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 | |
|---|---|---|---|---|---|---|
2426
CALL
Kosmos Energy
KOS
$1.56B
| $1.95M | ﹤0.01% |
327,000
+83,300
| +34% | +$501K |
|
2427
PUT
3D Systems Corp
DDD
$420M
| $1.95M | ﹤0.01% |
438,600
+245,000
| +127% | +$1.21M |
|
2428
PUT
CoreCivic
CXW
$3.1B
| $1.95M | ﹤0.01% |
124,600
+69,400
| +126% | +$1.01M |
|
2429
CALL
Fastly Inc
FSLY
$3.17B
| $1.94M | ﹤0.01% |
149,600
-149,200
| -50% | -$2.52M |
|
2430
CALL
Core Scientific
CORZ
$7.23B
| $1.94M | ﹤0.01% |
+547,600
| New | +$1.9M |
|
2431
PUT
Universal Technical Institute
UTI
$2.08B
| $1.94M | ﹤0.01% |
+121,600
| New | +$1.77M |
|
2432
CALL
Future Fuel
FF
$204M
| $1.94M | ﹤0.01% |
240,500
+235,200
| +4,438% | +$1.44M |
|
|
AY
2433
CALL
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $1.94M | ﹤0.01% |
104,800
+95,000
| +969% | +$1.79M |
|
2434
PUT
Evolv Technologies
EVLV
$943M
| $1.94M | ﹤0.01% |
434,900
+204,900
| +89% | +$885K |
|
|
MPT
2435
Medical Properties Trust
MPT
$2.89B
| $1.93M | ﹤0.01% |
+411,307
| New | +$1.57M |
|
2436
Golar LNG
GLNG
$4.95B
| $1.93M | ﹤0.01% |
80,322
-96,474
| -55% | -$2.15M |
|
2437
CALL
TransUnion
TRU
$14.8B
| $1.93M | ﹤0.01% |
24,200
-121,300
| -83% | -$8.89M |
|
|
ETRN
2438
PUT
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $1.93M | ﹤0.01% |
154,600
-68,000
| -31% | -$730K |
|
2439
CALL
Annovis Bio
ANVS
$70.6M
| $1.92M | ﹤0.01% |
161,600
+152,100
| +1,601% | +$1.66M |
|
2440
State Street SPDR Portfolio S&P 500 Growth ETF
SPYG
$50.7B
| $1.92M | ﹤0.01% |
+26,299
| New | +$1.83M |
|
2441
CALL
Nordic American Tanker
NAT
$1.37B
| $1.92M | ﹤0.01% |
490,500
+386,600
| +372% | +$1.62M |
|
|
EDR
2442
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $1.92M | ﹤0.01% |
74,512
+72,685
| +3,978% | +$1.78M |
|
2443
Snap
SNAP
$7.32B
| $1.92M | ﹤0.01% |
166,889
-261,028
| -61% | -$3.5M |
|
2444
PUT
Brinker International
EAT
$8.02B
| $1.91M | ﹤0.01% |
38,500
-12,900
| -25% | -$571K |
|
2445
CALL
AvalonBay Communities
AVB
$27.1B
| $1.91M | ﹤0.01% |
10,300
-9,200
| -47% | -$1.65M |
|
|
SKX
2446
PUT
DELISTED
Skechers
SKX
| $1.91M | ﹤0.01% |
31,200
-107,000
| -77% | -$6.53M |
|
2447
CALL
Silicon Laboratories
SLAB
$7.15B
| $1.91M | ﹤0.01% |
13,300
+800
| +6% | +$106K |
|
2448
PUT
Krispy Kreme
DNUT
$543M
| $1.91M | ﹤0.01% |
125,400
+112,500
| +872% | +$1.5M |
|
2449
CALL
Intuitive Machines
LUNR
$2.07B
| $1.91M | ﹤0.01% |
+305,700
| New | +$1.45M |
|
2450
PUT
GlobalFoundries
GFS
$29.4B
| $1.91M | ﹤0.01% |
36,600
-1,800
| -5% | -$98.6K |
|
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.