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 | |
|---|---|---|---|---|---|---|
6401
CALL
Adtran
ADTN
$689M
| $31K | ﹤0.01% |
1,700
-1,600
| -48% | -$32.1K |
|
6402
Adecoagro
AGRO
$1.44B
| $31K | ﹤0.01% |
3,806
-5,102
| -57% | -$41.8K |
|
6403
Corebridge Financial
CRBG
$14.1B
| $31K | ﹤0.01% |
+1,576
| New | +$33.3K |
|
6404
Direxion Daily Healthcare Bull 3X ETF
CURE
$178M
| $31K | ﹤0.01% |
+276
| New | +$29.9K |
|
6405
CALL
Dole
DOLE
$1.35B
| $31K | ﹤0.01% |
3,300
-3,000
| -48% | -$27.3K |
|
6406
CALL
GrafTech
EAF
$175M
| $31K | ﹤0.01% |
670
-2,120
| -76% | -$103K |
|
6407
Enlivex Ltd
ENLV
$35.2M
| $31K | ﹤0.01% |
544
+202
| +59% | +$13K |
|
6408
EXL Service
EXLS
$5.14B
| $31K | ﹤0.01% |
940
-13,255
| -93% | -$461K |
|
6409
CALL
4D Molecular Therapeutics
FDMT
$532M
| $31K | ﹤0.01% |
1,400
-3,700
| -73% | -$57.1K |
|
6410
Health Catalyst
HCAT
$154M
| $31K | ﹤0.01% |
2,932
-18,274
| -86% | -$176K |
|
6411
CALL
Janus International
JBI
$700M
| $31K | ﹤0.01% |
3,300
-7,200
| -69% | -$69.5K |
|
6412
CALL
KT
KT
$8.62B
| $31K | ﹤0.01% |
2,300
-900
| -28% | -$12K |
|
|
LOVE
6413
DELISTED
LoveSac
LOVE
| $31K | ﹤0.01% |
+1,446
| New | +$32.4K |
|
6414
PUT
Malibu Boats
MBUU
$541M
| $31K | ﹤0.01% |
600
-7,600
| -93% | -$408K |
|
6415
CALL
MGP Ingredients
MGPI
$379M
| $31K | ﹤0.01% |
300
| – | – |
|
6416
PUT
Mitek Systems
MITK
$754M
| $31K | ﹤0.01% |
3,200
+2,600
| +433% | +$27.4K |
|
6417
PUT
MACOM Technology Solutions
MTSI
$19.2B
| $31K | ﹤0.01% |
500
-4,700
| -90% | -$293K |
|
6418
Mitsubishi UFJ Financial
MUFG
$253B
| $31K | ﹤0.01% |
4,656
-1,830
| -28% | -$9.47K |
|
|
NTST
6419
CALL
NETSTREIT Corp
NTST
$2.09B
| $31K | ﹤0.01% |
1,700
+100
| +6% | +$1.87K |
|
6420
CALL
Oaktree Specialty Lending
OCSL
$1.02B
| $31K | ﹤0.01% |
1,533
+133
| +10% | +$2.68K |
|
6421
PUT
Omeros
OMER
$857M
| $31K | ﹤0.01% |
13,800
-63,800
| -82% | -$176K |
|
6422
PUT
Porch Group
PRCH
$1.64B
| $31K | ﹤0.01% |
16,700
-2,400
| -13% | -$4.24K |
|
6423
Invesco S&P SmallCap Energy ETF
PSCE
$98.6M
| $31K | ﹤0.01% |
613
-1,988
| -76% | -$103K |
|
6424
CALL
First Trust NASDAQ-100 Technology Index Fund
QTEC
$4.52B
| $31K | ﹤0.01% |
300
| – | – |
|
|
RVPH
6425
CALL
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $31K | ﹤0.01% |
365
-765
| -68% | -$58.3K |
|
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.