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 | |
|---|---|---|---|---|---|---|
1976
CALL
Hexcel
HXL
$8.32B
| $2.83M | ﹤0.01% |
45,700
+43,900
| +2,439% | +$2.76M |
|
1977
PUT
Annaly Capital Management
NLY
$16.9B
| $2.82M | ﹤0.01% |
140,400
-41,700
| -23% | -$835K |
|
1978
Rush Street Interactive
RSI
$3.24B
| $2.82M | ﹤0.01% |
+259,660
| New | +$2.51M |
|
|
BRSL
1979
PUT
Brightstar Lottery PLC
BRSL
$1.91B
| $2.81M | ﹤0.01% |
132,200
+39,100
| +42% | +$840K |
|
1980
PUT
Barclays
BCS
$94.1B
| $2.81M | ﹤0.01% |
230,900
-33,700
| -13% | -$395K |
|
|
ITOS
1981
CALL
DELISTED
iTeos Therapeutics
ITOS
| $2.8M | ﹤0.01% |
274,200
+273,500
| +39,071% | +$4.17M |
|
1982
PUT
Flutter Entertainment
FLUT
$17.6B
| $2.8M | ﹤0.01% |
11,800
+11,500
| +3,833% | +$2.39M |
|
1983
CALL
Trustmark
TRMK
$2.73B
| $2.8M | ﹤0.01% |
+87,900
| New | +$2.83M |
|
1984
PUT
FT Vest Gold Strategy Target Income ETF
IGLD
$507M
| $2.79M | ﹤0.01% |
13,200
+3,000
| +29% | +$62.2K |
|
1985
CALL
Aramark
ARMK
$15B
| $2.79M | ﹤0.01% |
72,000
+44,800
| +165% | +$1.58M |
|
1986
PUT
Celanese
CE
$5.09B
| $2.79M | ﹤0.01% |
20,500
+17,700
| +632% | +$2.33M |
|
1987
PUT
Travelers Companies
TRV
$80.8B
| $2.79M | ﹤0.01% |
11,900
-71,400
| -86% | -$15.7M |
|
|
UNIT
1988
PUT
Uniti Group
UNIT
$2.63B
| $2.79M | ﹤0.01% |
493,900
+447,400
| +962% | +$1.91M |
|
1989
PUT
Teladoc Health
TDOC
$1.58B
| $2.78M | ﹤0.01% |
302,400
-20,800
| -6% | -$172K |
|
|
CHGX
1990
PUT
DELISTED
AXS Change Finance ESG ETF
CHGX
| $2.77M | ﹤0.01% |
80,000
+72,400
| +953% | +$2.67M |
|
1991
PUT
ScottsMiracle-Gro
SMG
$4.03B
| $2.77M | ﹤0.01% |
31,900
+900
| +3% | +$63.2K |
|
1992
AMC Entertainment Holdings
AMC
$2.03B
| $2.76M | ﹤0.01% |
606,787
+189,145
| +45% | +$943K |
|
1993
LPL Financial
LPLA
$26.3B
| $2.76M | ﹤0.01% |
+11,867
| New | +$2.67M |
|
1994
CALL
Chemours
CC
$2.59B
| $2.76M | ﹤0.01% |
135,800
+22,700
| +20% | +$464K |
|
|
PPLC
1995
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $2.76M | ﹤0.01% |
46,400
+26,600
| +134% | +$1.58M |
|
1996
CALL
nCino
NCNO
$1.81B
| $2.76M | ﹤0.01% |
87,300
+18,100
| +26% | +$573K |
|
|
GOGL
1997
CALL
DELISTED
Golden Ocean Group
GOGL
| $2.75M | ﹤0.01% |
205,800
+161,000
| +359% | +$2M |
|
1998
PUT
Glaukos
GKOS
$9.02B
| $2.75M | ﹤0.01% |
21,100
+11,500
| +120% | +$1.43M |
|
|
DAY
1999
PUT
DELISTED
Dayforce
DAY
| $2.74M | ﹤0.01% |
44,800
+25,800
| +136% | +$1.42M |
|
2000
PUT
Hormel Foods
HRL
$13.9B
| $2.73M | ﹤0.01% |
86,200
+5,500
| +7% | +$175K |
|
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.