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 | |
|---|---|---|---|---|---|---|
2101
OneSpan
OSPN
$562M
| $2.45M | ﹤0.01% |
+147,087
| New | +$2.18M |
|
2102
CALL
Zimmer Biomet
ZBH
$17.7B
| $2.45M | ﹤0.01% |
22,700
+7,600
| +50% | +$829K |
|
2103
PUT
Carrier Global
CARR
$57.2B
| $2.45M | ﹤0.01% |
30,400
-255,900
| -89% | -$17.8M |
|
2104
CALL
Commault Systems
CVLT
$5.89B
| $2.45M | ﹤0.01% |
15,900
+4,800
| +43% | +$676K |
|
2105
Hims & Hers Health
HIMS
$6.5B
| $2.45M | ﹤0.01% |
+132,806
| New | +$2.38M |
|
2106
PUT
Green Plains
GPRE
$1.19B
| $2.44M | ﹤0.01% |
180,400
+53,400
| +42% | +$782K |
|
2107
CALL
New York Times
NYT
$11.6B
| $2.44M | ﹤0.01% |
43,800
+2,100
| +5% | +$113K |
|
2108
AstraZeneca
AZN
$263B
| $2.44M | ﹤0.01% |
+15,646
| New | +$2.53M |
|
|
ENLC
2109
CALL
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $2.43M | ﹤0.01% |
167,500
+105,900
| +172% | +$1.46M |
|
2110
Diamondback Energy
FANG
$57.6B
| $2.42M | ﹤0.01% |
14,057
-4,217
| -23% | -$812K |
|
2111
CALL
Annaly Capital Management
NLY
$16.9B
| $2.42M | ﹤0.01% |
120,700
-43,700
| -27% | -$875K |
|
2112
PUT
CACI
CACI
$10.8B
| $2.42M | ﹤0.01% |
4,800
| – | – |
|
2113
PUT
ZTO Express
ZTO
$18.2B
| $2.42M | ﹤0.01% |
97,700
-7,000
| -7% | -$145K |
|
2114
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $2.42M | ﹤0.01% |
23,500
-5,800
| -20% | -$589K |
|
2115
PUT
Icahn Enterprises
IEP
$5.17B
| $2.42M | ﹤0.01% |
178,800
+40,900
| +30% | +$618K |
|
2116
PUT
Lemonade
LMND
$4.62B
| $2.41M | ﹤0.01% |
146,400
-35,900
| -20% | -$659K |
|
2117
ArcBest
ARCB
$3.44B
| $2.41M | ﹤0.01% |
22,225
-9,365
| -30% | -$1.03M |
|
|
VISN
2118
CALL
Vistance Networks Inc
VISN
$2.66B
| $2.41M | ﹤0.01% |
394,300
+195,500
| +98% | +$670K |
|
2119
PUT
Old Dominion Freight Line
ODFL
$48.5B
| $2.4M | ﹤0.01% |
12,100
-3,300
| -21% | -$642K |
|
2120
CALL
Penske Automotive Group
PAG
$14.3B
| $2.4M | ﹤0.01% |
14,800
+9,600
| +185% | +$1.53M |
|
2121
PUT
Toronto Dominion Bank
TD
$198B
| $2.4M | ﹤0.01% |
38,000
-41,600
| -52% | -$2.46M |
|
|
SKX
2122
CALL
DELISTED
Skechers
SKX
| $2.4M | ﹤0.01% |
35,900
+1,600
| +5% | +$105K |
|
2123
PUT
Imperial Petroleum
IMPP
$215M
| $2.4M | ﹤0.01% |
578,200
+126,600
| +28% | +$500K |
|
|
GES
2124
PUT
DELISTED
Guess Inc
GES
| $2.4M | ﹤0.01% |
119,100
+9,500
| +9% | +$202K |
|
2125
CALL
Illumina
ILMN
$29.4B
| $2.4M | ﹤0.01% |
73,300
-8,600
| -11% | -$1.06M |
|
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.