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 | |
|---|---|---|---|---|---|---|
3376
PUT
Vir Biotechnology
VIR
$1.47B
| $543K | ﹤0.01% |
28,200
-4,900
| -15% | -$125K |
|
3377
Caesarstone
CSTE
$70.2M
| $542K | ﹤0.01% |
58,237
+35,342
| +154% | +$340K |
|
3378
CALL
Principal Financial Group
PFG
$24.6B
| $541K | ﹤0.01% |
7,500
+2,200
| +42% | +$158K |
|
3379
CALL
Performance Food Group
PFGC
$18.4B
| $541K | ﹤0.01% |
12,600
+5,000
| +66% | +$247K |
|
3380
CALL
Prospect Capital
PSEC
$1.11B
| $541K | ﹤0.01% |
87,300
-26,200
| -23% | -$196K |
|
|
CYXT
3381
PUT
DELISTED
Cyxtera Technologies, Inc. Class A Common Stock
CYXT
| $541K | ﹤0.01% |
132,800
+111,300
| +518% | +$980K |
|
3382
CALL
Independence Realty Trust
IRT
$3.97B
| $540K | ﹤0.01% |
32,300
+400
| +1% | +$8.09K |
|
|
WCN
3383
CALL
Waste Connections
WCN
$43.7B
| $540K | ﹤0.01% |
4,000
+3,800
| +1,900% | +$518K |
|
|
RDFN
3384
PUT
DELISTED
Redfin
RDFN
| $539K | ﹤0.01% |
92,400
+17,200
| +23% | +$153K |
|
3385
CALL
Universal Corp
UVV
$1.37B
| $538K | ﹤0.01% |
11,700
-1,500
| -11% | -$78.5K |
|
3386
CALL
Weibo
WB
$1.99B
| $538K | ﹤0.01% |
31,500
-13,000
| -29% | -$251K |
|
3387
PUT
MKS Inc
MKSI
$18.4B
| $537K | ﹤0.01% |
6,500
+6,000
| +1,200% | +$618K |
|
3388
CALL
Evergy
EVRG
$19.4B
| $534K | ﹤0.01% |
9,000
+4,900
| +120% | +$330K |
|
3389
Nordic American Tanker
NAT
$1.38B
| $534K | ﹤0.01% |
200,027
+117,772
| +143% | +$313K |
|
3390
CALL
AeroVironment
AVAV
$7.5B
| $533K | ﹤0.01% |
6,400
-10,000
| -61% | -$894K |
|
3391
PUT
Keurig Dr Pepper
KDP
$42.6B
| $533K | ﹤0.01% |
14,900
-15,900
| -52% | -$601K |
|
|
SHOE
3392
PUT
Shoe Station Group
SHOE
$422M
| $533K | ﹤0.01% |
24,900
+16,500
| +196% | +$378K |
|
|
CMBM
3393
CALL
DELISTED
Cambium Networks
CMBM
| $532K | ﹤0.01% |
31,500
+1,300
| +4% | +$23.3K |
|
3394
CALL
Mativ Holdings
MATV
$482M
| $532K | ﹤0.01% |
24,100
+17,800
| +283% | +$407K |
|
3395
PUT
XP
XP
$8.54B
| $532K | ﹤0.01% |
28,000
+8,500
| +44% | +$169K |
|
|
ITCI
3396
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $531K | ﹤0.01% |
+11,431
| New | +$597K |
|
3397
CALL
Nelnet
NNI
$4.93B
| $530K | ﹤0.01% |
+6,700
| New | +$583K |
|
|
TXNM
3398
CALL
TXNM Energy Inc
TXNM
$6.41B
| $530K | ﹤0.01% |
11,600
-30,800
| -73% | -$1.47M |
|
3399
CALL
QuinStreet
QNST
$939M
| $529K | ﹤0.01% |
50,400
+50,100
| +16,700% | +$570K |
|
3400
CALL
Children's Place
PLCE
$55.8M
| $528K | ﹤0.01% |
17,100
+15,200
| +800% | +$639K |
|
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.