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 | |
|---|---|---|---|---|---|---|
4651
CALL
Rayonier Advanced Materials
RYAM
$562M
| $142K | ﹤0.01% |
14,800
-2,400
| -14% | -$15.3K |
|
|
ASAI
4652
CALL
DELISTED
Sendas Distribuidora S.A. American Depositary Share (each representing five common shares)
ASAI
| $142K | ﹤0.01% |
+7,800
| New | +$143K |
|
4653
CALL
Dolby
DLB
$4.97B
| $141K | ﹤0.01% |
2,000
-4,500
| -69% | -$310K |
|
4654
Coca-Cola Femsa
KOF
$22.8B
| $141K | ﹤0.01% |
2,090
+1,903
| +1,018% | +$124K |
|
4655
PUT
Safe Bulkers
SB
$772M
| $141K | ﹤0.01% |
48,700
+35,000
| +255% | +$96.9K |
|
4656
Neuronetics
STIM
$127M
| $141K | ﹤0.01% |
20,529
+19,059
| +1,297% | +$90K |
|
4657
PUT
W&T Offshore
WTI
$525M
| $141K | ﹤0.01% |
25,300
-36,500
| -59% | -$251K |
|
4658
CALL
XWELL
XWEL
$8.95M
| $141K | ﹤0.01% |
19,500
+615
| +3% | +$6.81K |
|
4659
CALL
Aterian
ATER
$4.07M
| $140K | ﹤0.01% |
15,217
-4,566
| -23% | -$57.2K |
|
4660
Natural Resource Partners
NRP
$1.31B
| $140K | ﹤0.01% |
+2,588
| New | +$113K |
|
4661
PUT
Richardson Electronics
RELL
$244M
| $140K | ﹤0.01% |
6,600
+6,200
| +1,550% | +$140K |
|
4662
Rush Street Interactive
RSI
$3.17B
| $140K | ﹤0.01% |
39,264
-25,188
| -39% | -$93.4K |
|
4663
SFL Corp
SFL
$1.61B
| $140K | ﹤0.01% |
15,288
+7,026
| +85% | +$68.3K |
|
4664
State Street SPDR Portfolio S&P 1500 Composite Stock Market ETF
SPTM
$13.3B
| $140K | ﹤0.01% |
+2,964
| New | +$141K |
|
4665
CALL
TORM
TRMD
$3.05B
| $140K | ﹤0.01% |
4,800
+4,000
| +500% | +$108K |
|
4666
CALL
Voyager Therapeutics
VYGR
$181M
| $140K | ﹤0.01% |
23,100
-155,800
| -87% | -$885K |
|
|
SCPL
4667
DELISTED
SciPlay Corporation Class A Common Stock
SCPL
| $140K | ﹤0.01% |
8,768
+1,971
| +29% | +$28.6K |
|
4668
CALL
BioXcel Therapeutics
BTAI
$24.8M
| $139K | ﹤0.01% |
406
-819
| -67% | -$198K |
|
4669
CALL
Dana Inc
DAN
$2.88B
| $139K | ﹤0.01% |
9,200
-13,700
| -60% | -$213K |
|
4670
DarioHealth
DRIO
$69.2M
| $139K | ﹤0.01% |
1,632
-905
| -36% | -$81.5K |
|
4671
Fidelity MSCI Energy Index ETF
FENY
$1.97B
| $139K | ﹤0.01% |
+5,845
| New | +$139K |
|
4672
CALL
Haleon
HLN
$45.3B
| $139K | ﹤0.01% |
17,400
-3,600
| -17% | -$24.5K |
|
4673
CALL
Lakeland Industries
LAKE
$108M
| $139K | ﹤0.01% |
10,500
-4,300
| -29% | -$54.4K |
|
4674
CALL
Lifestance Health
LFST
$4.15B
| $139K | ﹤0.01% |
28,200
+25,900
| +1,126% | +$160K |
|
4675
CALL
RCI Hospitality Holdings
RICK
$202M
| $139K | ﹤0.01% |
1,500
-4,100
| -73% | -$342K |
|
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.