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 | |
|---|---|---|---|---|---|---|
6451
PUT
Quanterix
QTRX
$164M
| $50K | ﹤0.01% |
4,600
+2,500
| +119% | +$31.8K |
|
6452
RPC Inc
RES
$1.24B
| $50K | ﹤0.01% |
7,335
-6,396
| -47% | -$46.4K |
|
6453
Surgery Partners
SGRY
$2.01B
| $50K | ﹤0.01% |
+2,152
| New | +$68.7K |
|
6454
PUT
SK Telecom
SKM
$12.1B
| $50K | ﹤0.01% |
+2,600
| New | +$56.2K |
|
6455
PUT
Telephone and Data Systems
TDS
$3.82B
| $50K | ﹤0.01% |
3,600
-3,900
| -52% | -$62K |
|
6456
Thermo Fisher Scientific
TMO
$213B
| $50K | ﹤0.01% |
100
| – | – |
|
6457
Toll Brothers
TOL
$13.6B
| $50K | ﹤0.01% |
1,200
| – | – |
|
6458
UGI
UGI
$7.74B
| $50K | ﹤0.01% |
+1,567
| New | +$61.8K |
|
|
CTEV
6459
CALL
Claritev Corp
CTEV
$387M
| $50K | ﹤0.01% |
438
-3,500
| -89% | -$579K |
|
|
ATSG
6460
PUT
DELISTED
Air Transport Services Group
ATSG
| $50K | ﹤0.01% |
2,100
+2,000
| +2,000% | +$58.1K |
|
|
GATO
6461
DELISTED
Gatos Silver, Inc.
GATO
| $50K | ﹤0.01% |
18,728
+7,926
| +73% | +$24.8K |
|
|
NS
6462
DELISTED
NuStar Energy L.P.
NS
| $50K | ﹤0.01% |
3,761
+2,448
| +186% | +$36.8K |
|
|
IRNT
6463
DELISTED
IronNet, Inc.
IRNT
| $50K | ﹤0.01% |
73,998
+9,407
| +15% | +$19.1K |
|
|
BTRS
6464
CALL
DELISTED
BTRS Holdings Inc. Class 1 Common Stock
BTRS
| $50K | ﹤0.01% |
+5,400
| New | +$35K |
|
6465
PUT
American Financial Group
AFG
$11.8B
| $49K | ﹤0.01% |
400
-300
| -43% | -$39.4K |
|
|
ALEX
6466
CALL
DELISTED
Alexander & Baldwin
ALEX
| $49K | ﹤0.01% |
3,000
-700
| -19% | -$12.9K |
|
6467
CALL
Altisource Portfolio Solutions
ASPS
$63.6M
| $49K | ﹤0.01% |
475
+287
| +153% | +$26.6K |
|
6468
BigBear.ai
BBAI
$1.34B
| $49K | ﹤0.01% |
31,504
+26,974
| +595% | +$59.3K |
|
6469
CALL
DNOW Inc
DNOW
$2.58B
| $49K | ﹤0.01% |
4,900
+2,300
| +88% | +$24.9K |
|
6470
National Vision
EYE
$1.77B
| $49K | ﹤0.01% |
1,510
-246
| -14% | -$7.99K |
|
|
FINV
6471
PUT
FinVolution Group
FINV
$1.15B
| $49K | ﹤0.01% |
11,500
-900
| -7% | -$4.08K |
|
6472
PUT
Globe Life
GL
$14.2B
| $49K | ﹤0.01% |
500
-900
| -64% | -$90.3K |
|
|
GPMT
6473
PUT
Granite Point Mortgage Trust
GPMT
$69M
| $49K | ﹤0.01% |
7,700
-16,100
| -68% | -$153K |
|
|
HOUS
6474
PUT
DELISTED
Anywhere Real Estate
HOUS
| $49K | ﹤0.01% |
6,100
-1,400
| -19% | -$14.3K |
|
6475
iShares Gold Trust
IAU
$62.9B
| $49K | ﹤0.01% |
1,579
-2,416
| -60% | -$79.2K |
|
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.