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 | |
|---|---|---|---|---|---|---|
4501
MannKind Corp
MNKD
$1.19B
| $160K | ﹤0.01% |
30,377
-85,560
| -74% | -$350K |
|
|
NOTV
4502
CALL
DELISTED
Inotiv
NOTV
| $160K | ﹤0.01% |
32,500
-1,100
| -3% | -$13.7K |
|
4503
SurgePays
SURG
$5.9M
| $160K | ﹤0.01% |
24,467
+3,265
| +15% | +$19.7K |
|
4504
CALL
Upbound Group
UPBD
$1.22B
| $160K | ﹤0.01% |
7,100
-60,300
| -89% | -$1.29M |
|
4505
PUT
Build-A-Bear
BBW
$445M
| $159K | ﹤0.01% |
6,700
+1,100
| +20% | +$21.2K |
|
|
CHX
4506
CALL
DELISTED
ChampionX
CHX
| $159K | ﹤0.01% |
5,500
-56,600
| -91% | -$1.56M |
|
4507
CALL
Compass Minerals
CMP
$1.23B
| $159K | ﹤0.01% |
3,900
+3,700
| +1,850% | +$153K |
|
4508
1stdibs.com
DIBS
$148M
| $159K | ﹤0.01% |
+31,410
| New | +$189K |
|
4509
CALL
Domo
DOMO
$171M
| $159K | ﹤0.01% |
11,200
-3,100
| -22% | -$48.1K |
|
4510
PUT
FirstEnergy
FE
$28.4B
| $159K | ﹤0.01% |
3,800
-1,400
| -27% | -$54.7K |
|
4511
PUT
Green Brick Partners
GRBK
$3.09B
| $159K | ﹤0.01% |
6,600
+400
| +6% | +$9.25K |
|
4512
Mativ Holdings
MATV
$479M
| $159K | ﹤0.01% |
+7,613
| New | +$165K |
|
4513
Amplify Alternative Harvest ETF
MJ
$96.9M
| $159K | ﹤0.01% |
3,117
-1,012
| -25% | -$62.6K |
|
4514
PUT
Public Service Enterprise Group
PEG
$38.7B
| $159K | ﹤0.01% |
2,600
-21,000
| -89% | -$1.22M |
|
4515
CALL
Affiliated Managers Group
AMG
$9.51B
| $158K | ﹤0.01% |
+1,000
| New | +$141K |
|
4516
PUT
Evertec
EVTC
$1.97B
| $158K | ﹤0.01% |
4,900
+100
| +2% | +$3.29K |
|
4517
PUT
Krystal Biotech
KRYS
$10.7B
| $158K | ﹤0.01% |
2,000
+1,000
| +100% | +$74.2K |
|
4518
PUT
MINISO
MNSO
$3.88B
| $158K | ﹤0.01% |
14,800
+4,100
| +38% | +$34.3K |
|
4519
Mercury Systems
MRCY
$5.41B
| $158K | ﹤0.01% |
+3,543
| New | +$168K |
|
4520
CALL
UFP Industries
UFPI
$4.95B
| $158K | ﹤0.01% |
2,000
-1,300
| -39% | -$99.3K |
|
|
PFSW
4521
PUT
DELISTED
PFSweb, Inc.
PFSW
| $158K | ﹤0.01% |
+25,700
| New | +$240K |
|
4522
Agree Realty
ADC
$9.66B
| $157K | ﹤0.01% |
2,215
+899
| +68% | +$61.7K |
|
4523
MillerKnoll
MLKN
$1.56B
| $157K | ﹤0.01% |
+7,493
| New | +$150K |
|
4524
Snowflake
SNOW
$98.1B
| $157K | ﹤0.01% |
1,100
| – | – |
|
|
UROY
4525
PUT
Uranium Royalty Corp
UROY
$478M
| $157K | ﹤0.01% |
66,400
+30,400
| +84% | +$74K |
|
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.