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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2051
CALL
Blackstone Mortgage Trust
BXMT
$2.82B
| $2.6M | ﹤0.01% |
136,700
-211,100
| -61% | -$3.88M |
|
2052
CALL
Jefferies Financial Group
JEF
$12.9B
| $2.6M | ﹤0.01% |
42,200
+31,500
| +294% | +$1.79M |
|
2053
Brink's
BCO
$5.02B
| $2.59M | ﹤0.01% |
+22,419
| New | +$2.37M |
|
2054
PUT
Omega Healthcare
OHI
$15.4B
| $2.59M | ﹤0.01% |
63,700
+16,600
| +35% | +$628K |
|
2055
PUT
Keysight
KEYS
$54.5B
| $2.59M | ﹤0.01% |
16,300
-21,400
| -57% | -$3.05M |
|
2056
CALL
HDFC Bank
HDB
$119B
| $2.59M | ﹤0.01% |
82,800
-47,800
| -37% | -$1.47M |
|
2057
PUT
Recursion Pharmaceuticals
RXRX
$1.57B
| $2.59M | ﹤0.01% |
393,000
+118,000
| +43% | +$846K |
|
2058
PUT
RenaissanceRe
RNR
$13.7B
| $2.59M | ﹤0.01% |
9,500
-10,300
| -52% | -$2.49M |
|
2059
CALL
Rockwell Automation
ROK
$51.4B
| $2.58M | ﹤0.01% |
9,600
-3,900
| -29% | -$1.04M |
|
2060
Box
BOX
$4.02B
| $2.57M | ﹤0.01% |
+78,461
| New | +$2.29M |
|
|
SAVE
2061
CALL
DELISTED
Spirit Airlines, Inc.
SAVE
| $2.57M | ﹤0.01% |
1,069,500
+324,000
| +43% | +$892K |
|
2062
CALL
Northern Trust
NTRS
$22.2B
| $2.56M | ﹤0.01% |
28,500
-30,600
| -52% | -$2.68M |
|
2063
CALL
Packaging Corp of America
PKG
$22.7B
| $2.56M | ﹤0.01% |
11,900
-18,100
| -60% | -$3.6M |
|
|
VSXY
2064
PUT
Victoria's Secret
VSXY
$6.64B
| $2.55M | ﹤0.01% |
99,400
-69,000
| -41% | -$1.46M |
|
2065
CALL
West Pharmaceutical
WST
$23.1B
| $2.55M | ﹤0.01% |
8,500
+300
| +4% | +$91.9K |
|
2066
MasTec
MTZ
$26.7B
| $2.55M | ﹤0.01% |
20,691
-22,254
| -52% | -$2.43M |
|
2067
Imperial Petroleum
IMPP
$215M
| $2.55M | ﹤0.01% |
613,511
+592,569
| +2,830% | +$2.34M |
|
2068
CALL
Omnicom Group
OMC
$22.7B
| $2.54M | ﹤0.01% |
24,600
-2,800
| -10% | -$269K |
|
2069
CALL
GigaCloud Technology
GCT
$1.35B
| $2.54M | ﹤0.01% |
110,500
-143,100
| -56% | -$3.43M |
|
2070
IMAX
IMAX
$2.38B
| $2.54M | ﹤0.01% |
123,838
+18,852
| +18% | +$371K |
|
2071
CALL
LPL Financial
LPLA
$26.3B
| $2.54M | ﹤0.01% |
10,900
+5,500
| +102% | +$1.24M |
|
2072
CALL
RxSight
RXST
$215M
| $2.54M | ﹤0.01% |
51,300
+49,300
| +2,465% | +$2.53M |
|
2073
PUT
Eagle Materials
EXP
$6.6B
| $2.53M | ﹤0.01% |
8,800
-400
| -4% | -$100K |
|
|
SNV
2074
DELISTED
Synovus
SNV
| $2.53M | ﹤0.01% |
56,926
+1,675
| +3% | +$73.3K |
|
2075
VanEck Junior Gold Miners ETF
GDXJ
$7.06B
| $2.53M | ﹤0.01% |
51,832
-28,188
| -35% | -$1.3M |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.