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 | |
|---|---|---|---|---|---|---|
4701
PUT
Verra Mobility
VRRM
$775M
| $136K | ﹤0.01% |
9,900
+9,500
| +2,375% | +$144K |
|
|
WSR
4702
DELISTED
Whitestone REIT
WSR
| $136K | ﹤0.01% |
14,195
-8,272
| -37% | -$76.1K |
|
|
XXII
4703
22nd Century Group
XXII
$1.28M
| – | – |
0
| – | – |
|
|
ASAP
4704
CALL
DELISTED
Waitr Holdings Inc. Common Stock
ASAP
| $136K | ﹤0.01% |
391,200
+371,715
| +1,908% | +$694K |
|
4705
CALL
BlackSky Technology
BKSY
$843M
| $135K | ﹤0.01% |
11,038
+4,200
| +61% | +$55.9K |
|
4706
e.l.f. Beauty
ELF
$4.77B
| $135K | ﹤0.01% |
+2,454
| New | +$120K |
|
4707
CALL
Goldman Sachs BDC
GSBD
$997M
| $135K | ﹤0.01% |
9,900
-8,400
| -46% | -$126K |
|
4708
CALL
Gyre Therapeutics
GYRE
$629M
| $135K | ﹤0.01% |
34,347
-23,680
| -41% | -$96.6K |
|
|
MITT
4709
TPG Mortgage Investment Trust
MITT
$228M
| $135K | ﹤0.01% |
25,571
-7,249
| -22% | -$37.4K |
|
4710
CALL
Protolabs
PRLB
$1.7B
| $135K | ﹤0.01% |
5,300
-5,400
| -50% | -$160K |
|
4711
CALL
The RealReal
REAL
$1.41B
| $135K | ﹤0.01% |
108,200
+29,900
| +38% | +$43K |
|
4712
CALL
abrdn Physical Silver Shares ETF
SIVR
$3.98B
| $135K | ﹤0.01% |
5,900
-6,600
| -53% | -$135K |
|
4713
PUT
SoundHound AI
SOUN
$2.48B
| $135K | ﹤0.01% |
76,400
+62,800
| +462% | +$131K |
|
|
CTIC
4714
DELISTED
CTI BioPharma Corp. (DE) Common Stock
CTIC
| $135K | ﹤0.01% |
22,489
-17,882
| -44% | -$97.6K |
|
4715
CALL
Agree Realty
ADC
$9.66B
| $134K | ﹤0.01% |
1,900
-7,300
| -79% | -$501K |
|
4716
PUT
Cirrus Logic
CRUS
$6.76B
| $134K | ﹤0.01% |
1,800
-700
| -28% | -$50.4K |
|
4717
CALL
Graco
GGG
$13.2B
| $134K | ﹤0.01% |
2,000
-500
| -20% | -$33.3K |
|
|
JHG
4718
CALL
DELISTED
Janus Henderson
JHG
| $134K | ﹤0.01% |
5,700
+3,100
| +119% | +$72.7K |
|
4719
CALL
NewtekOne
NEWT
$426M
| $134K | ﹤0.01% |
8,300
-13,200
| -61% | -$219K |
|
4720
PUT
Smith & Nephew
SNN
$13.7B
| $134K | ﹤0.01% |
5,000
-39,600
| -89% | -$994K |
|
4721
Steris
STE
$22.9B
| $134K | ﹤0.01% |
+727
| New | +$128K |
|
4722
Vanguard Total International Stock ETF
VXUS
$151B
| $134K | ﹤0.01% |
+2,600
| New | +$130K |
|
|
ENZ
4723
PUT
DELISTED
Enzo Biochem, Inc.
ENZ
| $134K | ﹤0.01% |
94,300
+28,100
| +42% | +$54.8K |
|
|
DICE
4724
CALL
DELISTED
DICE Therapeutics, Inc. Common Stock
DICE
| $134K | ﹤0.01% |
4,300
-48,200
| -92% | -$1.57M |
|
4725
Global X US Preferred ETF
PFFD
$2.13B
| $133K | ﹤0.01% |
6,894
+4,906
| +247% | +$97.9K |
|
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.