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 | |
|---|---|---|---|---|---|---|
2501
CALL
MannKind Corp
MNKD
$1.28B
| $1.81M | ﹤0.01% |
398,700
+205,800
| +107% | +$808K |
|
2502
PUT
Royal Bank of Canada
RY
$291B
| $1.8M | ﹤0.01% |
17,900
-25,200
| -58% | -$2.49M |
|
2503
PUT
Vail Resorts
MTN
$5.19B
| $1.8M | ﹤0.01% |
8,100
+600
| +8% | +$133K |
|
2504
PUT
Nasdaq
NDAQ
$51.5B
| $1.8M | ﹤0.01% |
28,600
-39,800
| -58% | -$2.3M |
|
2505
PUT
Vipshop
VIPS
$6.84B
| $1.8M | ﹤0.01% |
109,000
-109,300
| -50% | -$1.84M |
|
|
SILV
2506
CALL
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $1.8M | ﹤0.01% |
270,300
+102,200
| +61% | +$597K |
|
2507
PUT
Agree Realty
ADC
$9.68B
| $1.8M | ﹤0.01% |
31,500
+9,200
| +41% | +$539K |
|
2508
American Electric Power
AEP
$73.7B
| $1.8M | ﹤0.01% |
20,899
-50,833
| -71% | -$4.13M |
|
2509
PUT
RingCentral
RNG
$4.05B
| $1.8M | ﹤0.01% |
51,800
+12,700
| +32% | +$427K |
|
|
TIGR
2510
PUT
UP Fintech Holding
TIGR
$845M
| $1.8M | ﹤0.01% |
522,900
+300,400
| +135% | +$1.19M |
|
2511
CALL
Patterson-UTI
PTEN
$3.87B
| $1.8M | ﹤0.01% |
150,500
+130,700
| +660% | +$1.45M |
|
|
DQ
2512
PUT
Daqo New Energy
DQ
$790M
| $1.79M | ﹤0.01% |
63,800
+41,400
| +185% | +$924K |
|
2513
Lincoln National
LNC
$7.91B
| $1.79M | ﹤0.01% |
+56,187
| New | +$1.55M |
|
2514
PUT
Rocket Lab Corp
RKLB
$39.9B
| $1.79M | ﹤0.01% |
436,500
+159,800
| +58% | +$738K |
|
2515
CALL
Kinross Gold
KGC
$28.5B
| $1.79M | ﹤0.01% |
292,600
-180,500
| -38% | -$982K |
|
2516
CALL
Jackson Financial
JXN
$8.32B
| $1.79M | ﹤0.01% |
27,100
+5,400
| +25% | +$293K |
|
2517
Abercrombie & Fitch
ANF
$4.17B
| $1.79M | ﹤0.01% |
+14,291
| New | +$1.63M |
|
2518
CALL
STAG Industrial
STAG
$7.86B
| $1.79M | ﹤0.01% |
46,600
+43,700
| +1,507% | +$1.66M |
|
2519
CALL
Cemex
CX
$17.4B
| $1.79M | ﹤0.01% |
198,600
+146,400
| +280% | +$1.17M |
|
|
HUYA
2520
CALL
Huya Inc
HUYA
$542M
| $1.79M | ﹤0.01% |
392,800
+324,700
| +477% | +$1.17M |
|
2521
PUT
McEwen Inc
MUX
$1.03B
| $1.78M | ﹤0.01% |
181,100
+19,900
| +12% | +$144K |
|
|
JNPR
2522
PUT
DELISTED
Juniper Networks
JNPR
| $1.78M | ﹤0.01% |
48,100
+6,700
| +16% | +$245K |
|
2523
PUT
Warby Parker
WRBY
$3.01B
| $1.78M | ﹤0.01% |
130,900
+17,000
| +15% | +$226K |
|
2524
Intellia Therapeutics
NTLA
$1.5B
| $1.78M | ﹤0.01% |
64,673
+52,922
| +450% | +$1.47M |
|
2525
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$263M
| $1.77M | ﹤0.01% |
30,100
+1,900
| +7% | +$114K |
|
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.