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 | |
|---|---|---|---|---|---|---|
2851
CALL
Viasat
VSAT
$10B
| $689K | ﹤0.01% |
21,800
+16,900
| +345% | +$591K |
|
2852
CALL
BlackLine
BL
$1.81B
| $686K | ﹤0.01% |
10,200
+7,800
| +325% | +$484K |
|
2853
Alto Ingredients
ALTO
$349M
| $685K | ﹤0.01% |
238,145
+54,181
| +29% | +$193K |
|
2854
Nokia
NOK
$50.2B
| $684K | ﹤0.01% |
+147,457
| New | +$680K |
|
2855
PUT
Gerdau
GGB
$9.34B
| $683K | ﹤0.01% |
155,484
-119,952
| -44% | -$516K |
|
2856
CALL
Coursera
COUR
$1.61B
| $682K | ﹤0.01% |
57,700
-600
| -1% | -$7.57K |
|
2857
PUT
Middleby
MIDD
$6.08B
| $682K | ﹤0.01% |
5,100
-8,000
| -61% | -$1.09M |
|
2858
Tencent Music
TME
$15.3B
| $682K | ﹤0.01% |
82,448
-122,465
| -60% | -$688K |
|
2859
CALL
KBR
KBR
$4.68B
| $681K | ﹤0.01% |
12,900
+11,100
| +617% | +$553K |
|
2860
Samsara
IOT
$20.7B
| $679K | ﹤0.01% |
+54,628
| New | +$622K |
|
2861
CALL
Kinsale Capital Group
KNSL
$8.19B
| $679K | ﹤0.01% |
2,600
-3,900
| -60% | -$1.12M |
|
2862
CALL
Murphy Oil
MUR
$5.47B
| $679K | ﹤0.01% |
15,800
-6,600
| -29% | -$297K |
|
|
RAD
2863
CALL
DELISTED
Rite Aid Corporation
RAD
| $679K | ﹤0.01% |
203,500
-33,300
| -14% | -$158K |
|
2864
Costamare
CMRE
$1.91B
| $678K | ﹤0.01% |
73,105
+58,798
| +411% | +$552K |
|
2865
PUT
GDS Holdings
GDS
$6.23B
| $678K | ﹤0.01% |
32,900
-157,200
| -83% | -$2.41M |
|
2866
CALL
Iridium Communications
IRDM
$4.83B
| $678K | ﹤0.01% |
13,200
-11,400
| -46% | -$572K |
|
2867
CALL
Methanex
MEOH
$4.17B
| $677K | ﹤0.01% |
17,900
+6,900
| +63% | +$253K |
|
2868
Labcorp
LH
$24.4B
| $676K | ﹤0.01% |
3,342
+2,812
| +531% | +$550K |
|
2869
PUT
XPO
XPO
$23.9B
| $676K | ﹤0.01% |
68,200
-40,522
| -37% | -$1.37M |
|
|
AJRD
2870
CALL
DELISTED
Aerojet Rocketdyne Holdings
AJRD
| $676K | ﹤0.01% |
12,100
+8,700
| +256% | +$431K |
|
2871
CALL
Senseonics Holdings Inc
SENS
$260M
| $675K | ﹤0.01% |
32,815
-4,320
| -12% | -$99.7K |
|
|
DEN
2872
DELISTED
Denbury Inc.
DEN
| $673K | ﹤0.01% |
7,739
-2,646
| -25% | -$240K |
|
2873
Bain Capital Specialty
BCSF
$815M
| $672K | ﹤0.01% |
56,488
+29,930
| +113% | +$381K |
|
2874
CALL
BGC Group
BGC
$5.57B
| $672K | ﹤0.01% |
178,500
+14,700
| +9% | +$58K |
|
2875
ProShares UltraShort Euro
EUO
$35.7M
| $672K | ﹤0.01% |
+22,848
| New | +$737K |
|
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.