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 | |
|---|---|---|---|---|---|---|
6626
PUT
Byrna Technologies
BYRN
$103M
| $34K | ﹤0.01% |
+2,500
| New | +$24.2K |
|
6627
PUT
Consensus Cloud Solutions
CCSI
$657M
| $34K | ﹤0.01% |
2,200
+2,100
| +2,100% | +$37.6K |
|
6628
PUT
Carlyle Secured Lending
CGBD
$702M
| $34K | ﹤0.01% |
2,100
-100
| -5% | -$1.57K |
|
6629
PUT
Traeger
COOK
$171M
| $34K | ﹤0.01% |
270
+212
| +366% | +$24.1K |
|
6630
PUT
Capital Southwest
CSWC
$1.47B
| $34K | ﹤0.01% |
1,400
-2,900
| -67% | -$70.7K |
|
|
DSL
6631
PUT
DoubleLine Income Solutions Fund
DSL
$1.23B
| $34K | ﹤0.01% |
2,700
-1,600
| -37% | -$20.1K |
|
|
GRRR
6632
PUT
Gorilla Technology Group
GRRR
$318M
| $34K | ﹤0.01% |
+4,570
| New | +$33K |
|
6633
PUT
Innodata
INOD
$1.96B
| $34K | ﹤0.01% |
5,200
+500
| +11% | +$4.15K |
|
6634
Invivyd
IVVD
$171M
| $34K | ﹤0.01% |
+7,660
| New | +$31.6K |
|
6635
PUT
Kopin
KOPN
$663M
| $34K | ﹤0.01% |
+19,400
| New | +$43.1K |
|
|
LOMA
6636
Loma Negra
LOMA
$1.38B
| $34K | ﹤0.01% |
+5,170
| New | +$35K |
|
6637
Matthews International
MATW
$866M
| $34K | ﹤0.01% |
+1,099
| New | +$34K |
|
6638
Moelis & Co
MC
$5.08B
| $34K | ﹤0.01% |
+609
| New | +$33.3K |
|
6639
MiMedx Group
MDXG
$636M
| $34K | ﹤0.01% |
+4,436
| New | +$35.7K |
|
6640
PUT
Marcus & Millichap
MMI
$1.18B
| $34K | ﹤0.01% |
+1,000
| New | +$36.6K |
|
|
MRCC
6641
DELISTED
Monroe Capital Corp
MRCC
| $34K | ﹤0.01% |
+4,747
| New | +$34.4K |
|
|
OLPX
6642
CALL
DELISTED
Olaplex Holdings
OLPX
| $34K | ﹤0.01% |
+18,100
| New | +$37.7K |
|
6643
CALL
Otter Tail
OTTR
$3.75B
| $34K | ﹤0.01% |
400
-9,100
| -96% | -$791K |
|
6644
PUT
Pliant Therapeutics
PLRX
$65.6M
| $34K | ﹤0.01% |
2,300
+2,200
| +2,200% | +$36.3K |
|
6645
CALL
Sportsman's Warehouse
SPWH
$45.3M
| $34K | ﹤0.01% |
11,200
-2,400
| -18% | -$8.94K |
|
|
TERN
6646
PUT
DELISTED
Terns Pharmaceuticals
TERN
| $34K | ﹤0.01% |
5,200
+4,900
| +1,633% | +$32K |
|
6647
CALL
Tiptree Inc
TIPT
$655M
| $34K | ﹤0.01% |
+2,000
| New | +$35.9K |
|
6648
CALL
Telos
TLS
$324M
| $34K | ﹤0.01% |
8,200
-11,100
| -58% | -$44K |
|
|
ZYXI
6649
CALL
DELISTED
Zynex
ZYXI
| $34K | ﹤0.01% |
2,800
+200
| +8% | +$2.4K |
|
|
AKYA
6650
CALL
DELISTED
Akoya BioSciences
AKYA
| $33K | ﹤0.01% |
7,100
+2,300
| +48% | +$11.9K |
|
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.