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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3676
CALL
Sun Communities
SUI
$15.3B
| $314K | ﹤0.01% |
2,200
+1,800
| +450% | +$246K |
|
3677
CALL
Vanguard FTSE Developed Markets ETF
VEA
$225B
| $314K | ﹤0.01% |
7,500
-2,800
| -27% | -$113K |
|
3678
PUT
Shift4
FOUR
$4.35B
| $313K | ﹤0.01% |
5,600
-13,000
| -70% | -$615K |
|
3679
CALL
IonQ
IONQ
$12.6B
| $313K | ﹤0.01% |
90,900
-30,300
| -25% | -$146K |
|
3680
ArcBest
ARCB
$3.33B
| $312K | ﹤0.01% |
4,460
+4,262
| +2,153% | +$329K |
|
3681
PUT
Aurinia Pharmaceuticals
AUPH
$1.92B
| $312K | ﹤0.01% |
72,300
+36,700
| +103% | +$213K |
|
3682
FirstEnergy
FE
$28.7B
| $312K | ﹤0.01% |
+7,452
| New | +$291K |
|
3683
PUT
Kforce
KFRC
$1.04B
| $312K | ﹤0.01% |
+5,700
| New | +$329K |
|
|
BINI
3684
CALL
DELISTED
Bollinger Innovations
BINI
| – | – |
0
| – | – |
|
3685
PUT
Rapid7
RPD
$642M
| $312K | ﹤0.01% |
9,200
+8,000
| +667% | +$286K |
|
3686
Bio-Rad Laboratories Class A
BIO
$8.86B
| $311K | ﹤0.01% |
741
-1,401
| -65% | -$565K |
|
3687
CALL
Consensus Cloud Solutions
CCSI
$683M
| $311K | ﹤0.01% |
5,800
-3,200
| -36% | -$174K |
|
3688
i3 Verticals
IIIV
$420M
| $311K | ﹤0.01% |
12,798
+146
| +1% | +$3.29K |
|
3689
Sturm, Ruger & Co
RGR
$611M
| $311K | ﹤0.01% |
+6,149
| New | +$334K |
|
3690
Equity Lifestyle Properties
ELS
$12.8B
| $310K | ﹤0.01% |
+4,813
| New | +$305K |
|
3691
PUT
International Seaways
INSW
$4.63B
| $310K | ﹤0.01% |
+8,400
| New | +$340K |
|
|
MASI
3692
CALL
DELISTED
Masimo
MASI
| $310K | ﹤0.01% |
2,100
+1,500
| +250% | +$206K |
|
3693
PUT
Root
ROOT
$972M
| $310K | ﹤0.01% |
69,200
-152,800
| -69% | -$1.05M |
|
3694
CALL
Sigma Lithium
SGML
$1.06B
| $310K | ﹤0.01% |
11,000
-7,300
| -40% | -$235K |
|
3695
CALL
Angi Inc
ANGI
$252M
| $309K | ﹤0.01% |
13,180
+4,310
| +49% | +$96.4K |
|
3696
PUT
American Resources Corp
AREC
$184M
| $309K | ﹤0.01% |
234,700
-14,300
| -6% | -$26.1K |
|
3697
Fresenius Medical Care
FMS
$13.3B
| $309K | ﹤0.01% |
+18,929
| New | +$281K |
|
3698
PUT
Kayne Anderson Energy Infrastructure Fund
KYN
$2.43B
| $309K | ﹤0.01% |
36,100
+700
| +2% | +$6.07K |
|
|
JOYY
3699
CALL
JOYY Inc
JOYY
$3.77B
| $309K | ﹤0.01% |
9,800
-12,800
| -57% | -$370K |
|
|
QUOT
3700
PUT
DELISTED
Quotient Technology Inc
QUOT
| $309K | ﹤0.01% |
90,300
-165,100
| -65% | -$467K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.