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 | |
|---|---|---|---|---|---|---|
2501
CALL
iRhythm Holdings
IRTC
$3.59B
| $964K | ﹤0.01% |
10,300
-5,600
| -35% | -$610K |
|
2502
CALL
MasTec
MTZ
$26.7B
| $964K | ﹤0.01% |
11,300
+6,000
| +113% | +$492K |
|
2503
CALL
TE Connectivity
TEL
$58.8B
| $964K | ﹤0.01% |
8,400
-300
| -3% | -$35.6K |
|
2504
PUT
AES
AES
$10.6B
| $963K | ﹤0.01% |
33,500
-116,700
| -78% | -$3.15M |
|
2505
CALL
Waters Corp
WAT
$36.8B
| $959K | ﹤0.01% |
+2,800
| New | +$886K |
|
|
DCH
2506
PUT
Dauch Corp
DCH
$1.3B
| $957K | ﹤0.01% |
122,500
-103,100
| -46% | -$924K |
|
2507
PUT
Dycom Industries
DY
$12.9B
| $954K | ﹤0.01% |
10,200
+10,000
| +5,000% | +$1.01M |
|
2508
CALL
Vail Resorts
MTN
$5.19B
| $953K | ﹤0.01% |
4,000
-12,200
| -75% | -$2.86M |
|
2509
PUT
ZTO Express
ZTO
$18.2B
| $953K | ﹤0.01% |
35,500
-8,200
| -19% | -$188K |
|
|
TRVN
2510
CALL
DELISTED
Trevena, Inc.
TRVN
| $953K | ﹤0.01% |
26,668
+25,602
| +2,402% | +$2.13M |
|
2511
CALL
Advanced Energy
AEIS
$12.2B
| $952K | ﹤0.01% |
11,100
+9,400
| +553% | +$789K |
|
2512
Acadia Realty Trust
AKR
$2.99B
| $952K | ﹤0.01% |
66,398
+32,024
| +93% | +$453K |
|
2513
CALL
Aurinia Pharmaceuticals
AUPH
$1.97B
| $952K | ﹤0.01% |
220,500
-14,400
| -6% | -$83.6K |
|
2514
PUT
Franklin Resources
BEN
$16.9B
| $952K | ﹤0.01% |
36,100
-39,000
| -52% | -$969K |
|
2515
PUT
MarineMax
HZO
$800M
| $952K | ﹤0.01% |
30,500
+23,300
| +324% | +$732K |
|
2516
Cal-Maine
CALM
$4.28B
| $950K | ﹤0.01% |
+17,463
| New | +$1.01M |
|
2517
PUT
Gogo Inc
GOGO
$515M
| $950K | ﹤0.01% |
64,400
-28,400
| -31% | -$410K |
|
2518
CALL
Revolve Group
RVLV
$1.79B
| $948K | ﹤0.01% |
42,600
-1,500
| -3% | -$36K |
|
2519
CALL
XP
XP
$8.62B
| $946K | ﹤0.01% |
61,700
+2,200
| +4% | +$38.5K |
|
|
HUT
2520
CALL
Hut 8
HUT
$12.4B
| $945K | ﹤0.01% |
222,460
-48,020
| -18% | -$362K |
|
|
BRT
2521
CALL
BRT Apartments
BRT
$282M
| $944K | ﹤0.01% |
48,100
-2,500
| -5% | -$51.3K |
|
2522
CALL
Golub Capital BDC
GBDC
$3.33B
| $944K | ﹤0.01% |
71,800
-700
| -1% | -$9.23K |
|
2523
Cognyte Software
CGNT
$612M
| $943K | ﹤0.01% |
303,381
+283,230
| +1,406% | +$832K |
|
2524
PUT
DXC Technology
DXC
$1.63B
| $943K | ﹤0.01% |
35,600
-15,900
| -31% | -$442K |
|
2525
CALL
West Pharmaceutical
WST
$23.1B
| $941K | ﹤0.01% |
4,000
| – | – |
|
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.