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 | |
|---|---|---|---|---|---|---|
6951
CALL
ASE Group
ASX
$77.3B
| $18K | ﹤0.01% |
2,900
-14,100
| -83% | -$82.6K |
|
|
BCLI
6952
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $18K | ﹤0.01% |
737
+724
| +5,569% | +$27.1K |
|
|
BRSP
6953
CALL
BrightSpire Capital
BRSP
$634M
| $18K | ﹤0.01% |
3,000
-3,800
| -56% | -$26.4K |
|
|
BRY
6954
CALL
DELISTED
Berry Corp
BRY
| $18K | ﹤0.01% |
2,300
-1,200
| -34% | -$10.3K |
|
6955
Caleres
CAL
$431M
| $18K | ﹤0.01% |
850
-27,673
| -97% | -$679K |
|
6956
CALL
Corcept Therapeutics
CORT
$12.4B
| $18K | ﹤0.01% |
900
-5,300
| -85% | -$133K |
|
6957
PUT
Caribou Biosciences
CRBU
$145M
| $18K | ﹤0.01% |
2,900
-1,000
| -26% | -$8.9K |
|
6958
Corvus Pharmaceuticals
CRVS
$1.12B
| $18K | ﹤0.01% |
21,419
+5,369
| +33% | +$4.75K |
|
6959
PUT
Digimarc Corp
DMRC
$147M
| $18K | ﹤0.01% |
1,000
-1,800
| -64% | -$33.6K |
|
6960
Precision BioSciences
DTIL
$180M
| $18K | ﹤0.01% |
509
-283
| -36% | -$11.2K |
|
6961
New Oriental
EDU
$9.37B
| $18K | ﹤0.01% |
530
-250
| -32% | -$7.06K |
|
|
GPMT
6962
CALL
Granite Point Mortgage Trust
GPMT
$69M
| $18K | ﹤0.01% |
3,500
-10,500
| -75% | -$68.2K |
|
|
HOOK
6963
CALL
DELISTED
HOOKIPA Pharma
HOOK
| $18K | ﹤0.01% |
2,270
+2,010
| +773% | +$21.8K |
|
6964
CALL
Innodata
INOD
$2.05B
| $18K | ﹤0.01% |
6,300
+1,200
| +24% | +$3.82K |
|
|
JBGS
6965
CALL
JBG SMITH
JBGS
$818M
| $18K | ﹤0.01% |
1,000
+700
| +233% | +$13.5K |
|
6966
KraneShares MSCI China Clean Technology Index ETF
KGRN
$54.8M
| $18K | ﹤0.01% |
692
+657
| +1,877% | +$18K |
|
6967
PUT
Seres Therapeutics
MCRB
$46.8M
| $18K | ﹤0.01% |
165
-3,025
| -95% | -$406K |
|
6968
PUT
Monro
MNRO
$383M
| $18K | ﹤0.01% |
+400
| New | +$18.5K |
|
|
MRSN
6969
DELISTED
Mersana Therapeutics
MRSN
| $18K | ﹤0.01% |
124
+74
| +148% | +$12.5K |
|
6970
CALL
National Fuel Gas
NFG
$7.82B
| $18K | ﹤0.01% |
300
-3,300
| -92% | -$212K |
|
|
NINE
6971
PUT
DELISTED
Nine Energy Service
NINE
| $18K | ﹤0.01% |
1,300
-3,000
| -70% | -$23.5K |
|
6972
CALL
Nektar Therapeutics
NKTR
$2.39B
| $18K | ﹤0.01% |
560
-14,533
| -96% | -$703K |
|
|
NVVE
6973
DELISTED
Nuvve Holding Corp
NVVE
| – | – |
0
| – | – |
|
6974
PUT
Patrick Industries
PATK
$2.74B
| $18K | ﹤0.01% |
450
-1,500
| -77% | -$52.2K |
|
|
PBPB
6975
CALL
DELISTED
Potbelly
PBPB
| $18K | ﹤0.01% |
3,300
-4,700
| -59% | -$24.7K |
|
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.