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 | |
|---|---|---|---|---|---|---|
6976
CALL
Pixelworks
PXLW
$38.2M
| $18K | ﹤0.01% |
892
-283
| -24% | -$5.06K |
|
6977
CALL
QuinStreet
QNST
$890M
| $18K | ﹤0.01% |
1,300
-49,100
| -97% | -$623K |
|
|
6978
PUT
QuinStreet
QNST
$890M
| $18K | ﹤0.01% |
1,300
-5,200
| -80% | -$66K |
|
6979
Root
ROOT
$857M
| $18K | ﹤0.01% |
4,201
-7,925
| -65% | -$54.7K |
|
6980
PUT
abrdn Physical Silver Shares ETF
SIVR
$4.02B
| $18K | ﹤0.01% |
800
-15,700
| -95% | -$321K |
|
6981
CALL
SK Telecom
SKM
$12.1B
| $18K | ﹤0.01% |
900
-700
| -44% | -$14.2K |
|
6982
PUT
Steris
STE
$22.3B
| $18K | ﹤0.01% |
100
-4,000
| -98% | -$703K |
|
6983
CALL
The ONE Group
STKS
$56.2M
| $18K | ﹤0.01% |
3,000
+2,000
| +200% | +$13.1K |
|
6984
CALL
Southwest Gas
SWX
$6.47B
| $18K | ﹤0.01% |
300
| – | – |
|
6985
PUT
TFS Financial
TFSL
$5.16B
| $18K | ﹤0.01% |
1,300
-1,600
| -55% | -$21.9K |
|
6986
TriNet
TNET
$3.02B
| $18K | ﹤0.01% |
267
+150
| +128% | +$10.3K |
|
|
TSE
6987
PUT
DELISTED
Trinseo
TSE
| $18K | ﹤0.01% |
800
-9,000
| -92% | -$198K |
|
6988
Veeco
VECO
$3.05B
| $18K | ﹤0.01% |
1,014
-8,086
| -89% | -$152K |
|
6989
PUT
Viavi Solutions
VIAV
$9.12B
| $18K | ﹤0.01% |
+1,800
| New | +$21.7K |
|
6990
X4 Pharmaceuticals
XFOR
$375M
| $18K | ﹤0.01% |
611
+236
| +63% | +$11.2K |
|
6991
PUT
XPEL
XPEL
$1.22B
| $18K | ﹤0.01% |
300
-4,900
| -94% | -$313K |
|
6992
XPeng
XPEV
$12.4B
| $18K | ﹤0.01% |
1,850
-316,221
| -99% | -$2.85M |
|
6993
PUT
Zai Lab
ZLAB
$2.06B
| $18K | ﹤0.01% |
600
-900
| -60% | -$28.4K |
|
6994
Q32 Bio
QTTB
$466M
| $18K | ﹤0.01% |
820
-15
| -2% | -$398 |
|
|
DCPH
6995
PUT
DELISTED
Deciphera Pharmaceuticals, Inc. Common Stock
DCPH
| $18K | ﹤0.01% |
+1,100
| New | +$17.9K |
|
|
MIXT
6996
PUT
DELISTED
MIX TELEMATICS LIMITED
MIXT
| $18K | ﹤0.01% |
2,600
+600
| +30% | +$4.66K |
|
|
BFX
6997
PUT
DELISTED
BowFlex Inc.
BFX
| $18K | ﹤0.01% |
12,000
-4,600
| -28% | -$7.31K |
|
|
SURF
6998
CALL
DELISTED
Surface Oncology, Inc. Common Stock
SURF
| $18K | ﹤0.01% |
22,500
-100
| -0.4% | -$99 |
|
|
VLTA
6999
CALL
DELISTED
Volta Inc.
VLTA
| $18K | ﹤0.01% |
50,700
+31,500
| +164% | +$23.9K |
|
|
HYRE
7000
CALL
DELISTED
HyreCar Inc. Common Stock
HYRE
| $18K | ﹤0.01% |
43,500
-700
| -2% | -$442 |
|
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.