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 | |
|---|---|---|---|---|---|---|
4051
ProShares UltraPro Short Russell2000
SRTY
$81.4M
| $230K | ﹤0.01% |
1,066
-632
| -37% | -$136K |
|
4052
PUT
GrowGeneration
GRWG
$85.9M
| $229K | ﹤0.01% |
58,600
+32,900
| +128% | +$157K |
|
|
LAND
4053
CALL
Gladstone Land Corp
LAND
$366M
| $229K | ﹤0.01% |
12,500
+1,800
| +17% | +$35.1K |
|
4054
CALL
NMI Holdings
NMIH
$3.39B
| $229K | ﹤0.01% |
11,000
+9,600
| +686% | +$201K |
|
4055
PUT
Qiagen
QGEN
$8.69B
| $229K | ﹤0.01% |
4,338
-30,649
| -88% | -$1.51M |
|
|
LENZ
4056
PUT
LENZ Therapeutics
LENZ
$178M
| $229K | ﹤0.01% |
9,871
| – | – |
|
|
MGI
4057
PUT
DELISTED
MoneyGram International, Inc. New
MGI
| $229K | ﹤0.01% |
21,100
+19,200
| +1,011% | +$205K |
|
4058
PUT
Atomera
ATOM
$175M
| $228K | ﹤0.01% |
36,800
+2,500
| +7% | +$20.5K |
|
4059
CALL
Brookfield Renewable
BEP
$9.56B
| $228K | ﹤0.01% |
9,000
+2,400
| +36% | +$68.5K |
|
4060
CALL
eHealth
EHTH
$42.2M
| $228K | ﹤0.01% |
47,200
+2,400
| +5% | +$8.95K |
|
4061
CALL
JFrog
FROG
$8.94B
| $228K | ﹤0.01% |
10,700
-3,500
| -25% | -$79.5K |
|
|
JBGS
4062
JBG SMITH
JBGS
$857M
| $228K | ﹤0.01% |
12,017
+11,929
| +13,556% | +$230K |
|
|
MITT
4063
PUT
TPG Mortgage Investment Trust
MITT
$229M
| $228K | ﹤0.01% |
43,600
-3,700
| -8% | -$19.1K |
|
4064
PUT
NNN REIT
NNN
$9.38B
| $228K | ﹤0.01% |
5,000
-7,500
| -60% | -$326K |
|
|
RENT
4065
PUT
Rent the Runway
RENT
$120M
| $228K | ﹤0.01% |
3,750
+3,330
| +793% | +$135K |
|
4066
PUT
Sun Communities
SUI
$15.5B
| $228K | ﹤0.01% |
1,600
-2,200
| -58% | -$300K |
|
4067
Extreme Networks
EXTR
$3.8B
| $227K | ﹤0.01% |
12,439
+1,562
| +14% | +$27.4K |
|
4068
CALL
Katapult Holdings
KPLT
$31.4M
| $227K | ﹤0.01% |
9,496
-1,864
| -16% | -$44.5K |
|
4069
CALL
Middleby
MIDD
$5.96B
| $227K | ﹤0.01% |
1,700
-3,600
| -68% | -$490K |
|
4070
NatWest
NWG
$70B
| $227K | ﹤0.01% |
35,292
+8,937
| +34% | +$52.4K |
|
4071
Arcos Dorados Holdings
ARCO
$1.76B
| $226K | ﹤0.01% |
+27,079
| New | +$203K |
|
|
AGNT
4072
CALL
AGNT Inc
AGNT
$639M
| $226K | ﹤0.01% |
20,400
-35,000
| -63% | -$424K |
|
4073
Mobileye
MBLY
$2.03B
| $226K | ﹤0.01% |
+6,464
| New | +$196K |
|
|
VGR
4074
CALL
DELISTED
Vector Group Ltd.
VGR
| $226K | ﹤0.01% |
19,100
-16,700
| -47% | -$176K |
|
|
GPP
4075
PUT
DELISTED
Green Plains Partners LP
GPP
| $226K | ﹤0.01% |
+17,500
| New | +$218K |
|
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.