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 | |
|---|---|---|---|---|---|---|
5851
PUT
Aterian
ATER
$4.45M
| $51K | ﹤0.01% |
5,525
-3,183
| -37% | -$39.9K |
|
|
BRT
5852
PUT
BRT Apartments
BRT
$281M
| $51K | ﹤0.01% |
2,600
+600
| +30% | +$12.3K |
|
5853
CALL
Chemed
CHE
$7.07B
| $51K | ﹤0.01% |
100
-600
| -86% | -$292K |
|
5854
Century Casinos
CNTY
$34M
| $51K | ﹤0.01% |
7,396
+6,313
| +583% | +$46.2K |
|
5855
Traeger
COOK
$178M
| $51K | ﹤0.01% |
+364
| New | +$60.9K |
|
5856
CALL
Cheniere Energy
CQP
$31.9B
| $51K | ﹤0.01% |
900
-8,800
| -91% | -$504K |
|
5857
CALL
Carpenter Technology
CRS
$25.8B
| $51K | ﹤0.01% |
1,400
-22,800
| -94% | -$868K |
|
5858
CALL
Evolus
EOLS
$385M
| $51K | ﹤0.01% |
6,900
-8,900
| -56% | -$68.9K |
|
5859
CALL
Fabrinet
FN
$15.6B
| $51K | ﹤0.01% |
400
-1,900
| -83% | -$227K |
|
5860
CALL
Globus Medical
GMED
$10.7B
| $51K | ﹤0.01% |
700
-2,700
| -79% | -$184K |
|
5861
PUT
Immunocore
IMCR
$1.72B
| $51K | ﹤0.01% |
900
-4,600
| -84% | -$259K |
|
|
LGO
5862
CALL
Largo
LGO
$59.8M
| $51K | ﹤0.01% |
9,500
+5,100
| +116% | +$28.1K |
|
5863
CALL
LivePerson
LPSN
$21.8M
| $51K | ﹤0.01% |
340
-4,527
| -93% | -$725K |
|
5864
CALL
Marcus Corp
MCS
$897M
| $51K | ﹤0.01% |
3,600
-9,500
| -73% | -$144K |
|
5865
PUT
NexGen Energy
NXE
$6.06B
| $51K | ﹤0.01% |
11,600
-13,100
| -53% | -$54.6K |
|
5866
OneWater Marine
ONEW
$204M
| $51K | ﹤0.01% |
1,794
+1,627
| +974% | +$50.8K |
|
5867
CALL
Packaging Corp of America
PKG
$21.9B
| $51K | ﹤0.01% |
400
-13,900
| -97% | -$1.74M |
|
|
5868
PUT
Packaging Corp of America
PKG
$21.9B
| $51K | ﹤0.01% |
400
-2,900
| -88% | -$363K |
|
5869
PROG Holdings
PRG
$1.75B
| $51K | ﹤0.01% |
3,061
+881
| +40% | +$15K |
|
|
SA
5870
Seabridge Gold
SA
$2.78B
| $51K | ﹤0.01% |
4,065
-7,315
| -64% | -$86.6K |
|
5871
PUT
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.37B
| $51K | ﹤0.01% |
1,100
-5,900
| -84% | -$281K |
|
5872
PUT
Semtech
SMTC
$11B
| $51K | ﹤0.01% |
1,800
-3,000
| -63% | -$85.1K |
|
5873
CALL
Turkcell
TKC
$4.68B
| $51K | ﹤0.01% |
10,700
+4,200
| +65% | +$16.5K |
|
5874
PUT
Tootsie Roll Industries
TR
$2.93B
| $51K | ﹤0.01% |
1,351
-8,967
| -87% | -$327K |
|
|
UDMY
5875
PUT
DELISTED
Udemy
UDMY
| $51K | ﹤0.01% |
4,900
-149,300
| -97% | -$2.02M |
|
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.