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 | |
|---|---|---|---|---|---|---|
|
AVID
4501
CALL
DELISTED
Avid Technology Inc
AVID
| $218K | ﹤0.01% |
9,400
+9,200
| +4,600% | +$240K |
|
|
CSII
4502
PUT
DELISTED
Cardiovascular Systems, Inc.
CSII
| $218K | ﹤0.01% |
+15,800
| New | +$235K |
|
|
AVCT
4503
PUT
DELISTED
American Virtual Cloud Technologies, Inc. Common Stock
AVCT
| $218K | ﹤0.01% |
23,373
+21,846
| +1,431% | +$75K |
|
4504
CALL
Westlake Corp
WLK
$9.03B
| $217K | ﹤0.01% |
2,500
-200
| -7% | -$19.2K |
|
4505
iShares Core MSCI Emerging Markets ETF
IEMG
$150B
| $216K | ﹤0.01% |
5,037
+3,641
| +261% | +$175K |
|
4506
PUT
Independent Bank
INDB
$3.99B
| $216K | ﹤0.01% |
+2,900
| New | +$234K |
|
4507
CALL
PDS Biotechnology
PDSB
$38.4M
| $216K | ﹤0.01% |
72,800
+5,800
| +9% | +$24.6K |
|
|
AIV
4508
CALL
Aimco
AIV
$387M
| $215K | ﹤0.01% |
29,500
-2,700
| -8% | -$22.1K |
|
4509
Global X Cybersecurity ETF
BUG
$1.28B
| $215K | ﹤0.01% |
+8,973
| New | +$237K |
|
4510
PUT
Coeur Mining
CDE
$15.4B
| $215K | ﹤0.01% |
63,100
-9,700
| -13% | -$28.8K |
|
4511
CALL
Flywire
FLYW
$1.98B
| $215K | ﹤0.01% |
9,400
+800
| +9% | +$19.1K |
|
4512
Zymeworks
ZYME
$1.61B
| $215K | ﹤0.01% |
35,070
-17,288
| -33% | -$104K |
|
|
AVTA
4513
DELISTED
Avantax, Inc. Common Stock
AVTA
| $215K | ﹤0.01% |
11,163
-29,105
| -72% | -$585K |
|
4514
PUT
Artivion
AORT
$1.3B
| $214K | ﹤0.01% |
+15,500
| New | +$312K |
|
4515
PUT
Boise Cascade
BCC
$2.69B
| $214K | ﹤0.01% |
3,600
+2,000
| +125% | +$129K |
|
|
FITB
4516
Fifth Third Bancorp
FITB
$51.2B
| $214K | ﹤0.01% |
+6,708
| New | +$231K |
|
4517
PUT
Comfort Systems
FIX
$60.9B
| $214K | ﹤0.01% |
2,200
+2,000
| +1,000% | +$196K |
|
|
HBI
4518
DELISTED
Hanesbrands
HBI
| $214K | ﹤0.01% |
+30,764
| New | +$302K |
|
4519
PUT
MarineMax
HZO
$759M
| $214K | ﹤0.01% |
7,200
-36,900
| -84% | -$1.38M |
|
4520
PUT
Sally Beauty Holdings
SBH
$1.43B
| $214K | ﹤0.01% |
17,000
+6,700
| +65% | +$93K |
|
4521
PUT
Energy Fuels
UUUU
$2.86B
| $214K | ﹤0.01% |
35,100
-81,400
| -70% | -$520K |
|
4522
CALL
Century Communities
CCS
$1.91B
| $213K | ﹤0.01% |
5,000
-4,600
| -48% | -$223K |
|
4523
Ocular Therapeutix
OCUL
$1.79B
| $213K | ﹤0.01% |
51,385
+30,108
| +142% | +$152K |
|
|
VLD
4524
DELISTED
Velo3D, Inc.
VLD
| $213K | ﹤0.01% |
1,547
+1,145
| +285% | +$149K |
|
|
DOOR
4525
CALL
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $213K | ﹤0.01% |
3,000
+2,900
| +2,900% | +$241K |
|
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.