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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
8476
Albany International
AIN
$2.16B
| $7K | ﹤0.01% |
+100
| New | +$8.6K |
|
8477
PUT
a.k.a. Brands
AKA
$119M
| $7K | ﹤0.01% |
425
+375
| +750% | +$9.65K |
|
|
ASA
8478
CALL
ASA Gold and Precious Metals
ASA
$941M
| $7K | ﹤0.01% |
600
-1,200
| -67% | -$16.9K |
|
8479
PUT
Anterix
ATEX
$1.78B
| $7K | ﹤0.01% |
200
-100
| -33% | -$4.15K |
|
8480
PUT
ATN International
ATNI
$370M
| $7K | ﹤0.01% |
+200
| New | +$9.06K |
|
|
FABC
8481
Fabric.AI Inc
FABC
$16.5M
| $7K | ﹤0.01% |
99
-108
| -52% | -$12.3K |
|
|
AZEK
8482
DELISTED
The AZEK Co
AZEK
| $7K | ﹤0.01% |
458
-7,758
| -94% | -$148K |
|
8483
CALL
AZZ Inc
AZZ
$4.41B
| $7K | ﹤0.01% |
200
-2,300
| -92% | -$95.9K |
|
8484
BridgeBio Pharma
BBIO
$16.8B
| $7K | ﹤0.01% |
705
-42,530
| -98% | -$442K |
|
|
BCIM
8485
PUT
DELISTED
abrdn Bloomberg Industrial Metals Strategy K-1 Free ETF
BCIM
| $7K | ﹤0.01% |
300
-400
| -57% | -$9.06K |
|
8486
CALL
BGSF Inc
BGSF
$56.6M
| $7K | ﹤0.01% |
700
+100
| +17% | +$1.24K |
|
8487
PUT
Smartbird Inc
BIRD
$21M
| $7K | ﹤0.01% |
125
-1,525
| -92% | -$135K |
|
8488
Biomerica
BMRA
$4.94M
| $7K | ﹤0.01% |
243
-833
| -77% | -$21.6K |
|
8489
PUT
Popular Inc
BPOP
$11.1B
| $7K | ﹤0.01% |
100
-5,500
| -98% | -$428K |
|
8490
PUT
BuzzFeed
BZFD
$104M
| $7K | ﹤0.01% |
1,275
-7,850
| -86% | -$54K |
|
8491
PUT
China Automotive Systems
CAAS
$131M
| $7K | ﹤0.01% |
1,900
+1,100
| +138% | +$3.82K |
|
8492
CALL
CalciMedica
CALC
$11.3M
| $7K | ﹤0.01% |
579
+93
| +19% | +$1.32K |
|
8493
CALL
Clear Channel Outdoor Holdings
CCO
$1.23B
| $7K | ﹤0.01% |
+5,200
| New | +$7.86K |
|
8494
CALL
Cadiz
CDZI
$259M
| $7K | ﹤0.01% |
3,700
-4,500
| -55% | -$15.1K |
|
8495
CALL
Cullinan Oncology
CGEM
$1.07B
| $7K | ﹤0.01% |
600
| – | – |
|
8496
Celestica
CLS
$40.3B
| $7K | ﹤0.01% |
950
-340
| -26% | -$3.44K |
|
8497
CALL
Compass Minerals
CMP
$1.25B
| $7K | ﹤0.01% |
200
-100
| -33% | -$3.81K |
|
|
8498
PUT
Compass Minerals
CMP
$1.25B
| $7K | ﹤0.01% |
200
-400
| -67% | -$15.3K |
|
8499
Core & Main
CNM
$8.23B
| $7K | ﹤0.01% |
+346
| New | +$8.09K |
|
8500
Century Casinos
CNTY
$32.6M
| $7K | ﹤0.01% |
+1,083
| New | +$8.35K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.