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 | |
|---|---|---|---|---|---|---|
6301
CALL
Arcus Biosciences
RCUS
$3.55B
| $32K | ﹤0.01% |
2,100
-21,400
| -91% | -$337K |
|
6302
RLX Technology
RLX
$2.42B
| $32K | ﹤0.01% |
17,691
+13,055
| +282% | +$22.4K |
|
6303
CALL
Riskified
RSKD
$701M
| $32K | ﹤0.01% |
6,800
-6,400
| -48% | -$35K |
|
6304
PUT
Riverview Bancorp
RVSB
$107M
| $32K | ﹤0.01% |
7,000
| – | – |
|
6305
Stoke Therapeutics
STOK
$1.87B
| $32K | ﹤0.01% |
2,638
-2,089
| -44% | -$29.6K |
|
6306
Trevi Therapeutics
TRVI
$2.61B
| $32K | ﹤0.01% |
+9,641
| New | +$28.7K |
|
6307
Vir Biotechnology
VIR
$1.5B
| $32K | ﹤0.01% |
4,273
-13,680
| -76% | -$119K |
|
6308
CALL
Wrap Technologies
WRAP
$98.1M
| $32K | ﹤0.01% |
21,900
-39,600
| -64% | -$64.1K |
|
|
CUTR
6309
DELISTED
Cutera, Inc.
CUTR
| $32K | ﹤0.01% |
40,838
+11,034
| +37% | +$11.4K |
|
6310
Agilon Health
AGL
$1.61B
| $31K | ﹤0.01% |
+324
| New | +$41.8K |
|
6311
ALX Oncology
ALXO
$262M
| $31K | ﹤0.01% |
+17,146
| New | +$63.7K |
|
|
AMWD
6312
DELISTED
American Woodmark
AMWD
| $31K | ﹤0.01% |
+342
| New | +$30.8K |
|
6313
American Well
AMWL
$181M
| $31K | ﹤0.01% |
3,312
+2,537
| +327% | +$21.5K |
|
6314
CALL
Astec Industries
ASTE
$1.18B
| $31K | ﹤0.01% |
1,000
| – | – |
|
|
AUTL
6315
PUT
Autolus Therapeutics
AUTL
$407M
| $31K | ﹤0.01% |
8,600
+8,300
| +2,767% | +$33.1K |
|
6316
Beam Global
BEEM
$23.1M
| $31K | ﹤0.01% |
+6,502
| New | +$35.6K |
|
6317
PUT
BOK Financial
BOKF
$8.57B
| $31K | ﹤0.01% |
+300
| New | +$30.2K |
|
6318
Roundhill Generative AI & Technology ETF
CHAT
$1.7B
| $31K | ﹤0.01% |
854
-1,556
| -65% | -$55.4K |
|
6319
PUT
Clarus
CLAR
$123M
| $31K | ﹤0.01% |
+7,100
| New | +$35.8K |
|
|
CPRX
6320
CALL
DELISTED
Catalyst Pharmaceutical
CPRX
| $31K | ﹤0.01% |
1,600
-1,500
| -48% | -$27.8K |
|
|
CRESY
6321
CALL
Cresud
CRESY
$823M
| $31K | ﹤0.01% |
3,731
-3,530
| -49% | -$28.5K |
|
|
EPIX
6322
DELISTED
ESSA Pharma
EPIX
| $31K | ﹤0.01% |
+5,162
| New | +$28.4K |
|
6323
F&G Annuities & Life
FG
$3.86B
| $31K | ﹤0.01% |
+697
| New | +$28.9K |
|
6324
CALL
iShares S&P GSCI Commodity-Indexed Trust
GSG
$995M
| $31K | ﹤0.01% |
1,500
+500
| +50% | +$10.6K |
|
|
INN
6325
Summit Hotel Properties
INN
$748M
| $31K | ﹤0.01% |
4,580
-4,230
| -48% | -$26.9K |
|
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.