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 | |
|---|---|---|---|---|---|---|
501
PUT
Digital Realty Trust
DLR
$66B
| $23.1M | 0.03% |
230,800
+67,300
| +41% | +$6.87M |
|
502
Alibaba
BABA
$279B
| $23.1M | 0.03% |
+262,591
| New | +$20.7M |
|
503
PUT
Lennar Class A
LEN
$19.8B
| $23.1M | 0.03% |
263,828
-279,014
| -51% | -$22.6M |
|
504
CALL
XPeng
XPEV
$12.3B
| $23M | 0.03% |
2,317,000
+1,107,200
| +92% | +$9.98M |
|
505
PUT
Antero Resources
AR
$10.9B
| $23M | 0.03% |
742,000
+79,200
| +12% | +$2.74M |
|
506
CALL
Palantir
PLTR
$299B
| $22.9M | 0.02% |
3,561,700
+126,700
| +4% | +$960K |
|
|
WBA
507
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $22.8M | 0.02% |
611,600
-410,800
| -40% | -$15.4M |
|
508
CALL
Peabody Energy
BTU
$2.91B
| $22.6M | 0.02% |
855,100
-11,700
| -1% | -$322K |
|
509
CALL
Shell
SHEL
$243B
| $22.4M | 0.02% |
393,100
-129,300
| -25% | -$7.13M |
|
510
CALL
CarMax
KMX
$8.15B
| $22.2M | 0.02% |
363,900
+175,100
| +93% | +$11.2M |
|
|
IPFF
511
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $22.1M | 0.02% |
440,100
+247,300
| +128% | +$12.4M |
|
512
CALL
Linde
LIN
$235B
| $22.1M | 0.02% |
67,800
+13,600
| +25% | +$4.26M |
|
|
ATVI
513
PUT
DELISTED
Activision Blizzard
ATVI
| $22M | 0.02% |
288,000
+15,500
| +6% | +$1.15M |
|
514
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$432M
| $22M | 0.02% |
916,100
-164,500
| -15% | -$4.79M |
|
515
CALL
Li Auto
LI
$12B
| $21.9M | 0.02% |
1,075,600
+188,100
| +21% | +$3.58M |
|
516
CALL
Illumina
ILMN
$28.9B
| $21.9M | 0.02% |
111,230
-81,931
| -42% | -$17M |
|
517
PUT
Darden Restaurants
DRI
$22.2B
| $21.9M | 0.02% |
158,100
-4,300
| -3% | -$600K |
|
|
518
PUT
Peabody Energy
BTU
$2.91B
| $21.9M | 0.02% |
827,600
+289,800
| +54% | +$7.96M |
|
519
CALL
Archer Daniels Midland
ADM
$42.1B
| $21.7M | 0.02% |
234,200
+113,100
| +93% | +$10.4M |
|
520
PUT
AstraZeneca
AZN
$263B
| $21.7M | 0.02% |
160,200
+37,700
| +31% | +$4.73M |
|
521
CALL
Akamai
AKAM
$18.1B
| $21.7M | 0.02% |
257,400
-75,900
| -23% | -$6.61M |
|
522
CALL
Cheniere Energy
LNG
$56B
| $21.7M | 0.02% |
144,400
-149,600
| -51% | -$25M |
|
523
PUT
Electronic Arts
EA
$52.4B
| $21.6M | 0.02% |
176,800
-127,900
| -42% | -$16.1M |
|
524
PUT
Phillips 66
PSX
$84.8B
| $21.5M | 0.02% |
206,900
-26,000
| -11% | -$2.66M |
|
525
CALL
Cleveland-Cliffs
CLF
$5.39B
| $21.5M | 0.02% |
1,335,800
+18,700
| +1% | +$282K |
|
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.