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 | |
|---|---|---|---|---|---|---|
|
MKFG
4226
CALL
DELISTED
Markforged Holding Corporation
MKFG
| $200K | ﹤0.01% |
17,280
+1,260
| +8% | +$19.2K |
|
4227
Aspen Aerogels
ASPN
$339M
| $199K | ﹤0.01% |
16,919
-330
| -2% | -$3.77K |
|
4228
Bath & Body Works
BBWI
$3.97B
| $199K | ﹤0.01% |
4,746
-28,991
| -86% | -$1.08M |
|
4229
Direxion Daily CSI China Internet Index Bull 2X ETF
CWEB
$242M
| $199K | ﹤0.01% |
3,917
-12,950
| -77% | -$507K |
|
|
GRFS
4230
Grifois
GRFS
$5.55B
| $199K | ﹤0.01% |
23,482
+22,347
| +1,969% | +$163K |
|
4231
CALL
Moelis & Co
MC
$4.85B
| $199K | ﹤0.01% |
5,200
-200
| -4% | -$8.12K |
|
4232
PUT
Noble Corp
NE
$6.54B
| $199K | ﹤0.01% |
5,300
+2,900
| +121% | +$103K |
|
4233
Spectrum Brands
SPB
$2.03B
| $199K | ﹤0.01% |
+3,269
| New | +$165K |
|
4234
CALL
EverQuote
EVER
$949M
| $198K | ﹤0.01% |
+13,500
| New | +$127K |
|
4235
PUT
Freshworks
FRSH
$3.21B
| $198K | ﹤0.01% |
13,500
-41,200
| -75% | -$571K |
|
4236
PUT
Performance Food Group
PFGC
$18.3B
| $198K | ﹤0.01% |
3,400
+200
| +6% | +$10.9K |
|
4237
PUT
Tronox
TROX
$967M
| $198K | ﹤0.01% |
14,500
-7,800
| -35% | -$104K |
|
4238
PUT
Upwork
UPWK
$1.18B
| $198K | ﹤0.01% |
19,000
-4,200
| -18% | -$51.8K |
|
|
HZON
4239
PUT
DELISTED
Horizon Acquisition Corporation II
HZON
| $198K | ﹤0.01% |
20,100
-1,200
| -6% | -$11.9K |
|
4240
Ascendis Pharma A/S
ASND
$16.5B
| $197K | ﹤0.01% |
+1,617
| New | +$188K |
|
|
FRMM
4241
PUT
Forum Markets
FRMM
$69.9M
| $197K | ﹤0.01% |
306
+300
| +5,000% | +$450K |
|
4242
Global X Robotics & Artificial Intelligence ETF
BOTZ
$3.14B
| $197K | ﹤0.01% |
9,598
+8,825
| +1,142% | +$178K |
|
4243
PUT
InterDigital
IDCC
$6.75B
| $197K | ﹤0.01% |
4,000
+800
| +25% | +$39K |
|
4244
PUT
Iovance Biotherapeutics
IOVA
$2.04B
| $197K | ﹤0.01% |
30,900
+26,200
| +557% | +$205K |
|
4245
CALL
Timken Company
TKR
$9.19B
| $197K | ﹤0.01% |
2,800
+100
| +4% | +$6.99K |
|
4246
PUT
Vanguard FTSE Developed Markets ETF
VEA
$223B
| $197K | ﹤0.01% |
4,700
-6,400
| -58% | -$259K |
|
4247
CALL
Black Hills Corp
BKH
$5.55B
| $196K | ﹤0.01% |
2,800
-500
| -15% | -$33.6K |
|
4248
Donnelley Financial Solutions
DFIN
$1.28B
| $196K | ﹤0.01% |
5,084
+5,012
| +6,961% | +$188K |
|
4249
PUT
Equinox Gold
EQX
$7.07B
| $196K | ﹤0.01% |
59,800
-400
| -0.7% | -$1.38K |
|
4250
CALL
Genworth Financial
GNW
$3.86B
| $196K | ﹤0.01% |
37,200
-55,100
| -60% | -$259K |
|
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.