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 | |
|---|---|---|---|---|---|---|
|
SRG
2251
CALL
Seritage Growth Properties
SRG
$130M
| $1.27M | ﹤0.01% |
107,100
-21,000
| -16% | -$233K |
|
2252
PUT
Invesco
IVZ
$13.3B
| $1.26M | ﹤0.01% |
70,300
-15,600
| -18% | -$267K |
|
2253
Axsome Therapeutics
AXSM
$12.4B
| $1.26M | ﹤0.01% |
16,362
-21,689
| -57% | -$1.3M |
|
2254
CALL
United Parks & Resorts
PRKS
$2.11B
| $1.26M | ﹤0.01% |
23,600
-10,300
| -30% | -$552K |
|
2255
PUT
DoubleVerify
DV
$1.62B
| $1.26M | ﹤0.01% |
57,400
+56,400
| +5,640% | +$1.47M |
|
2256
PUT
Danaos Corp
DAC
$2.55B
| $1.26M | ﹤0.01% |
23,900
-34,700
| -59% | -$1.95M |
|
|
MAXN
2257
CALL
DELISTED
Maxeon Solar Technologies
MAXN
| $1.26M | ﹤0.01% |
783
+123
| +19% | +$243K |
|
2258
PUT
Lakeland Industries
LAKE
$106M
| $1.26M | ﹤0.01% |
94,500
+34,600
| +58% | +$438K |
|
|
2259
Invesco
IVZ
$13.3B
| $1.25M | ﹤0.01% |
69,669
-4,436
| -6% | -$75.9K |
|
2260
PUT
United States Copper Index Fund
CPER
$742M
| $1.25M | ﹤0.01% |
54,100
-29,600
| -35% | -$650K |
|
2261
Nabors Industries
NBR
$1.23B
| $1.24M | ﹤0.01% |
8,037
+5,514
| +219% | +$823K |
|
|
TRTN
2262
CALL
DELISTED
Triton International Limited
TRTN
| $1.24M | ﹤0.01% |
18,100
-3,100
| -15% | -$196K |
|
|
DQ
2263
Daqo New Energy
DQ
$790M
| $1.24M | ﹤0.01% |
32,126
+21,564
| +204% | +$1.06M |
|
2264
Pacific Biosciences
PACB
$422M
| $1.24M | ﹤0.01% |
+151,610
| New | +$1.31M |
|
2265
CALL
FNB Corp
FNB
$6.78B
| $1.24M | ﹤0.01% |
95,000
+60,100
| +172% | +$805K |
|
2266
CALL
Teledyne Technologies
TDY
$30.4B
| $1.24M | ﹤0.01% |
3,100
+2,800
| +933% | +$1.09M |
|
|
WOW
2267
CALL
DELISTED
WideOpenWest
WOW
| $1.24M | ﹤0.01% |
135,900
+108,800
| +401% | +$1.23M |
|
2268
CALL
Arrowhead Research
ARWR
$12.1B
| $1.24M | ﹤0.01% |
30,500
+13,000
| +74% | +$431K |
|
2269
CALL
Xometry
XMTR
$4.77B
| $1.24M | ﹤0.01% |
38,400
+10,800
| +39% | +$504K |
|
2270
PUT
Copart
CPRT
$25.9B
| $1.24M | ﹤0.01% |
40,600
-76,200
| -65% | -$2.28M |
|
2271
Franklin Resources
BEN
$16.9B
| $1.24M | ﹤0.01% |
46,819
-14,747
| -24% | -$366K |
|
2272
PUT
AbCellera Biologics
ABCL
$1.62B
| $1.23M | ﹤0.01% |
121,900
-48,600
| -29% | -$561K |
|
2273
PUT
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.15B
| $1.23M | ﹤0.01% |
11,900
-25,500
| -68% | -$1.52M |
|
2274
PUT
Leonardo DRS
DRS
$12.8B
| $1.23M | ﹤0.01% |
+96,400
| New | +$1.12M |
|
2275
PUT
Life Time Group Holdings
LTH
$9.42B
| $1.23M | ﹤0.01% |
103,000
+101,900
| +9,264% | +$1.16M |
|
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.