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 | |
|---|---|---|---|---|---|---|
6901
PUT
DMC Global
BOOM
$138M
| $19K | ﹤0.01% |
1,000
-1,200
| -55% | -$22.2K |
|
6902
CALL
Brilliant Earth
BRLT
$17.1M
| $19K | ﹤0.01% |
4,600
-1,300
| -22% | -$7.78K |
|
6903
PUT
Byrna Technologies
BYRN
$103M
| $19K | ﹤0.01% |
2,500
| – | – |
|
6904
Invesco MSCI Global Timber ETF
CUT
$32.8M
| $19K | ﹤0.01% |
652
-981
| -60% | -$29.8K |
|
6905
PUT
Dynagas LNG Partners
DLNG
$132M
| $19K | ﹤0.01% |
7,400
-10,600
| -59% | -$30.5K |
|
6906
Guardant Health
GH
$21.7B
| $19K | ﹤0.01% |
722
-73,595
| -99% | -$3.37M |
|
6907
CALL
IDT Corp
IDT
$1.64B
| $19K | ﹤0.01% |
700
-2,100
| -75% | -$56.3K |
|
6908
iShares US Pharmaceuticals ETF
IHE
$1.46B
| $19K | ﹤0.01% |
+309
| New | +$18.6K |
|
6909
KraneShares Bosera MSCI China A 50 Connect Index ETF
KBA
$147M
| $19K | ﹤0.01% |
774
-8,925
| -92% | -$260K |
|
|
MRCC
6910
CALL
DELISTED
Monroe Capital Corp
MRCC
| $19K | ﹤0.01% |
2,300
+1,700
| +283% | +$13.9K |
|
|
MVO
6911
CALL
DELISTED
MV Oil Trust
MVO
| $19K | ﹤0.01% |
1,200
-1,500
| -56% | -$20.3K |
|
6912
PUT
NiSource
NI
$21.3B
| $19K | ﹤0.01% |
+700
| New | +$18.4K |
|
|
ODP
6913
DELISTED
ODP
ODP
| $19K | ﹤0.01% |
+432
| New | +$18.4K |
|
6914
PUT
Pampa Energía
PAM
$4.75B
| $19K | ﹤0.01% |
600
+100
| +20% | +$2.61K |
|
|
PDM
6915
PUT
Piedmont Realty Trust
PDM
$1.21B
| $19K | ﹤0.01% |
+2,100
| New | +$20.7K |
|
|
PINE
6916
CALL
Alpine Income Property Trust
PINE
$333M
| $19K | ﹤0.01% |
1,000
+100
| +11% | +$1.81K |
|
6917
Purple Innovation
PRPL
$35.3M
| $19K | ﹤0.01% |
+161
| New | +$17.6K |
|
6918
Pricesmart
PSMT
$5.98B
| $19K | ﹤0.01% |
+329
| New | +$21.5K |
|
6919
CALL
Radian Group
RDN
$5.18B
| $19K | ﹤0.01% |
1,000
-25,700
| -96% | -$500K |
|
6920
Direxion Daily Retail Bull 3X ETF
RETL
$30.8M
| $19K | ﹤0.01% |
2,865
-3,722
| -57% | -$28.9K |
|
6921
CALL
Rafael Holdings
RFL
$101M
| $19K | ﹤0.01% |
10,647
-6,997
| -40% | -$12.8K |
|
6922
PUT
RPM International
RPM
$13.7B
| $19K | ﹤0.01% |
200
-300
| -60% | -$29.1K |
|
|
SKE
6923
PUT
Skeena Resources
SKE
$3.3B
| $19K | ﹤0.01% |
3,700
-400
| -10% | -$2.03K |
|
6924
CALL
Synaptics
SYNA
$4.19B
| $19K | ﹤0.01% |
200
-3,300
| -94% | -$317K |
|
|
TOUR
6925
Tuniu
TOUR
$53.9M
| $19K | ﹤0.01% |
+1,270
| New | +$14K |
|
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.