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 | |
|---|---|---|---|---|---|---|
|
GORV
7351
DELISTED
Lazydays
GORV
| $12K | ﹤0.01% |
+34
| New | +$13.3K |
|
7352
CALL
iPath Series B Carbon Exchange-Traded Notes
GRN
$23.8M
| $12K | ﹤0.01% |
400
-400
| -50% | -$12.3K |
|
7353
PUT
Hayward Holdings
HAYW
$3.26B
| $12K | ﹤0.01% |
1,300
-4,700
| -78% | -$43.7K |
|
7354
PUT
Healthcare Services Group
HCSG
$1.58B
| $12K | ﹤0.01% |
1,000
-1,200
| -55% | -$15.8K |
|
7355
PUT
Immunovant
IMVT
$8.11B
| $12K | ﹤0.01% |
700
-10,000
| -93% | -$126K |
|
7356
Invitation Homes
INVH
$17.6B
| $12K | ﹤0.01% |
+418
| New | +$13.2K |
|
7357
PUT
Iris Energy
IREN
$13.7B
| $12K | ﹤0.01% |
10,300
+9,100
| +758% | +$21.6K |
|
7358
Jack in the Box
JACK
$312M
| $12K | ﹤0.01% |
177
-316
| -64% | -$24.3K |
|
7359
PUT
LifeMD
LFMD
$176M
| $12K | ﹤0.01% |
6,300
-3,900
| -38% | -$8.74K |
|
7360
Lemonade
LMND
$3.76B
| $12K | ﹤0.01% |
937
+100
| +12% | +$1.98K |
|
7361
CALL
Lantronix
LTRX
$239M
| $12K | ﹤0.01% |
3,000
+2,000
| +200% | +$9.41K |
|
7362
Momentus
MNTS
$85.1M
| $12K | ﹤0.01% |
1
-1
| -50% | -$14.4K |
|
7363
CALL
Movado Group
MOV
$849M
| $12K | ﹤0.01% |
400
+200
| +100% | +$6.38K |
|
7364
PUT
Everspin Technologies
MRAM
$339M
| $12K | ﹤0.01% |
2,200
+2,000
| +1,000% | +$11.8K |
|
7365
PUT
Maravai LifeSciences
MRVI
$996M
| $12K | ﹤0.01% |
900
+100
| +13% | +$1.57K |
|
7366
CALL
NETGEAR
NTGR
$616M
| $12K | ﹤0.01% |
700
-27,400
| -98% | -$540K |
|
7367
CALL
Ocular Therapeutix
OCUL
$1.85B
| $12K | ﹤0.01% |
4,500
-7,000
| -61% | -$23.2K |
|
7368
Oportun Financial
OPRT
$259M
| $12K | ﹤0.01% |
+2,301
| New | +$12K |
|
|
7369
PUT
Oportun Financial
OPRT
$259M
| $12K | ﹤0.01% |
2,200
-1,800
| -45% | -$9.41K |
|
7370
CALL
PAVmed
PAVM
$36.2M
| $12K | ﹤0.01% |
58
-21
| -27% | -$7.93K |
|
7371
PUT
PureCycle Technologies
PCT
$1.27B
| $12K | ﹤0.01% |
1,900
-17,400
| -90% | -$125K |
|
7372
PennantPark Floating Rate Capital
PFLT
$696M
| $12K | ﹤0.01% |
1,176
+788
| +203% | +$8.64K |
|
|
PHX
7373
PUT
DELISTED
PHX Minerals
PHX
| $12K | ﹤0.01% |
3,300
+800
| +32% | +$3K |
|
7374
Pinterest
PINS
$13.7B
| $12K | ﹤0.01% |
500
+400
| +400% | +$9.54K |
|
7375
CALL
Park Aerospace
PKE
$730M
| $12K | ﹤0.01% |
900
-2,200
| -71% | -$26.6K |
|
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.