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 | |
|---|---|---|---|---|---|---|
2901
CALL
Mirion Technologies
MIR
$4.05B
| $656K | ﹤0.01% |
99,300
-26,300
| -21% | -$177K |
|
2902
CALL
Service Corp International
SCI
$11.5B
| $656K | ﹤0.01% |
9,500
-3,800
| -29% | -$253K |
|
|
CINC
2903
PUT
DELISTED
CinCor Pharma, Inc. Common Stock
CINC
| $655K | ﹤0.01% |
53,300
+49,800
| +1,423% | +$1.19M |
|
|
STOR
2904
DELISTED
STORE Capital Corporation
STOR
| $655K | ﹤0.01% |
20,437
+14,499
| +244% | +$460K |
|
2905
GrowGeneration
GRWG
$90.1M
| $654K | ﹤0.01% |
166,917
+145,161
| +667% | +$692K |
|
2906
CALL
NNN REIT
NNN
$9.38B
| $654K | ﹤0.01% |
14,300
-7,200
| -33% | -$313K |
|
2907
RB Global
RBA
$21.5B
| $653K | ﹤0.01% |
+11,293
| New | +$658K |
|
|
CRON
2908
Cronos Group
CRON
$1.06B
| $649K | ﹤0.01% |
255,834
-229,578
| -47% | -$673K |
|
2909
PUT
Lattice Semiconductor
LSCC
$16.4B
| $648K | ﹤0.01% |
10,000
-48,800
| -83% | -$2.94M |
|
2910
Prudential Financial
PRU
$42B
| $648K | ﹤0.01% |
6,521
-71,469
| -92% | -$7.24M |
|
2911
United States Copper Index Fund
CPER
$747M
| $647K | ﹤0.01% |
28,058
+3,953
| +16% | +$86.8K |
|
|
CAMP
2912
DELISTED
CalAmp Corp.
CAMP
| $645K | ﹤0.01% |
6,268
-1,038
| -14% | -$87.7K |
|
2913
Aegon
AEG
$13.5B
| $644K | ﹤0.01% |
127,791
+20,309
| +19% | +$94.1K |
|
|
ETNB
2914
CALL
DELISTED
89bio
ETNB
| $644K | ﹤0.01% |
50,600
-106,300
| -68% | -$956K |
|
2915
CALL
Imperial Oil
IMO
$60.6B
| $643K | ﹤0.01% |
13,200
+10,900
| +474% | +$562K |
|
2916
PUT
LendingTree
TREE
$559M
| $642K | ﹤0.01% |
30,100
+28,400
| +1,671% | +$647K |
|
2917
PUT
MillerKnoll
MLKN
$1.53B
| $640K | ﹤0.01% |
30,500
+30,200
| +10,067% | +$604K |
|
2918
PUT
USA Compression Partners
USAC
$3.73B
| $640K | ﹤0.01% |
32,800
-7,900
| -19% | -$146K |
|
2919
CALL
Sabesp
SBS
$19.8B
| $639K | ﹤0.01% |
309,391
+205,745
| +199% | +$435K |
|
2920
CALL
Bally's
BALY
$686M
| $637K | ﹤0.01% |
32,900
+31,200
| +1,835% | +$685K |
|
2921
PUT
Radiant Logistics
RLGT
$414M
| $637K | ﹤0.01% |
125,300
+103,900
| +486% | +$583K |
|
2922
PUT
Church & Dwight Co
CHD
$23.4B
| $636K | ﹤0.01% |
7,900
+4,000
| +103% | +$307K |
|
2923
CALL
Century Communities
CCS
$2.04B
| $635K | ﹤0.01% |
12,700
+7,700
| +154% | +$364K |
|
2924
CALL
FTAI Aviation
FTAI
$21.6B
| $634K | ﹤0.01% |
49,800
-21,400
| -30% | -$359K |
|
2925
CALL
Alliant Energy
LNT
$19.1B
| $634K | ﹤0.01% |
11,500
+400
| +4% | +$21.4K |
|
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.