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 | |
|---|---|---|---|---|---|---|
6626
CALL
Dorchester Minerals
DMLP
$1.3B
| $21K | ﹤0.01% |
700
-900
| -56% | -$27.6K |
|
6627
CALL
ESAB
ESAB
$5.37B
| $21K | ﹤0.01% |
+200
| New | +$19.8K |
|
6628
CALL
Fennec Pharmaceuticals
FENC
$335M
| $21K | ﹤0.01% |
4,200
+3,900
| +1,300% | +$22.6K |
|
6629
CALL
First Trust Water ETF
FIW
$1.87B
| $21K | ﹤0.01% |
200
| – | – |
|
6630
Fox Factory Holding Corp
FOXF
$794M
| $21K | ﹤0.01% |
+512
| New | +$22.2K |
|
6631
Flotek Industries
FTK
$789M
| $21K | ﹤0.01% |
+4,268
| New | +$19.4K |
|
6632
CALL
Invesco CurrencyShares Canadian Dollar Trust
FXC
$73M
| $21K | ﹤0.01% |
+300
| New | +$21.5K |
|
6633
PUT
Hamilton Insurance Group
HG
$3.63B
| $21K | ﹤0.01% |
1,100
+100
| +10% | +$1.79K |
|
6634
CALL
Home BancShares
HOMB
$6.3B
| $21K | ﹤0.01% |
800
-25,900
| -97% | -$689K |
|
6635
IDEX
IEX
$17B
| $21K | ﹤0.01% |
+98
| New | +$19.8K |
|
6636
CALL
iHeartMedia
IHRT
$531M
| $21K | ﹤0.01% |
11,400
+10,200
| +850% | +$15.2K |
|
6637
Kopin
KOPN
$586M
| $21K | ﹤0.01% |
29,778
+15,583
| +110% | +$14.3K |
|
6638
Kratos Defense & Security Solutions
KTOS
$8.23B
| $21K | ﹤0.01% |
+930
| New | +$20.1K |
|
6639
Myomo
MYO
$35.9M
| $21K | ﹤0.01% |
5,441
+844
| +18% | +$3.49K |
|
6640
PUT
National Bank Holdings
NBHC
$1.9B
| $21K | ﹤0.01% |
500
+100
| +25% | +$4.16K |
|
6641
PUT
Ocugen
OCGN
$403M
| $21K | ﹤0.01% |
21,400
-1,800
| -8% | -$2.47K |
|
6642
PUT
Outlook Therapeutics
OTLK
$187M
| $21K | ﹤0.01% |
4,100
+3,100
| +310% | +$22.7K |
|
|
PINE
6643
PUT
Alpine Income Property Trust
PINE
$336M
| $21K | ﹤0.01% |
1,200
+100
| +9% | +$1.74K |
|
6644
CALL
SLR Investment Corp
SLRC
$704M
| $21K | ﹤0.01% |
1,400
+800
| +133% | +$12.4K |
|
6645
PUT
Suburban Propane Partners
SPH
$1.21B
| $21K | ﹤0.01% |
1,200
-200
| -14% | -$3.61K |
|
|
STKL
6646
CALL
DELISTED
SunOpta
STKL
| $21K | ﹤0.01% |
3,300
-12,100
| -79% | -$70.9K |
|
6647
PUT
Telos
TLS
$331M
| $21K | ﹤0.01% |
6,000
+4,400
| +275% | +$15.7K |
|
6648
CALL
UroGen Pharma
URGN
$1.97B
| $21K | ﹤0.01% |
1,700
-11,300
| -87% | -$168K |
|
6649
PUT
Vuzix
VUZI
$178M
| $21K | ﹤0.01% |
18,500
-5,200
| -22% | -$5.67K |
|
6650
PUT
Warner Music
WMG
$15.2B
| $21K | ﹤0.01% |
700
-8,800
| -93% | -$261K |
|
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.