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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5926
Mirum Pharmaceuticals
MIRM
$6.46B
| $72K | ﹤0.01% |
2,887
-3,140
| -52% | -$86.3K |
|
|
NGD
5927
CALL
DELISTED
New Gold Inc
NGD
| $72K | ﹤0.01% |
42,400
-189,200
| -82% | -$258K |
|
5928
Seanergy Maritime Holdings
SHIP
$379M
| $72K | ﹤0.01% |
8,352
-9,605
| -53% | -$76.4K |
|
5929
CALL
Towne Bank
TOWN
$3.46B
| $72K | ﹤0.01% |
2,600
-15,100
| -85% | -$419K |
|
|
UDMY
5930
PUT
DELISTED
Udemy
UDMY
| $72K | ﹤0.01% |
6,600
| – | – |
|
|
AMWD
5931
PUT
DELISTED
American Woodmark
AMWD
| $71K | ﹤0.01% |
700
+600
| +600% | +$56.5K |
|
5932
Actinium Pharmaceuticals
ATNM
$26.3M
| $71K | ﹤0.01% |
9,071
-8,018
| -47% | -$51.5K |
|
5933
Brookfield Infrastructure
BIPC
$5.2B
| $71K | ﹤0.01% |
1,971
+1,842
| +1,428% | +$64.5K |
|
5934
PUT
Great Southern Bancorp
GSBC
$874M
| $71K | ﹤0.01% |
1,300
| – | – |
|
|
OPI
5935
PUT
DELISTED
Office Properties Income Trust
OPI
| $71K | ﹤0.01% |
35,200
+25,400
| +259% | +$87.3K |
|
5936
Protara Therapeutics
TARA
$220M
| $71K | ﹤0.01% |
+17,850
| New | +$57.6K |
|
5937
Tradr TSLA Bear Daily ETF
TSLQ
$143M
| $71K | ﹤0.01% |
+103
| New | +$65.5K |
|
|
VTYX
5938
DELISTED
Ventyx Biosciences
VTYX
| $71K | ﹤0.01% |
13,044
+941
| +8% | +$4.3K |
|
|
CCEC
5939
PUT
Capital Clean Energy Carriers
CCEC
$1.34B
| $71K | ﹤0.01% |
+4,100
| New | +$72.1K |
|
5940
PUT
Aaon
AAON
$7.3B
| $70K | ﹤0.01% |
800
-20,200
| -96% | -$1.58M |
|
5941
PUT
Agios Pharmaceuticals
AGIO
$1.79B
| $70K | ﹤0.01% |
2,400
+2,300
| +2,300% | +$61.6K |
|
|
ASRT
5942
CALL
DELISTED
Assertio
ASRT
| $70K | ﹤0.01% |
4,927
-11,493
| -70% | -$157K |
|
5943
CALL
BioLife Solutions
BLFS
$1.53B
| $70K | ﹤0.01% |
3,800
-100
| -3% | -$1.75K |
|
5944
CALL
Domo
DOMO
$174M
| $70K | ﹤0.01% |
7,900
-1,700
| -18% | -$17.7K |
|
|
HI
5945
CALL
DELISTED
Hillenbrand
HI
| $70K | ﹤0.01% |
1,400
-2,700
| -66% | -$127K |
|
5946
PUT
Magnachip Semiconductor
MX
$119M
| $70K | ﹤0.01% |
+12,600
| New | +$80.6K |
|
5947
PUT
Walker & Dunlop
WD
$1.71B
| $70K | ﹤0.01% |
700
-3,000
| -81% | -$288K |
|
5948
PUT
Compañía de Minas Buenaventura
BVN
$7.69B
| $69K | ﹤0.01% |
4,400
+900
| +26% | +$14K |
|
5949
Chegg
CHGG
$110M
| $69K | ﹤0.01% |
+9,129
| New | +$83.6K |
|
|
CRESY
5950
Cresud
CRESY
$795M
| $69K | ﹤0.01% |
7,829
-36,773
| -82% | -$312K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.