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 | |
|---|---|---|---|---|---|---|
3401
PUT
Simply Good Foods
SMPL
$930M
| $527K | ﹤0.01% |
+16,500
| New | +$541K |
|
3402
CALL
Cytek Biosciences
CTKB
$559M
| $526K | ﹤0.01% |
+35,800
| New | +$465K |
|
3403
CALL
Acumen Pharmaceuticals
ABOS
$155M
| $525K | ﹤0.01% |
+52,400
| New | +$301K |
|
3404
State Street SPDR Bloomberg Convertible Securities ETF
CWB
$5.43B
| $525K | ﹤0.01% |
+8,296
| New | +$558K |
|
3405
CALL
Ring Energy
REI
$310M
| $525K | ﹤0.01% |
226,400
+171,900
| +315% | +$469K |
|
3406
Regions Financial
RF
$26.6B
| $525K | ﹤0.01% |
26,197
-27,197
| -51% | -$574K |
|
|
ACCD
3407
CALL
DELISTED
Accolade Inc
ACCD
| $525K | ﹤0.01% |
46,000
+21,000
| +84% | +$229K |
|
3408
CALL
Applied Industrial Technologies
AIT
$12.4B
| $524K | ﹤0.01% |
+5,100
| New | +$524K |
|
3409
CALL
Companhia Siderúrgica Nacional
SID
$1.38B
| $524K | ﹤0.01% |
220,500
-216,300
| -50% | -$597K |
|
3410
PUT
10x Genomics
TXG
$5.81B
| $524K | ﹤0.01% |
18,400
-6,000
| -25% | -$229K |
|
3411
PUT
Fastly Inc
FSLY
$3.19B
| $522K | ﹤0.01% |
57,000
-11,500
| -17% | -$122K |
|
|
MRSH
3412
CALL
Marsh
MRSH
$94.2B
| $522K | ﹤0.01% |
3,500
-28,600
| -89% | -$4.59M |
|
3413
PUT
SSR Mining
SSRM
$5.08B
| $522K | ﹤0.01% |
35,500
+10,000
| +39% | +$151K |
|
3414
PUT
UBS Group
UBS
$170B
| $522K | ﹤0.01% |
36,000
-40,200
| -53% | -$644K |
|
|
CMRC
3415
Commerce.com Inc Series 1
CMRC
$265M
| $521K | ﹤0.01% |
35,259
+23,929
| +211% | +$410K |
|
3416
CALL
Northern Trust
NTRS
$22B
| $521K | ﹤0.01% |
6,100
-24,100
| -80% | -$2.33M |
|
3417
CALL
Alamos Gold
AGI
$11.9B
| $519K | ﹤0.01% |
70,100
+48,800
| +229% | +$361K |
|
|
BCTXW
3418
CALL
DELISTED
BriaCell Therapeutics Corp Warrant
BCTXW
| $519K | ﹤0.01% |
92,400
+17,200
| +23% | +$51.4K |
|
3419
PUT
Dole
DOLE
$1.37B
| $519K | ﹤0.01% |
71,200
+67,100
| +1,637% | +$596K |
|
|
TGH
3420
DELISTED
Textainer Group Holdings limited
TGH
| $519K | ﹤0.01% |
19,350
+4,301
| +29% | +$131K |
|
3421
CALL
Aemetis
AMTX
$101M
| $518K | ﹤0.01% |
84,800
+11,200
| +15% | +$85.2K |
|
3422
CALL
AvePoint
AVPT
$2.74B
| $517K | ﹤0.01% |
129,100
-27,300
| -17% | -$129K |
|
3423
CALL
Cheniere Energy
CQP
$31.7B
| $517K | ﹤0.01% |
9,700
+5,900
| +155% | +$296K |
|
3424
PUT
SIGA Technologies
SIGA
$236M
| $517K | ﹤0.01% |
50,200
+19,100
| +61% | +$307K |
|
3425
PUT
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $516K | ﹤0.01% |
14,400
-8,500
| -37% | -$506K |
|
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.