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 | |
|---|---|---|---|---|---|---|
|
PDCO
4376
CALL
DELISTED
Patterson Companies, Inc.
PDCO
| $304K | ﹤0.01% |
11,000
-600
| -5% | -$17.1K |
|
|
EFOR
4377
CALL
Everforth Inc
EFOR
$960M
| $303K | ﹤0.01% |
2,900
-1,800
| -38% | -$174K |
|
4378
CALL
Actinium Pharmaceuticals
ATNM
$26.3M
| $303K | ﹤0.01% |
38,700
+38,200
| +7,640% | +$246K |
|
4379
PUT
Invesco CurrencyShares British Pound Sterling Trust
FXB
$77.1M
| $303K | ﹤0.01% |
2,500
-4,100
| -62% | -$500K |
|
4380
CALL
Genpact
G
$6.22B
| $303K | ﹤0.01% |
9,200
-100
| -1% | -$3.48K |
|
4381
PUT
Methanex
MEOH
$4.23B
| $303K | ﹤0.01% |
6,800
+3,600
| +113% | +$161K |
|
4382
CALL
AerSale
ASLE
$291M
| $302K | ﹤0.01% |
42,200
+2,300
| +6% | +$21.2K |
|
4383
CALL
AptarGroup
ATR
$8.69B
| $302K | ﹤0.01% |
2,100
+900
| +75% | +$122K |
|
4384
PUT
Blackstone Secured Lending
BXSL
$5.36B
| $302K | ﹤0.01% |
9,700
+1,100
| +13% | +$32.2K |
|
4385
CALL
First Financial Bancorp
FFBC
$3.55B
| $302K | ﹤0.01% |
13,500
-16,900
| -56% | -$376K |
|
4386
CALL
Lifestance Health
LFST
$4.15B
| $302K | ﹤0.01% |
49,100
+10,400
| +27% | +$70K |
|
4387
Mitek Systems
MITK
$756M
| $302K | ﹤0.01% |
+21,454
| New | +$263K |
|
4388
PUT
Maravai LifeSciences
MRVI
$972M
| $302K | ﹤0.01% |
34,900
-42,100
| -55% | -$285K |
|
|
PENG
4389
Penguin Solutions Inc
PENG
$2.24B
| $302K | ﹤0.01% |
+11,493
| New | +$251K |
|
4390
CALL
Phreesia
PHR
$689M
| $301K | ﹤0.01% |
12,600
+700
| +6% | +$17.4K |
|
4391
CALL
Vericel Corp
VCEL
$2.38B
| $301K | ﹤0.01% |
5,800
+4,600
| +383% | +$202K |
|
4392
CALL
Ouster
OUST
$2.11B
| $300K | ﹤0.01% |
37,800
-130,900
| -78% | -$745K |
|
4393
CALL
Paymentus
PAY
$4.62B
| $300K | ﹤0.01% |
13,200
+3,900
| +42% | +$70.3K |
|
|
BLUE
4394
PUT
DELISTED
bluebird bio
BLUE
| $299K | ﹤0.01% |
11,700
-8,045
| -41% | -$206K |
|
4395
ProFrac Holding
ACDC
$653M
| $298K | ﹤0.01% |
+35,670
| New | +$274K |
|
4396
Antero Midstream
AM
$10.2B
| $298K | ﹤0.01% |
21,255
+1,022
| +5% | +$13.1K |
|
|
CAN
4397
PUT
Canaan Creative
CAN
$172M
| $298K | ﹤0.01% |
196,600
+117,600
| +149% | +$199K |
|
|
FPI
4398
PUT
Farmland Partners
FPI
$415M
| $298K | ﹤0.01% |
26,900
-400
| -1% | -$4.5K |
|
4399
PUT
Full Truck Alliance
YMM
$10B
| $298K | ﹤0.01% |
41,100
-18,100
| -31% | -$121K |
|
|
ACB
4400
Aurora Cannabis
ACB
$169M
| $297K | ﹤0.01% |
67,801
+63,373
| +1,431% | +$245K |
|
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.