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 | |
|---|---|---|---|---|---|---|
5301
PUT
Navitas Semiconductor
NVTS
$2.84B
| $131K | ﹤0.01% |
27,500
+11,700
| +74% | +$68.7K |
|
5302
CALL
Orion
OEC
$381M
| $131K | ﹤0.01% |
5,600
+5,400
| +2,700% | +$125K |
|
|
FIRY
5303
CALL
Firy Inc
FIRY
$148M
| $131K | ﹤0.01% |
20,200
-84,600
| -81% | -$519K |
|
5304
CALL
Vontier
VNT
$4.52B
| $131K | ﹤0.01% |
+2,900
| New | +$113K |
|
5305
CALL
AXT Inc
AXTI
$3.95B
| $130K | ﹤0.01% |
+28,400
| New | +$96.5K |
|
5306
PUT
BGC Group
BGC
$5.45B
| $130K | ﹤0.01% |
16,800
+3,300
| +24% | +$24.5K |
|
5307
Bank of Hawaii
BOH
$3.15B
| $130K | ﹤0.01% |
2,091
+922
| +79% | +$58.4K |
|
5308
PUT
BlueLinx
BXC
$422M
| $130K | ﹤0.01% |
1,000
+700
| +233% | +$82.3K |
|
5309
PUT
IAMGOLD
IAG
$8.2B
| $130K | ﹤0.01% |
39,300
-21,600
| -35% | -$57.5K |
|
5310
PUT
Kulicke & Soffa
KLIC
$4.67B
| $130K | ﹤0.01% |
2,600
-6,000
| -70% | -$300K |
|
5311
PUT
Regenxbio
RGNX
$620M
| $130K | ﹤0.01% |
6,200
+2,300
| +59% | +$40.9K |
|
5312
Rambus
RMBS
$9.87B
| $130K | ﹤0.01% |
+2,108
| New | +$133K |
|
5313
PUT
RPM International
RPM
$13.7B
| $130K | ﹤0.01% |
1,100
+600
| +120% | +$66.7K |
|
|
CVM.WS
5314
PUT
DELISTED
Cel-Sci Corp Series S
CVM.WS
| $130K | ﹤0.01% |
68,200
+10,700
| +19% | +$20.4K |
|
5315
PUT
Badger Meter
BMI
$3.89B
| $129K | ﹤0.01% |
800
+300
| +60% | +$46.1K |
|
|
EHAB
5316
CALL
DELISTED
Enhabit
EHAB
| $129K | ﹤0.01% |
11,100
-9,400
| -46% | -$94.2K |
|
5317
CALL
MarineMax
HZO
$759M
| $129K | ﹤0.01% |
3,900
+100
| +3% | +$3.2K |
|
|
MVO
5318
CALL
DELISTED
MV Oil Trust
MVO
| $129K | ﹤0.01% |
12,100
+12,000
| +12,000% | +$133K |
|
5319
CALL
Universal Corp
UVV
$1.31B
| $129K | ﹤0.01% |
2,500
+1,500
| +150% | +$81.6K |
|
5320
PUT
Chemed
CHE
$7.07B
| $128K | ﹤0.01% |
+200
| New | +$122K |
|
5321
CALL
CONMED
CNMD
$1.39B
| $128K | ﹤0.01% |
1,600
-10,500
| -87% | -$936K |
|
5322
CALL
Gulfport Energy Corp
GPOR
$2.9B
| $128K | ﹤0.01% |
800
-700
| -47% | -$96K |
|
5323
Maravai LifeSciences
MRVI
$969M
| $128K | ﹤0.01% |
14,764
-31,851
| -68% | -$215K |
|
5324
CALL
Power Integrations
POWI
$3.38B
| $128K | ﹤0.01% |
1,800
-36,100
| -95% | -$2.7M |
|
5325
PUT
Teledyne Technologies
TDY
$30.4B
| $128K | ﹤0.01% |
300
+200
| +200% | +$85.8K |
|
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.