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 | |
|---|---|---|---|---|---|---|
6526
Range Resources
RRC
$9.25B
| $38K | ﹤0.01% |
+1,112
| New | +$34.4K |
|
6527
PUT
Stevanato
STVN
$5.49B
| $38K | ﹤0.01% |
1,200
+700
| +140% | +$21.3K |
|
6528
PUT
Frontier Group Holdings
ULCC
$1.63B
| $38K | ﹤0.01% |
4,700
+4,300
| +1,075% | +$27.8K |
|
|
UROY
6529
PUT
Uranium Royalty Corp
UROY
$1.33B
| $38K | ﹤0.01% |
16,300
-13,600
| -45% | -$38.6K |
|
6530
CALL
Wyndham Hotels & Resorts
WH
$5.62B
| $38K | ﹤0.01% |
500
-1,100
| -69% | -$86.3K |
|
|
CMBT
6531
CALL
CMB.TECH NV
CMBT
$4.69B
| $38K | ﹤0.01% |
2,300
+1,500
| +188% | +$26.1K |
|
|
OKUR
6532
CALL
OnKure Therapeutics
OKUR
$158M
| $38K | ﹤0.01% |
2,290
+80
| +4% | +$1.32K |
|
|
TWKS
6533
DELISTED
Thoughtworks Holding, Inc. Common Stock
TWKS
| $38K | ﹤0.01% |
15,044
-5,597
| -27% | -$21.5K |
|
6534
Airgain
AIRG
$74.9M
| $37K | ﹤0.01% |
6,929
+1,584
| +30% | +$6.72K |
|
6535
AMC Global Media
AMCX
$487M
| $37K | ﹤0.01% |
+3,064
| New | +$46.5K |
|
|
GOLD
6536
Gold.com Inc
GOLD
$1.18B
| $37K | ﹤0.01% |
+1,213
| New | +$33.4K |
|
6537
PUT
American Vanguard Corp
AVD
$70.4M
| $37K | ﹤0.01% |
2,900
-3,100
| -52% | -$34K |
|
6538
Avnet
AVT
$7.2B
| $37K | ﹤0.01% |
+747
| New | +$35K |
|
6539
Black Diamond Therapeutics
BDTX
$95.7M
| $37K | ﹤0.01% |
7,492
+7,266
| +3,215% | +$29.3K |
|
6540
PUT
CACI
CACI
$10.6B
| $37K | ﹤0.01% |
+100
| New | +$35.5K |
|
6541
CALL
Dakota Gold
DC
$601M
| $37K | ﹤0.01% |
16,000
+1,000
| +7% | +$2.16K |
|
6542
ESAB
ESAB
$5.3B
| $37K | ﹤0.01% |
338
+145
| +75% | +$13.5K |
|
6543
PUT
Expensify
EXFY
$179M
| $37K | ﹤0.01% |
20,200
+17,700
| +708% | +$33.6K |
|
6544
Frontline
FRO
$8.8B
| $37K | ﹤0.01% |
1,602
-110,584
| -99% | -$2.5M |
|
6545
Fidelity MSCI Information Technology Index ETF
FTEC
$19.8B
| $37K | ﹤0.01% |
238
+150
| +170% | +$22.6K |
|
6546
PUT
Grocery Outlet
GO
$897M
| $37K | ﹤0.01% |
1,300
-5,200
| -80% | -$137K |
|
6547
PUT
Hudbay
HBM
$9.94B
| $37K | ﹤0.01% |
5,300
-15,100
| -74% | -$87.8K |
|
6548
PUT
Harmonic Inc
HLIT
$1.24B
| $37K | ﹤0.01% |
2,800
-1,100
| -28% | -$14K |
|
6549
PUT
OrthoPediatrics
KIDS
$514M
| $37K | ﹤0.01% |
1,300
-3,900
| -75% | -$109K |
|
6550
loanDepot
LDI
$542M
| $37K | ﹤0.01% |
14,324
-47,755
| -77% | -$128K |
|
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.