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 | |
|---|---|---|---|---|---|---|
7326
CALL
ProFrac Holding
ACDC
$671M
| $12K | ﹤0.01% |
+500
| New | +$11K |
|
|
ACLX
7327
PUT
DELISTED
Arcellx
ACLX
| $12K | ﹤0.01% |
400
-9,600
| -96% | -$220K |
|
|
AFMD
7328
PUT
DELISTED
Affimed
AFMD
| $12K | ﹤0.01% |
1,040
-1,890
| -65% | -$33.2K |
|
7329
PUT
Aviat Networks
AVNW
$271M
| $12K | ﹤0.01% |
400
-100
| -20% | -$3.04K |
|
7330
CALL
AZZ Inc
AZZ
$4.36B
| $12K | ﹤0.01% |
300
+100
| +50% | +$3.93K |
|
7331
CALL
Bright Horizons
BFAM
$4.1B
| $12K | ﹤0.01% |
200
-100
| -33% | -$6.55K |
|
7332
Bitwise Crypto Industry Innovators ETF
BITQ
$393M
| $12K | ﹤0.01% |
+3,738
| New | +$18.6K |
|
7333
CALL
Brookdale Senior Living
BKD
$3.49B
| $12K | ﹤0.01% |
4,600
-1,900
| -29% | -$7.1K |
|
|
BLFY
7334
CALL
DELISTED
Blue Foundry Bancorp
BLFY
| $12K | ﹤0.01% |
1,000
-1,400
| -58% | -$17.3K |
|
7335
CALL
Broadwind
BWEN
$91.3M
| $12K | ﹤0.01% |
7,200
-12,000
| -63% | -$22.6K |
|
|
CADE
7336
CALL
DELISTED
Cadence Bank
CADE
| $12K | ﹤0.01% |
500
-5,400
| -92% | -$145K |
|
7337
PUT
Cadre Holdings
CDRE
$1.31B
| $12K | ﹤0.01% |
600
| – | – |
|
7338
CEVA Inc
CEVA
$916M
| $12K | ﹤0.01% |
+492
| New | +$13.3K |
|
7339
CION Investment
CION
$294M
| $12K | ﹤0.01% |
1,303
-7,604
| -85% | -$73.8K |
|
7340
PUT
Clover Health Investments
CLOV
$2.29B
| $12K | ﹤0.01% |
13,100
-244,500
| -95% | -$326K |
|
7341
CALL
Corbus Pharmaceuticals
CRBP
$168M
| $12K | ﹤0.01% |
3,870
-80
| -2% | -$308 |
|
7342
CuriosityStream
CURI
$143M
| $12K | ﹤0.01% |
11,223
+5,836
| +108% | +$7.58K |
|
|
KUST
7343
CALL
Kustom Entertainment Inc
KUST
$740K
| – | – |
0
| – | – |
|
7344
PUT
DNOW Inc
DNOW
$2.51B
| $12K | ﹤0.01% |
1,000
+500
| +100% | +$6.06K |
|
|
DRD
7345
PUT
DRDGold
DRD
$1.81B
| $12K | ﹤0.01% |
1,700
-2,300
| -58% | -$14.2K |
|
7346
PUT
Emergent Biosolutions
EBS
$375M
| $12K | ﹤0.01% |
1,100
-11,100
| -91% | -$172K |
|
7347
PUT
Eldorado Gold
EGO
$8.53B
| $12K | ﹤0.01% |
1,500
-400
| -21% | -$2.84K |
|
7348
First Trust Global Wind Energy ETF
FAN
$278M
| $12K | ﹤0.01% |
724
-482
| -40% | -$7.93K |
|
7349
CALL
FirstService
FSV
$6.65B
| $12K | ﹤0.01% |
100
| – | – |
|
|
7350
PUT
FirstService
FSV
$6.65B
| $12K | ﹤0.01% |
100
-1,300
| -93% | -$161K |
|
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.