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 | |
|---|---|---|---|---|---|---|
951
CALL
PTC
PTC
$13.1B
| $7.95M | 0.01% |
66,200
+25,300
| +62% | +$3.03M |
|
|
BBBY
952
CALL
DELISTED
Bed Bath & Beyond Inc
BBBY
| $7.94M | 0.01% |
3,164,600
+197,200
| +7% | +$774K |
|
953
PUT
Sony
SONY
$122B
| $7.93M | 0.01% |
520,000
+182,000
| +54% | +$2.72M |
|
|
RXDX
954
PUT
DELISTED
Prometheus Biosciences, Inc. Common Stock
RXDX
| $7.93M | 0.01% |
72,100
+69,300
| +2,475% | +$4.49M |
|
955
CALL
Carlyle Group
CG
$16B
| $7.92M | 0.01% |
265,500
+203,900
| +331% | +$5.82M |
|
956
CALL
Genuine Parts
GPC
$16.6B
| $7.91M | 0.01% |
45,600
+32,500
| +248% | +$5.65M |
|
957
PUT
Thor Industries
THO
$3.9B
| $7.9M | 0.01% |
104,700
-41,600
| -28% | -$3.34M |
|
958
CALL
CSX Corp
CSX
$98.1B
| $7.9M | 0.01% |
254,900
-17,800
| -7% | -$535K |
|
959
CALL
Avis
CAR
$5.62B
| $7.88M | 0.01% |
48,100
+22,400
| +87% | +$4.49M |
|
960
PUT
Rockwell Automation
ROK
$51.3B
| $7.86M | 0.01% |
30,500
+4,300
| +16% | +$1.08M |
|
961
PUT
Crown Castle
CCI
$32.5B
| $7.85M | 0.01% |
57,900
-15,800
| -21% | -$2.14M |
|
962
CALL
General Dynamics
GD
$103B
| $7.84M | 0.01% |
31,600
-19,400
| -38% | -$4.73M |
|
963
Mondelez International
MDLZ
$77.1B
| $7.84M | 0.01% |
117,593
+23,033
| +24% | +$1.46M |
|
964
Dominion Energy
D
$62.8B
| $7.83M | 0.01% |
127,761
+126,292
| +8,597% | +$7.93M |
|
965
Valero Energy
VLO
$90.6B
| $7.82M | 0.01% |
61,639
-104,114
| -63% | -$13.1M |
|
966
PUT
BioMarin Pharmaceuticals
BMRN
$11.4B
| $7.81M | 0.01% |
75,500
+10,500
| +16% | +$986K |
|
967
PUT
Fortinet
FTNT
$111B
| $7.8M | 0.01% |
159,600
-55,800
| -26% | -$2.91M |
|
968
CALL
PBF Energy
PBF
$7.33B
| $7.8M | 0.01% |
191,200
+90,800
| +90% | +$3.77M |
|
969
CALL
Enovix
ENVX
$947M
| $7.8M | 0.01% |
716,229
-217,257
| -23% | -$2.67M |
|
970
NextEra Energy
NEE
$187B
| $7.79M | 0.01% |
+93,228
| New | +$7.53M |
|
971
ProShares UltraShort S&P500
SDS
$407M
| $7.79M | 0.01% |
33,891
+33,062
| +3,988% | +$7.67M |
|
972
PUT
ZIM Integrated Shipping Services
ZIM
$3.08B
| $7.79M | 0.01% |
452,900
+208,800
| +86% | +$4.64M |
|
|
APLS
973
CALL
DELISTED
Apellis Pharmaceuticals
APLS
| $7.78M | 0.01% |
150,500
+131,900
| +709% | +$7M |
|
974
CALL
Shake Shack
SHAK
$2.26B
| $7.78M | 0.01% |
187,300
+100,000
| +115% | +$4.87M |
|
975
CALL
Sysco
SYY
$39.1B
| $7.77M | 0.01% |
101,700
-3,500
| -3% | -$283K |
|
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.