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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5326
Canadian National Railway
CNI
$76.9B
| $80K | ﹤0.01% |
+677
| New | +$80.9K |
|
|
DAO
5327
Youdao
DAO
$1.97B
| $80K | ﹤0.01% |
14,940
+13,773
| +1,180% | +$59.7K |
|
5328
PUT
Fortis
FTS
$29.3B
| $80K | ﹤0.01% |
2,000
-1,100
| -35% | -$43.1K |
|
5329
PUT
Gladstone Investment Corp
GAIN
$646M
| $80K | ﹤0.01% |
6,200
+3,500
| +130% | +$46.2K |
|
5330
CALL
Monte Rosa Therapeutics
GLUE
$1.92B
| $80K | ﹤0.01% |
+10,600
| New | +$88.3K |
|
5331
PUT
Gold Royalty Corp
GROY
$621M
| $80K | ﹤0.01% |
34,700
+9,900
| +40% | +$24.7K |
|
5332
CALL
TFI International
TFII
$11B
| $80K | ﹤0.01% |
800
-100
| -11% | -$9.98K |
|
5333
PUT
TPG
TPG
$6.85B
| $80K | ﹤0.01% |
2,900
+2,300
| +383% | +$72.4K |
|
|
TSVT
5334
PUT
DELISTED
2seventy bio
TSVT
| $80K | ﹤0.01% |
8,600
+8,500
| +8,500% | +$120K |
|
5335
CALL
Upland Software
UPLD
$13.6M
| $80K | ﹤0.01% |
1,130
-4,880
| -81% | -$364K |
|
5336
PUT
UWM Holdings
UWMC
$631M
| $80K | ﹤0.01% |
24,300
-20,700
| -46% | -$77.6K |
|
|
CMBT
5337
CALL
CMB.TECH NV
CMBT
$4.65B
| $80K | ﹤0.01% |
4,700
-14,800
| -76% | -$267K |
|
|
DOOR
5338
PUT
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $80K | ﹤0.01% |
1,000
+700
| +233% | +$51.7K |
|
|
APPH
5339
PUT
DELISTED
AppHarvest, Inc. Common Stock
APPH
| $80K | ﹤0.01% |
141,800
+103,800
| +273% | +$135K |
|
5340
CALL
Alpha and Omega Semiconductor
AOSL
$931M
| $79K | ﹤0.01% |
2,800
-16,000
| -85% | -$518K |
|
5341
Astec Industries
ASTE
$1.18B
| $79K | ﹤0.01% |
+1,944
| New | +$78.5K |
|
5342
PUT
ClearPoint Neuro
CLPT
$437M
| $79K | ﹤0.01% |
9,400
-5,000
| -35% | -$47.4K |
|
5343
Cohu
COHU
$2.19B
| $79K | ﹤0.01% |
+2,474
| New | +$80.1K |
|
5344
Direxion Daily Regional Banks Bull 3X ETF
DPST
$460M
| $79K | ﹤0.01% |
352
+276
| +363% | +$73.2K |
|
5345
Globe Life
GL
$14.2B
| $79K | ﹤0.01% |
+658
| New | +$75.3K |
|
5346
Global Ship Lease
GSL
$1.6B
| $79K | ﹤0.01% |
+4,774
| New | +$82.1K |
|
5347
HUB Group
HUBG
$2.78B
| $79K | ﹤0.01% |
+1,990
| New | +$77.7K |
|
5348
CALL
Jones Lang LaSalle
JLL
$16.8B
| $79K | ﹤0.01% |
500
+100
| +25% | +$15.9K |
|
5349
CALL
Kura Oncology
KURA
$826M
| $79K | ﹤0.01% |
6,400
-12,900
| -67% | -$188K |
|
|
NSA
5350
CALL
DELISTED
National Storage Affiliates Trust
NSA
| $79K | ﹤0.01% |
2,200
+1,100
| +100% | +$43K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.