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 | |
|---|---|---|---|---|---|---|
3126
Tradeweb Markets
TW
$22.2B
| $669K | ﹤0.01% |
11,875
-13,501
| -53% | -$919K |
|
3127
PUT
Stride
LRN
$4.08B
| $668K | ﹤0.01% |
15,900
+15,400
| +3,080% | +$621K |
|
3128
CALL
TMC The Metals Company
TMC
$1.56B
| $668K | ﹤0.01% |
636,300
+329,000
| +107% | +$317K |
|
|
TGR
3129
PUT
DELISTED
ISHARES TARGET DATE RETIREMENT INCOME ETF
TGR
| $668K | ﹤0.01% |
48,000
-1,000
| -2% | -$13.9K |
|
|
SAFE
3130
CALL
Safehold
SAFE
$1.19B
| $667K | ﹤0.01% |
14,812
-15,182
| -51% | -$1.05M |
|
|
ANSS
3131
CALL
DELISTED
Ansys
ANSS
| $665K | ﹤0.01% |
3,000
+2,100
| +233% | +$537K |
|
3132
PUT
American Resources Corp
AREC
$184M
| $664K | ﹤0.01% |
249,000
-70,200
| -22% | -$172K |
|
3133
Resideo Technologies
REZI
$5.55B
| $664K | ﹤0.01% |
34,878
+11,987
| +52% | +$254K |
|
3134
PUT
CVR Partners
UAN
$1.29B
| $663K | ﹤0.01% |
5,800
+3,300
| +132% | +$377K |
|
|
PRTK
3135
DELISTED
Paratek Pharmaceuticals, Inc.
PRTK
| $663K | ﹤0.01% |
+258,285
| New | +$643K |
|
3136
PUT
Arbor Realty Trust
ABR
$979M
| $662K | ﹤0.01% |
57,600
-109,300
| -65% | -$1.61M |
|
3137
PUT
Pembina Pipeline
PBA
$29B
| $662K | ﹤0.01% |
21,800
-1,500
| -6% | -$53.5K |
|
|
NTR
3138
PUT
DELISTED
NEW YORK MORTGAGE TRUST INC
NTR
| $660K | ﹤0.01% |
282,100
-100
| -0% | -$234 |
|
3139
iPath Bloomberg Commodity Index Total Return ETN due 12 June 2036
DJP
$786M
| $659K | ﹤0.01% |
20,044
-21,541
| -52% | -$754K |
|
3140
PUT
Fair Isaac
FICO
$31B
| $659K | ﹤0.01% |
1,600
-15,000
| -90% | -$6.81M |
|
3141
Direxion Daily CSI China Internet Index Bull 2X ETF
CWEB
$233M
| $658K | ﹤0.01% |
16,867
+689
| +4% | +$37.6K |
|
|
NVTA
3142
DELISTED
Invitae Corporation
NVTA
| $657K | ﹤0.01% |
+267,297
| New | +$811K |
|
3143
Advance Auto Parts
AAP
$3.54B
| $655K | ﹤0.01% |
4,190
-1,031
| -20% | -$188K |
|
3144
CALL
CS Disco
LAW
$270M
| $655K | ﹤0.01% |
65,500
+59,400
| +974% | +$1.08M |
|
|
SOVO
3145
CALL
DELISTED
Sovos Brands, Inc. Common Stock
SOVO
| $655K | ﹤0.01% |
46,000
+40,600
| +752% | +$594K |
|
3146
CALL
ADMA Biologics
ADMA
$2.04B
| $653K | ﹤0.01% |
268,800
+160,200
| +148% | +$384K |
|
3147
Conagra Brands
CAG
$7.38B
| $653K | ﹤0.01% |
20,036
-71,594
| -78% | -$2.46M |
|
3148
PUT
Editas Medicine
EDIT
$402M
| $653K | ﹤0.01% |
53,400
-3,000
| -5% | -$46.7K |
|
|
LDTC
3149
CALL
DELISTED
LeddarTech
LDTC
| $653K | ﹤0.01% |
+131,200
| New | +$650K |
|
3150
SiriusXM
SIRI
$10.7B
| $653K | ﹤0.01% |
+11,451
| New | +$720K |
|
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.