
|
4621
PUT
Capitol Federal Financial
CFFN
$1.09B
| $246K | ﹤0.01% |
41,300
| – | – |
|
4622
Match Group
MTCH
$9.19B
| $246K | ﹤0.01% |
6,793
-126,080
| -95% | -$4.56M |
|
4623
CALL
Quad
QUAD
$479M
| $246K | ﹤0.01% |
46,400
+24,300
| +110% | +$131K |
|
4624
CALL
SouthState Bank Corp
SSB
$10.3B
| $246K | ﹤0.01% |
2,900
-15,300
| -84% | -$1.26M |
|
4625
PUT
Northeast Community Bancorp
NECB
$373M
| $245K | ﹤0.01% |
+15,600
| New | +$253K |
|
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.