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 | |
|---|---|---|---|---|---|---|
2076
Navios Maritime Partners
NMM
$2.25B
| $2.53M | ﹤0.01% |
40,371
-3,729
| -8% | -$192K |
|
2077
CALL
Parsons
PSN
$6.28B
| $2.52M | ﹤0.01% |
24,300
+8,000
| +49% | +$718K |
|
2078
CALL
Caleres
CAL
$396M
| $2.52M | ﹤0.01% |
76,100
+17,100
| +29% | +$621K |
|
2079
CALL
Leidos
LDOS
$14.1B
| $2.51M | ﹤0.01% |
15,400
-60,700
| -80% | -$9.18M |
|
2080
CALL
Ametek
AME
$55.5B
| $2.51M | ﹤0.01% |
14,600
+10,100
| +224% | +$1.69M |
|
2081
CALL
Exelixis
EXEL
$13.9B
| $2.5M | ﹤0.01% |
96,500
-284,200
| -75% | -$7.06M |
|
2082
CALL
Cooper Companies
COO
$13.7B
| $2.49M | ﹤0.01% |
22,600
+11,400
| +102% | +$1.11M |
|
2083
PUT
Incyte
INCY
$23.5B
| $2.48M | ﹤0.01% |
37,600
-58,100
| -61% | -$3.7M |
|
|
GPGI
2084
CALL
GPGI Inc
GPGI
$4.06B
| $2.48M | ﹤0.01% |
212,988
+193,724
| +1,006% | +$1.64M |
|
2085
CALL
Molina Healthcare
MOH
$10.3B
| $2.48M | ﹤0.01% |
7,200
+5,600
| +350% | +$1.85M |
|
2086
PUT
FirstEnergy
FE
$28.9B
| $2.48M | ﹤0.01% |
55,900
+39,700
| +245% | +$1.67M |
|
2087
PUT
Ball Corp
BALL
$17B
| $2.48M | ﹤0.01% |
36,500
-19,000
| -34% | -$1.21M |
|
|
IRBT
2088
CALL
DELISTED
iRobot
IRBT
| $2.48M | ﹤0.01% |
285,200
-17,200
| -6% | -$149K |
|
|
HTGCR
2089
CALL
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $2.48M | ﹤0.01% |
126,200
+600
| +0.5% | +$11.8K |
|
2090
PUT
Aramark
ARMK
$15B
| $2.47M | ﹤0.01% |
63,800
+15,400
| +32% | +$543K |
|
2091
CALL
Clover Health Investments
CLOV
$2.28B
| $2.47M | ﹤0.01% |
874,600
+321,000
| +58% | +$735K |
|
2092
Capital One
COF
$124B
| $2.46M | ﹤0.01% |
+16,468
| New | +$2.35M |
|
2093
PUT
Neurocrine Biosciences
NBIX
$17.7B
| $2.46M | ﹤0.01% |
21,400
-46,100
| -68% | -$6.32M |
|
2094
CALL
Encompass Health
EHC
$11.2B
| $2.46M | ﹤0.01% |
25,500
+16,700
| +190% | +$1.5M |
|
2095
PUT
InterDigital
IDCC
$6.68B
| $2.46M | ﹤0.01% |
17,400
-1,500
| -8% | -$197K |
|
2096
Trump Media & Technology Group
DJT
$2.37B
| $2.46M | ﹤0.01% |
153,318
-74,485
| -33% | -$1.81M |
|
2097
PUT
Molson Coors Class B
TAP
$7.68B
| $2.46M | ﹤0.01% |
42,800
+14,000
| +49% | +$749K |
|
|
CGC
2098
PUT
Canopy Growth
CGC
$375M
| $2.46M | ﹤0.01% |
510,000
+165,700
| +48% | +$1M |
|
2099
PUT
Amplify Online Retail ETF
IBUY
$106M
| $2.46M | ﹤0.01% |
376,300
-292,300
| -44% | -$16.3M |
|
2100
CALL
Weyerhaeuser
WY
$17.3B
| $2.45M | ﹤0.01% |
72,500
+42,800
| +144% | +$1.32M |
|
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.