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 | |
|---|---|---|---|---|---|---|
1401
CALL
Shift4
FOUR
$3.84B
| $3.76M | ﹤0.01% |
67,200
+55,700
| +484% | +$2.63M |
|
1402
CALL
BJs Wholesale Club
BJ
$11.9B
| $3.76M | ﹤0.01% |
56,800
-84,300
| -60% | -$6.11M |
|
|
NATI
1403
CALL
DELISTED
National Instruments Corp
NATI
| $3.76M | ﹤0.01% |
101,800
+97,700
| +2,383% | +$3.82M |
|
1404
PUT
Infosys
INFY
$45B
| $3.75M | ﹤0.01% |
208,400
-17,400
| -8% | -$324K |
|
1405
PUT
Vistra
VST
$55.1B
| $3.75M | ﹤0.01% |
161,500
+9,300
| +6% | +$215K |
|
1406
Viking Therapeutics
VKTX
$4.04B
| $3.74M | ﹤0.01% |
398,093
+372,508
| +1,456% | +$1.66M |
|
1407
AGNC Investment
AGNC
$12.3B
| $3.74M | ﹤0.01% |
361,538
+90,455
| +33% | +$826K |
|
1408
PUT
Elastic
ESTC
$6.1B
| $3.73M | ﹤0.01% |
72,500
+8,700
| +14% | +$521K |
|
1409
Altimmune
ALT
$539M
| $3.73M | ﹤0.01% |
226,629
+88,886
| +65% | +$998K |
|
1410
PUT
Brunswick
BC
$5.19B
| $3.73M | ﹤0.01% |
51,700
-6,900
| -12% | -$491K |
|
1411
Boston Properties
BXP
$11B
| $3.72M | ﹤0.01% |
55,055
-24,550
| -31% | -$1.74M |
|
1412
PUT
Duolingo
DUOL
$5.7B
| $3.72M | ﹤0.01% |
52,300
-7,400
| -12% | -$578K |
|
|
KRTX
1413
CALL
DELISTED
Karuna Therapeutics, Inc. Common Stock
KRTX
| $3.71M | ﹤0.01% |
18,900
-7,000
| -27% | -$1.5M |
|
1414
PUT
argenx
ARGX
$57.4B
| $3.71M | ﹤0.01% |
9,800
+6,300
| +180% | +$2.36M |
|
1415
PUT
FIVE9
FIVN
$1.77B
| $3.71M | ﹤0.01% |
54,700
+47,900
| +704% | +$3.01M |
|
1416
CALL
Sabre
SABR
$656M
| $3.71M | ﹤0.01% |
600,400
-159,800
| -21% | -$892K |
|
1417
AstraZeneca
AZN
$263B
| $3.71M | ﹤0.01% |
+27,340
| New | +$3.43M |
|
1418
CALL
Northern Oil and Gas
NOG
$2.3B
| $3.71M | ﹤0.01% |
120,300
+86,600
| +257% | +$2.91M |
|
1419
PUT
Huazhu Hotels Group
HTHT
$12.4B
| $3.7M | ﹤0.01% |
87,300
+56,100
| +180% | +$2.03M |
|
1420
Kraft Heinz
KHC
$30.4B
| $3.7M | ﹤0.01% |
90,951
+28,932
| +47% | +$1.1M |
|
|
PR
1421
CALL
Permian Resources
PR
$17.9B
| $3.7M | ﹤0.01% |
393,800
+51,200
| +15% | +$490K |
|
1422
CALL
Cheesecake Factory
CAKE
$4.21B
| $3.68M | ﹤0.01% |
116,000
+11,200
| +11% | +$374K |
|
1423
CALL
TripAdvisor
TRIP
$1.59B
| $3.68M | ﹤0.01% |
204,500
+94,700
| +86% | +$1.98M |
|
1424
iShares Russell 1000 Value ETF
IWD
$82B
| $3.65M | ﹤0.01% |
+24,104
| New | +$3.61M |
|
1425
PUT
Vornado Realty Trust
VNO
$7.47B
| $3.65M | ﹤0.01% |
175,300
+69,700
| +66% | +$1.6M |
|
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.