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 | |
|---|---|---|---|---|---|---|
3776
CALL
Backblaze
BLZE
$724M
| $290K | ﹤0.01% |
47,200
-116,700
| -71% | -$559K |
|
3777
Ternium
TX
$9.68B
| $290K | ﹤0.01% |
9,519
-3,671
| -28% | -$110K |
|
3778
PUT
Valaris
VAL
$5.16B
| $290K | ﹤0.01% |
4,300
+3,000
| +231% | +$187K |
|
3779
PUT
Flex
FLEX
$41.5B
| $289K | ﹤0.01% |
17,915
-265,400
| -94% | -$3.98M |
|
3780
Hillman Solutions
HLMN
$1.6B
| $289K | ﹤0.01% |
40,187
+18,974
| +89% | +$143K |
|
3781
CALL
Acadia Healthcare
ACHC
$3.01B
| $288K | ﹤0.01% |
3,500
+3,200
| +1,067% | +$264K |
|
3782
PUT
Arcturus Therapeutics
ARCT
$163M
| $288K | ﹤0.01% |
17,000
+13,900
| +448% | +$242K |
|
3783
CALL
PubMatic
PUBM
$605M
| $288K | ﹤0.01% |
22,500
-25,800
| -53% | -$404K |
|
3784
Boston Beer
SAM
$1.93B
| $288K | ﹤0.01% |
876
+766
| +696% | +$278K |
|
3785
System1
SST
$15M
| $288K | ﹤0.01% |
+6,160
| New | +$317K |
|
3786
PUT
Vanguard Dividend Appreciation ETF
VIG
$113B
| $288K | ﹤0.01% |
1,900
-1,300
| -41% | -$194K |
|
|
VIVO
3787
CALL
DELISTED
Meridian Bioscience Inc
VIVO
| $288K | ﹤0.01% |
8,700
-18,100
| -68% | -$583K |
|
3788
PUT
Matsons
MATX
$6.15B
| $287K | ﹤0.01% |
4,600
-39,800
| -90% | -$2.63M |
|
3789
PUT
TaskUs
TASK
$568M
| $287K | ﹤0.01% |
17,000
+5,600
| +49% | +$105K |
|
3790
PUT
Xylem
XYL
$29.7B
| $287K | ﹤0.01% |
2,600
-1,200
| -32% | -$126K |
|
|
BNFT
3791
CALL
DELISTED
Benefitfocus, Inc.
BNFT
| $287K | ﹤0.01% |
27,500
+27,000
| +5,400% | +$242K |
|
3792
PUT
Ardmore Shipping
ASC
$669M
| $286K | ﹤0.01% |
19,900
-14,100
| -41% | -$187K |
|
3793
CALL
Harrow
HROW
$1.47B
| $286K | ﹤0.01% |
19,400
-10,100
| -34% | -$121K |
|
|
IMGN
3794
CALL
DELISTED
Immunogen Inc
IMGN
| $286K | ﹤0.01% |
57,700
+14,500
| +34% | +$78.6K |
|
3795
PUT
Adecoagro
AGRO
$1.45B
| $285K | ﹤0.01% |
34,400
+15,100
| +78% | +$124K |
|
3796
PUT
Lamb Weston
LW
$7.51B
| $285K | ﹤0.01% |
3,200
-19,600
| -86% | -$1.67M |
|
3797
PUT
Ormat Technologies
ORA
$6.05B
| $285K | ﹤0.01% |
3,300
-9,100
| -73% | -$817K |
|
3798
Sonos
SONO
$2B
| $285K | ﹤0.01% |
16,908
-7,299
| -30% | -$119K |
|
|
ONC
3799
CALL
BeOne Medicines Ltd
ONC
$34.3B
| $285K | ﹤0.01% |
1,300
+900
| +225% | +$165K |
|
|
FRMM
3800
CALL
Forum Markets
FRMM
$70.3M
| $284K | ﹤0.01% |
442
+413
| +1,424% | +$620K |
|
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.