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 | |
|---|---|---|---|---|---|---|
5501
CALL
Immunocore
IMCR
$1.72B
| $68K | ﹤0.01% |
1,200
+100
| +9% | +$5.63K |
|
5502
PUT
Karyopharm Therapeutics
KPTI
$41.9M
| $68K | ﹤0.01% |
1,347
+340
| +34% | +$23.6K |
|
5503
CALL
Lipocine
LPCN
$17.6M
| $68K | ﹤0.01% |
10,182
+1,835
| +22% | +$13.4K |
|
5504
CALL
Dorian LPG
LPG
$1.99B
| $68K | ﹤0.01% |
3,600
+600
| +20% | +$10.7K |
|
|
LL
5505
CALL
DELISTED
LL Flooring Holdings, Inc.
LL
| $68K | ﹤0.01% |
12,100
-12,500
| -51% | -$87.6K |
|
5506
PUT
Algonquin Power & Utilities
AQN
$4.53B
| $67K | ﹤0.01% |
10,300
-1,000
| -9% | -$8.92K |
|
|
BZUN
5507
PUT
Baozun
BZUN
$167M
| $67K | ﹤0.01% |
12,800
+3,700
| +41% | +$17.7K |
|
5508
Pathward Financial
CASH
$1.86B
| $67K | ﹤0.01% |
+1,578
| New | +$64.7K |
|
5509
CALL
Definitive Healthcare
DH
$72.6M
| $67K | ﹤0.01% |
6,100
+5,900
| +2,950% | +$75.8K |
|
|
PPLI
5510
People Inc
PPLI
$3.08B
| $67K | ﹤0.01% |
1,852
-170
| -8% | -$6.72K |
|
5511
Liquidia Corp
LQDA
$7.63B
| $67K | ﹤0.01% |
+10,543
| New | +$56.7K |
|
|
RAPT
5512
CALL
DELISTED
RAPT Therapeutics
RAPT
| $67K | ﹤0.01% |
425
-100
| -19% | -$16K |
|
5513
CALL
Titan Machinery
TITN
$403M
| $67K | ﹤0.01% |
1,700
-2,000
| -54% | -$71K |
|
5514
PUT
Vital Farms
VITL
$547M
| $67K | ﹤0.01% |
4,500
-11,700
| -72% | -$161K |
|
5515
PUT
Energous
WATT
$77.8M
| $67K | ﹤0.01% |
134
-36
| -21% | -$21.7K |
|
|
DNMR
5516
PUT
DELISTED
Danimer Scientific, Inc.
DNMR
| $67K | ﹤0.01% |
943
+263
| +39% | +$24.9K |
|
|
VCSA
5517
PUT
DELISTED
Vacasa, Inc. Class A Common Stock
VCSA
| $67K | ﹤0.01% |
2,695
+2,080
| +338% | +$97K |
|
|
BKI
5518
CALL
DELISTED
Black Knight, Inc. Common Stock
BKI
| $67K | ﹤0.01% |
1,100
+400
| +57% | +$24.3K |
|
5519
American Well
AMWL
$180M
| $66K | ﹤0.01% |
1,167
-37
| -3% | -$2.67K |
|
5520
Arcturus Therapeutics
ARCT
$163M
| $66K | ﹤0.01% |
3,945
+3,074
| +353% | +$53.6K |
|
5521
PUT
Banco Bilbao Vizcaya Argentaria
BBVA
$154B
| $66K | ﹤0.01% |
11,000
-1,000
| -8% | -$5.4K |
|
|
BZUN
5522
Baozun
BZUN
$167M
| $66K | ﹤0.01% |
+12,525
| New | +$59.9K |
|
|
CODX
5523
Co-Diagnostics
CODX
$5.53M
| $66K | ﹤0.01% |
874
+323
| +59% | +$30.2K |
|
|
GBIO
5524
CALL
DELISTED
Generation Bio
GBIO
| $66K | ﹤0.01% |
1,700
| – | – |
|
|
GTLS
5525
DELISTED
Chart Industries
GTLS
| $66K | ﹤0.01% |
+580
| New | +$93.2K |
|
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.