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 | |
|---|---|---|---|---|---|---|
|
MPT
401
PUT
Medical Properties Trust
MPT
$2.88B
| $31.3M | 0.03% |
2,809,900
+1,294,700
| +85% | +$15.1M |
|
402
PUT
BHP
BHP
$215B
| $31.2M | 0.03% |
540,600
+369,700
| +216% | +$20.8M |
|
403
CALL
Twilio
TWLO
$27.8B
| $30.8M | 0.03% |
628,900
+200,400
| +47% | +$11.4M |
|
404
PUT
United Rentals
URI
$64.8B
| $30.6M | 0.03% |
86,200
-18,700
| -18% | -$6.14M |
|
405
CALL
Carnival Corporation Ltd
CCL
$35.7B
| $30.6M | 0.03% |
3,796,100
+486,600
| +15% | +$4.19M |
|
406
CALL
Duke Energy
DUK
$99.7B
| $30.5M | 0.03% |
295,900
+120,500
| +69% | +$11.6M |
|
407
PUT
Thermo Fisher Scientific
TMO
$196B
| $30.5M | 0.03% |
55,300
-5,100
| -8% | -$2.7M |
|
408
CALL
TJX Companies
TJX
$172B
| $30.4M | 0.03% |
381,300
+136,300
| +56% | +$10.1M |
|
409
CALL
DoorDash
DASH
$77.4B
| $30.3M | 0.03% |
621,400
+236,900
| +62% | +$12.3M |
|
410
CALL
Bilibili
BILI
$7.4B
| $30.3M | 0.03% |
1,279,700
+586,100
| +85% | +$9.32M |
|
|
UWC
411
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $30.2M | 0.03% |
1,583,100
-402,500
| -20% | -$7.68M |
|
412
PUT
Datadog
DDOG
$87.5B
| $30.2M | 0.03% |
410,800
+186,200
| +83% | +$14.5M |
|
413
CALL
Petrobras
PBR
$122B
| $30.2M | 0.03% |
2,838,400
+761,100
| +37% | +$9.19M |
|
414
CALL
Medtronic
MDT
$105B
| $30.1M | 0.03% |
387,800
-303,900
| -44% | -$24.6M |
|
415
PUT
MGM Resorts International
MGM
$11.6B
| $30.1M | 0.03% |
896,800
+306,100
| +52% | +$10.6M |
|
416
PUT
Burlington
BURL
$22.3B
| $29.5M | 0.03% |
145,700
+92,900
| +176% | +$14.8M |
|
417
PUT
Alcoa
AA
$12.2B
| $29.4M | 0.03% |
645,700
-392,100
| -38% | -$17.1M |
|
418
PUT
Cleveland-Cliffs
CLF
$5.39B
| $29.3M | 0.03% |
1,819,800
-520,600
| -22% | -$7.84M |
|
419
CALL
Analog Devices
ADI
$188B
| $29.3M | 0.03% |
178,800
+8,500
| +5% | +$1.33M |
|
420
Alphabet (Google) Class A
GOOGL
$4.17T
| $29.3M | 0.03% |
331,874
-385,250
| -54% | -$36.6M |
|
421
CALL
Halliburton
HAL
$27.6B
| $29.3M | 0.03% |
769,600
+154,200
| +25% | +$5.46M |
|
422
PUT
HCA Healthcare
HCA
$82.5B
| $29.1M | 0.03% |
121,400
-44,300
| -27% | -$9.92M |
|
423
CALL
Automatic Data Processing
ADP
$97.2B
| $29M | 0.03% |
121,400
+52,000
| +75% | +$12.8M |
|
|
PARA
424
PUT
DELISTED
Paramount Global Class B
PARA
| $29M | 0.03% |
1,715,500
+81,200
| +5% | +$1.49M |
|
425
CALL
Vale
VALE
$63.2B
| $28.9M | 0.03% |
1,706,000
+295,100
| +21% | +$4.44M |
|
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.