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 | |
|---|---|---|---|---|---|---|
4351
PUT
Leidos
LDOS
$14.4B
| $178K | ﹤0.01% |
1,700
-7,200
| -81% | -$737K |
|
|
OLPX
4352
CALL
DELISTED
Olaplex Holdings
OLPX
| $178K | ﹤0.01% |
34,200
-96,800
| -74% | -$575K |
|
4353
CALL
Rigel Pharmaceuticals
RIGL
$723M
| $178K | ﹤0.01% |
11,900
+7,120
| +149% | +$65.3K |
|
|
SVM
4354
PUT
Silvercorp Metals
SVM
$2.02B
| $178K | ﹤0.01% |
60,200
+10,300
| +21% | +$27.9K |
|
4355
CALL
Transmedics
TMDX
$2.7B
| $178K | ﹤0.01% |
2,900
-94,800
| -97% | -$5.04M |
|
4356
PUT
Western Alliance Bancorporation
WAL
$8.81B
| $178K | ﹤0.01% |
3,000
+1,400
| +88% | +$90.7K |
|
|
LICY
4357
PUT
DELISTED
Li-Cycle Holdings Corp.
LICY
| $178K | ﹤0.01% |
4,675
-2,300
| -33% | -$103K |
|
4358
PUT
AvalonBay Communities
AVB
$27.5B
| $177K | ﹤0.01% |
1,100
-6,800
| -86% | -$1.16M |
|
4359
PUT
Carlyle Secured Lending
CGBD
$708M
| $177K | ﹤0.01% |
12,400
+9,000
| +265% | +$120K |
|
4360
PUT
Lightwave Logic
LWLG
$823M
| $177K | ﹤0.01% |
41,100
-24,500
| -37% | -$174K |
|
|
ODP
4361
PUT
DELISTED
ODP
ODP
| $177K | ﹤0.01% |
3,900
+2,800
| +255% | +$120K |
|
4362
PUT
Opko Health
OPK
$1.02B
| $177K | ﹤0.01% |
142,300
-3,800
| -3% | -$5.99K |
|
4363
RenaissanceRe
RNR
$13.8B
| $177K | ﹤0.01% |
966
+400
| +71% | +$67.4K |
|
4364
PUT
Energy Fuels
UUUU
$2.68B
| $177K | ﹤0.01% |
28,600
-6,500
| -19% | -$43K |
|
4365
CALL
Vicor
VICR
$8.33B
| $177K | ﹤0.01% |
3,300
+1,900
| +136% | +$99.9K |
|
|
JOAN
4366
DELISTED
JOANN, Inc. Common Stock
JOAN
| $177K | ﹤0.01% |
+62,451
| New | +$295K |
|
4367
Azenta
AZTA
$1.3B
| $176K | ﹤0.01% |
+3,028
| New | +$155K |
|
4368
CALL
Cohu
COHU
$1.86B
| $176K | ﹤0.01% |
5,500
+1,000
| +22% | +$32.4K |
|
|
CVAC
4369
PUT
DELISTED
CureVac
CVAC
| $176K | ﹤0.01% |
29,300
+17,700
| +153% | +$131K |
|
4370
CALL
Enanta Pharmaceuticals
ENTA
$362M
| $176K | ﹤0.01% |
3,800
-10,200
| -73% | -$465K |
|
4371
CALL
Inspire Medical Systems
INSP
$1.47B
| $176K | ﹤0.01% |
700
-16,400
| -96% | -$3.5M |
|
4372
CALL
Paysign
PAYS
$517M
| $176K | ﹤0.01% |
68,300
+32,500
| +91% | +$81.2K |
|
|
PDS
4373
CALL
Precision Drilling
PDS
$946M
| $176K | ﹤0.01% |
2,300
+500
| +28% | +$36.1K |
|
|
UROY
4374
Uranium Royalty Corp
UROY
$478M
| $176K | ﹤0.01% |
74,656
+51,656
| +225% | +$126K |
|
|
ACCD
4375
PUT
DELISTED
Accolade Inc
ACCD
| $176K | ﹤0.01% |
22,600
-106,800
| -83% | -$1.02M |
|
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.