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 | |
|---|---|---|---|---|---|---|
426
CALL
Philip Morris
PM
$303B
| $28.9M | 0.03% |
285,900
+101,100
| +55% | +$9.54M |
|
427
CALL
DexCom
DXCM
$27.6B
| $28.8M | 0.03% |
254,700
+164,500
| +182% | +$18.1M |
|
428
PUT
Zscaler
ZS
$23B
| $28.7M | 0.03% |
256,400
-5,900
| -2% | -$802K |
|
429
PUT
Prudential Financial
PRU
$41.3B
| $28.7M | 0.03% |
288,100
-128,300
| -31% | -$13M |
|
430
PUT
General Dynamics
GD
$101B
| $28.6M | 0.03% |
115,300
+98,800
| +599% | +$24.1M |
|
431
CALL
Air Products & Chemicals
APD
$66.1B
| $28.5M | 0.03% |
92,600
+14,300
| +18% | +$4.03M |
|
432
CALL
United Rentals
URI
$64.8B
| $28.5M | 0.03% |
80,100
-18,400
| -19% | -$6.05M |
|
433
PUT
Automatic Data Processing
ADP
$97.2B
| $28.4M | 0.03% |
119,100
+56,100
| +89% | +$13.8M |
|
434
CALL
Emerson Electric
EMR
$78.2B
| $28.4M | 0.03% |
295,900
+87,100
| +42% | +$7.83M |
|
435
CALL
Okta
OKTA
$23.8B
| $28.4M | 0.03% |
415,700
-108,600
| -21% | -$6.2M |
|
436
PUT
Norwegian Cruise Line
NCLH
$8.87B
| $28.4M | 0.03% |
2,318,600
-343,200
| -13% | -$5.17M |
|
437
PUT
Illumina
ILMN
$28.9B
| $28.2M | 0.03% |
143,612
+17,271
| +14% | +$3.58M |
|
438
CALL
Autodesk
ADSK
$43B
| $28.2M | 0.03% |
150,700
+46,400
| +44% | +$9.31M |
|
439
PUT
Capital One
COF
$124B
| $28.1M | 0.03% |
302,700
+110,700
| +58% | +$10.9M |
|
440
PUT
EOG Resources
EOG
$76.7B
| $28.1M | 0.03% |
217,100
+34,400
| +19% | +$4.58M |
|
441
PUT
Prologis
PLD
$135B
| $28M | 0.03% |
248,700
-45,000
| -15% | -$4.99M |
|
442
PUT
Duke Energy
DUK
$99.7B
| $27.8M | 0.03% |
270,400
+89,300
| +49% | +$8.57M |
|
443
PUT
RH
RH
$3.31B
| $27.8M | 0.03% |
104,200
+12,500
| +14% | +$3.26M |
|
|
444
PUT
Air Products & Chemicals
APD
$66.1B
| $27.8M | 0.03% |
90,300
+61,500
| +214% | +$17.3M |
|
445
CALL
Cloudflare
NET
$95.5B
| $27.8M | 0.03% |
615,500
+167,800
| +37% | +$8.3M |
|
446
PUT
American Tower
AMT
$77.4B
| $27.6M | 0.03% |
130,300
+95,100
| +270% | +$19.8M |
|
|
X
447
PUT
DELISTED
US Steel
X
| $27.5M | 0.03% |
1,098,100
-42,500
| -4% | -$980K |
|
|
SIVB
448
PUT
DELISTED
SVB Financial Group
SIVB
| $27.3M | 0.03% |
118,600
+95,300
| +409% | +$23.7M |
|
449
PUT
Invesco Aerospace & Defense ETF
PPA
$8.03B
| $27.2M | 0.03% |
204,400
+118,500
| +138% | +$8.92M |
|
450
CALL
Simon Property Group
SPG
$73.4B
| $27.1M | 0.03% |
230,800
+72,000
| +45% | +$8M |
|
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.