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 | |
|---|---|---|---|---|---|---|
|
TE
4126
CALL
T1 Energy
TE
$1.16B
| $302K | ﹤0.01% |
312,300
+79,600
| +34% | +$109K |
|
|
TXNM
4127
CALL
TXNM Energy Inc
TXNM
$6.43B
| $302K | ﹤0.01% |
6,900
+2,200
| +47% | +$89.4K |
|
4128
Aegon
AEG
$13.6B
| $301K | ﹤0.01% |
47,174
+46,165
| +4,575% | +$286K |
|
4129
PUT
American Well
AMWL
$185M
| $301K | ﹤0.01% |
+31,800
| New | +$269K |
|
4130
PUT
NextDecade
NEXT
$1.63B
| $301K | ﹤0.01% |
64,100
-87,200
| -58% | -$527K |
|
4131
CALL
Columbia Banking Systems
COLB
$8.84B
| $300K | ﹤0.01% |
11,500
+5,400
| +89% | +$129K |
|
4132
Enviri
NVRI
$623M
| $300K | ﹤0.01% |
+29,027
| New | +$306K |
|
|
CNH
4133
CNH Industrial
CNH
$14.2B
| $300K | ﹤0.01% |
27,046
-4,847
| -15% | -$49.4K |
|
4134
CALL
Hubbell
HUBB
$25.6B
| $299K | ﹤0.01% |
700
-4,500
| -87% | -$1.73M |
|
4135
CALL
Liberty Energy
LBRT
$2.89B
| $299K | ﹤0.01% |
15,700
-8,700
| -36% | -$180K |
|
4136
CALL
National Grid
NGG
$81.3B
| $299K | ﹤0.01% |
4,563
+3,183
| +231% | +$195K |
|
4137
PUT
Assurant
AIZ
$14B
| $298K | ﹤0.01% |
1,500
+200
| +15% | +$36.4K |
|
|
ARR
4138
Armour Residential REIT
ARR
$2.32B
| $298K | ﹤0.01% |
+14,620
| New | +$298K |
|
4139
PUT
Federal Realty Investment Trust
FRT
$10.9B
| $298K | ﹤0.01% |
2,600
-2,000
| -43% | -$223K |
|
4140
PUT
Trimble
TRMB
$13.6B
| $298K | ﹤0.01% |
4,800
-1,500
| -24% | -$83.8K |
|
4141
United Natural Foods
UNFI
$3.07B
| $298K | ﹤0.01% |
+17,746
| New | +$254K |
|
4142
Wendy's
WEN
$1.46B
| $298K | ﹤0.01% |
17,037
-26,557
| -61% | -$452K |
|
4143
CALL
Brighthouse Financial
BHF
$3.66B
| $297K | ﹤0.01% |
6,600
+3,700
| +128% | +$166K |
|
4144
PUT
United States Copper Index Fund
CPER
$742M
| $297K | ﹤0.01% |
10,500
-2,800
| -21% | -$74.4K |
|
4145
PUT
Atkore
ATKR
$2.62B
| $296K | ﹤0.01% |
3,500
-10,300
| -75% | -$1.12M |
|
4146
CALL
Cerence
CRNC
$368M
| $296K | ﹤0.01% |
94,000
+37,000
| +65% | +$109K |
|
|
CALY
4147
PUT
Callaway Golf Company
CALY
$3.28B
| $296K | ﹤0.01% |
27,000
+4,200
| +18% | +$52.8K |
|
4148
PUT
Zebra Technologies
ZBRA
$13.5B
| $296K | ﹤0.01% |
800
-900
| -53% | -$302K |
|
4149
PUT
Emergent Biosolutions
EBS
$377M
| $295K | ﹤0.01% |
35,400
-3,800
| -10% | -$34.5K |
|
4150
PUT
Kratos Defense & Security Solutions
KTOS
$9.12B
| $295K | ﹤0.01% |
12,700
-17,100
| -57% | -$370K |
|
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.