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 | |
|---|---|---|---|---|---|---|
2926
CALL
Magnachip Semiconductor
MX
$126M
| $634K | ﹤0.01% |
67,600
-12,100
| -15% | -$117K |
|
|
VRNA
2927
PUT
DELISTED
Verona Pharma
VRNA
| $634K | ﹤0.01% |
24,300
+23,900
| +5,975% | +$318K |
|
|
PACW
2928
PUT
DELISTED
PacWest Bancorp
PACW
| $633K | ﹤0.01% |
27,600
+26,800
| +3,350% | +$650K |
|
2929
PUT
Progyny
PGNY
$2.49B
| $632K | ﹤0.01% |
20,300
+18,300
| +915% | +$662K |
|
|
BLUE
2930
CALL
DELISTED
bluebird bio
BLUE
| $631K | ﹤0.01% |
4,875
+2,620
| +116% | +$369K |
|
|
AY
2931
CALL
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $631K | ﹤0.01% |
24,400
-22,800
| -48% | -$616K |
|
|
LEV
2932
CALL
DELISTED
The Lion Electric Company
LEV
| $631K | ﹤0.01% |
281,700
+221,300
| +366% | +$598K |
|
2933
CALL
Alamos Gold
AGI
$12.5B
| $630K | ﹤0.01% |
62,400
-7,700
| -11% | -$67.8K |
|
2934
PUT
Sphere Entertainment
SPHR
$4.99B
| $629K | ﹤0.01% |
14,000
+8,000
| +133% | +$362K |
|
2935
PUT
Bio-Techne
TECH
$11.2B
| $629K | ﹤0.01% |
7,600
-1,200
| -14% | -$95.3K |
|
|
VSXY
2936
PUT
Victoria's Secret
VSXY
$6.81B
| $629K | ﹤0.01% |
17,600
-23,700
| -57% | -$942K |
|
2937
PUT
Northern Oil and Gas
NOG
$2.22B
| $628K | ﹤0.01% |
20,400
+6,500
| +47% | +$219K |
|
|
ODP
2938
CALL
DELISTED
ODP
ODP
| $628K | ﹤0.01% |
13,800
+10,500
| +318% | +$448K |
|
2939
Rio Tinto
RIO
$150B
| $627K | ﹤0.01% |
8,809
-9,894
| -53% | -$621K |
|
2940
Shoals Technologies Group
SHLS
$1.54B
| $626K | ﹤0.01% |
+25,408
| New | +$613K |
|
2941
Sally Beauty Holdings
SBH
$1.44B
| $625K | ﹤0.01% |
49,924
+43,396
| +665% | +$533K |
|
2942
PUT
Fastenal
FAST
$54.5B
| $624K | ﹤0.01% |
26,400
+2,200
| +9% | +$53.8K |
|
|
IAA
2943
PUT
DELISTED
IAA, Inc. Common Stock
IAA
| $624K | ﹤0.01% |
15,600
-44,800
| -74% | -$1.69M |
|
2944
PUT
Expeditors International
EXPD
$22.4B
| $623K | ﹤0.01% |
6,000
-9,700
| -62% | -$1,000K |
|
2945
CALL
The Greenbrier Companies
GBX
$1.56B
| $623K | ﹤0.01% |
18,600
+8,300
| +81% | +$276K |
|
2946
PUT
Cactus
WHD
$3.75B
| $623K | ﹤0.01% |
12,400
+700
| +6% | +$35.1K |
|
2947
PUT
Alpha Pro Tech
APT
$51.6M
| $621K | ﹤0.01% |
154,500
-86,400
| -36% | -$352K |
|
2948
Equinox Gold
EQX
$7.52B
| $618K | ﹤0.01% |
188,476
+125,461
| +199% | +$433K |
|
2949
CALL
Aspen Aerogels
ASPN
$388M
| $617K | ﹤0.01% |
52,400
+10,500
| +25% | +$120K |
|
2950
CALL
PetMed Express
PETS
$42.1M
| $617K | ﹤0.01% |
34,900
-21,600
| -38% | -$429K |
|
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.