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 | |
|---|---|---|---|---|---|---|
3426
PUT
Service Corp International
SCI
$11.7B
| $749K | ﹤0.01% |
10,100
-34,300
| -77% | -$2.42M |
|
3427
CALL
MoonLake Immunotherapeutics
MLTX
$1.61B
| $748K | ﹤0.01% |
14,900
-2,800
| -16% | -$152K |
|
3428
CoinShares ETF Trust CoinShares Bitcoin Mining ETF
WGMI
$238M
| $747K | ﹤0.01% |
40,852
+24,338
| +147% | +$390K |
|
3429
CALL
Anavex Life Sciences
AVXL
$237M
| $746K | ﹤0.01% |
146,600
-85,000
| -37% | -$478K |
|
3430
CALL
Integer Holdings
ITGR
$3.4B
| $746K | ﹤0.01% |
6,400
-18,100
| -74% | -$1.92M |
|
|
AZPN
3431
PUT
DELISTED
Aspen Technology Inc
AZPN
| $746K | ﹤0.01% |
3,500
+3,400
| +3,400% | +$670K |
|
3432
PUT
BCE
BCE
$20.3B
| $744K | ﹤0.01% |
21,900
+6,700
| +44% | +$255K |
|
3433
CALL
Cogent Communications
CCOI
$635M
| $744K | ﹤0.01% |
11,400
+700
| +7% | +$51.1K |
|
3434
CALL
Aurora
AUR
$11.5B
| $743K | ﹤0.01% |
263,700
+190,800
| +262% | +$547K |
|
3435
PUT
DigitalBridge
DBRG
$2.93B
| $743K | ﹤0.01% |
38,600
-5,200
| -12% | -$97.8K |
|
3436
PUT
Cal-Maine
CALM
$4.39B
| $741K | ﹤0.01% |
12,600
-17,100
| -58% | -$973K |
|
3437
PUT
Cirrus Logic
CRUS
$6.86B
| $740K | ﹤0.01% |
8,000
+2,900
| +57% | +$250K |
|
3438
CALL
Morningstar
MORN
$7.38B
| $740K | ﹤0.01% |
2,400
+1,200
| +100% | +$346K |
|
3439
PUT
Xenon Pharmaceuticals
XENE
$6.29B
| $740K | ﹤0.01% |
17,200
-101,500
| -86% | -$4.67M |
|
3440
CALL
Huazhu Hotels Group
HTHT
$13.2B
| $739K | ﹤0.01% |
19,100
+17,100
| +855% | +$595K |
|
3441
PUT
ICL Group
ICL
$6.78B
| $739K | ﹤0.01% |
+137,400
| New | +$676K |
|
|
BIG
3442
CALL
DELISTED
Big Lots, Inc.
BIG
| $739K | ﹤0.01% |
170,800
-49,200
| -22% | -$260K |
|
3443
Broadridge
BR
$18.4B
| $737K | ﹤0.01% |
+3,602
| New | +$726K |
|
3444
United States Copper Index Fund
CPER
$741M
| $737K | ﹤0.01% |
29,356
+7,293
| +33% | +$176K |
|
3445
CALL
Equitable Holdings
EQH
$13.5B
| $737K | ﹤0.01% |
19,400
-17,800
| -48% | -$605K |
|
|
EVBG
3446
DELISTED
Everbridge, Inc. Common Stock
EVBG
| $737K | ﹤0.01% |
+21,187
| New | +$597K |
|
3447
PUT
Burford Capital
BUR
$960M
| $734K | ﹤0.01% |
46,000
-2,000
| -4% | -$29.7K |
|
3448
CALL
Qualys
QLYS
$4.79B
| $734K | ﹤0.01% |
4,400
-72,700
| -94% | -$12.8M |
|
3449
CALL
Brunswick
BC
$5.35B
| $733K | ﹤0.01% |
7,600
+4,300
| +130% | +$378K |
|
3450
PUT
Ericsson
ERIC
$32.5B
| $733K | ﹤0.01% |
133,100
-17,400
| -12% | -$98.1K |
|
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.