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 | |
|---|---|---|---|---|---|---|
3326
PUT
XP
XP
$8.67B
| $429K | ﹤0.01% |
28,000
| – | – |
|
3327
CALL
InfraCap MLP ETF
AMZA
$469M
| $428K | ﹤0.01% |
14,100
-1,500
| -10% | -$47.7K |
|
3328
BorgWarner
BWA
$12.8B
| $428K | ﹤0.01% |
12,080
-1,114
| -8% | -$37.9K |
|
3329
PUT
Principal Financial Group
PFG
$24.2B
| $427K | ﹤0.01% |
5,100
+2,200
| +76% | +$189K |
|
3330
Winnebago Industries
WGO
$924M
| $427K | ﹤0.01% |
8,104
-530
| -6% | -$30.1K |
|
3331
Credit Acceptance
CACC
$5.77B
| $426K | ﹤0.01% |
+900
| New | +$413K |
|
3332
CALL
Rogers Communications
RCI
$18.1B
| $426K | ﹤0.01% |
9,100
+3,700
| +69% | +$158K |
|
3333
RLX Technology
RLX
$2.47B
| $426K | ﹤0.01% |
185,618
+174,952
| +1,640% | +$311K |
|
3334
PUT
Webster Financial
WBS
$12.4B
| $426K | ﹤0.01% |
9,000
+8,900
| +8,900% | +$446K |
|
3335
PUT
Boise Cascade
BCC
$2.87B
| $425K | ﹤0.01% |
6,200
+2,600
| +72% | +$177K |
|
3336
PUT
BRC Inc
BRCC
$117M
| $425K | ﹤0.01% |
69,700
-33,500
| -32% | -$219K |
|
|
BCYC
3337
Bicycle Therapeutics
BCYC
$273M
| $424K | ﹤0.01% |
14,334
+14,092
| +5,823% | +$378K |
|
3338
CALL
Federal Realty Investment Trust
FRT
$11.1B
| $424K | ﹤0.01% |
4,200
+2,800
| +200% | +$284K |
|
3339
CALL
Annexon
ANNX
$809M
| $423K | ﹤0.01% |
81,900
-51,800
| -39% | -$285K |
|
3340
ProShares Ultra QQQ
QLD
$12B
| $423K | ﹤0.01% |
+24,160
| New | +$465K |
|
|
DCH
3341
Dauch Corp
DCH
$1.32B
| $422K | ﹤0.01% |
54,071
-61,415
| -53% | -$550K |
|
3342
PUT
Quest Diagnostics
DGX
$26.5B
| $422K | ﹤0.01% |
2,700
+800
| +42% | +$115K |
|
|
HUYA
3343
CALL
Huya Inc
HUYA
$561M
| $422K | ﹤0.01% |
106,900
+19,000
| +22% | +$48.1K |
|
3344
Pentair
PNR
$10.6B
| $422K | ﹤0.01% |
9,393
+3,735
| +66% | +$162K |
|
3345
First Citizens BancShares
FCNCA
$24.9B
| $421K | ﹤0.01% |
+556
| New | +$448K |
|
3346
National Grid
NGG
$82.3B
| $421K | ﹤0.01% |
7,409
-16,681
| -69% | -$892K |
|
3347
PubMatic
PUBM
$605M
| $420K | ﹤0.01% |
32,843
-25,812
| -44% | -$405K |
|
3348
CALL
Trane Technologies
TT
$102B
| $420K | ﹤0.01% |
2,500
-19,600
| -89% | -$3.24M |
|
|
SP
3349
CALL
DELISTED
SP Plus Corporation
SP
| $420K | ﹤0.01% |
+12,100
| New | +$417K |
|
3350
CALL
Fulgent Genetics
FLGT
$556M
| $419K | ﹤0.01% |
14,100
-43,000
| -75% | -$1.54M |
|
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.