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 | |
|---|---|---|---|---|---|---|
|
IDEX
7101
PUT
DELISTED
Ideanomics, Inc. Common Stock
IDEX
| $20K | ﹤0.01% |
21,700
+20,200
| +1,347% | +$24K |
|
7102
CALL
ACI Worldwide
ACIW
$6.12B
| $19K | ﹤0.01% |
600
-300
| -33% | -$9.27K |
|
7103
American Eagle Outfitters
AEO
$2.94B
| $19K | ﹤0.01% |
769
-195,588
| -100% | -$4.34M |
|
7104
CALL
Avanos Medical
AVNS
| $19K | ﹤0.01% |
1,000
-2,300
| -70% | -$44.5K |
|
7105
Amplify Lithium & Battery Technology ETF
BATT
$112M
| $19K | ﹤0.01% |
2,083
+893
| +75% | +$8.25K |
|
|
BHR
7106
Braemar Hotels & Resorts
BHR
$163M
| $19K | ﹤0.01% |
+9,925
| New | +$21.9K |
|
7107
PUT
China Automotive Systems
CAAS
$131M
| $19K | ﹤0.01% |
+5,500
| New | +$18.3K |
|
7108
Chunghwa Telecom
CHT
$33.5B
| $19K | ﹤0.01% |
500
+438
| +706% | +$16.8K |
|
7109
Cohu
COHU
$1.86B
| $19K | ﹤0.01% |
+591
| New | +$19.2K |
|
7110
Americold
COLD
$4.21B
| $19K | ﹤0.01% |
775
-1,516
| -66% | -$41.4K |
|
7111
CALL
CareTrust REIT
CTRE
$10B
| $19K | ﹤0.01% |
800
-2,200
| -73% | -$49.6K |
|
7112
GrafTech
EAF
$184M
| $19K | ﹤0.01% |
+1,447
| New | +$22.6K |
|
7113
eHealth
EHTH
$41.9M
| $19K | ﹤0.01% |
3,248
-2,908
| -47% | -$19.3K |
|
7114
CALL
Fidus Investment
FDUS
$759M
| $19K | ﹤0.01% |
1,000
-400
| -29% | -$7.82K |
|
7115
CALL
Flux Power
FLUX
$10.9M
| $19K | ﹤0.01% |
4,500
+3,100
| +221% | +$14.4K |
|
|
FRGE
7116
PUT
DELISTED
Forge Global Holdings
FRGE
| $19K | ﹤0.01% |
680
+613
| +915% | +$19.1K |
|
7117
PUT
Fulton Financial
FULT
$4.68B
| $19K | ﹤0.01% |
+1,200
| New | +$18.7K |
|
|
HOUS
7118
PUT
DELISTED
Anywhere Real Estate
HOUS
| $19K | ﹤0.01% |
3,200
-33,200
| -91% | -$219K |
|
7119
Immatics
IMTX
$1.23B
| $19K | ﹤0.01% |
1,874
-2,913
| -61% | -$34K |
|
7120
Ispire Technology
ISPR
$86.1M
| $19K | ﹤0.01% |
+3,240
| New | +$32.6K |
|
7121
iShares Russell Mid-Cap Growth ETF
IWP
$19.4B
| $19K | ﹤0.01% |
+171
| New | +$18.5K |
|
|
JHG
7122
CALL
DELISTED
Janus Henderson
JHG
| $19K | ﹤0.01% |
600
| – | – |
|
7123
PUT
LENSAR
LNSR
$64.5M
| $19K | ﹤0.01% |
5,600
+5,200
| +1,300% | +$21.4K |
|
|
ORIO
7124
PUT
Orion Digital Corp
ORIO
$15.7M
| $19K | ﹤0.01% |
+9,700
| New | +$17.5K |
|
7125
PUT
Myriad Genetics
MYGN
$476M
| $19K | ﹤0.01% |
900
-900
| -50% | -$19.3K |
|
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.