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 | |
|---|---|---|---|---|---|---|
3926
PUT
Dime Commercial Bancshares
DCOM
$1.81B
| $466K | ﹤0.01% |
24,200
+13,700
| +130% | +$289K |
|
3927
CALL
Park Hotels & Resorts
PK
$3.07B
| $466K | ﹤0.01% |
26,700
+26,600
| +26,600% | +$431K |
|
3928
Bio-Techne
TECH
$11.2B
| $466K | ﹤0.01% |
+6,624
| New | +$474K |
|
3929
CALL
Neogen
NEOG
$2.01B
| $465K | ﹤0.01% |
29,500
-35,600
| -55% | -$596K |
|
3930
Sana Biotechnology
SANA
$899M
| $465K | ﹤0.01% |
46,516
+28,436
| +157% | +$213K |
|
|
LGF.B
3931
CALL
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $463K | ﹤0.01% |
46,900
-16,200
| -26% | -$150K |
|
3932
Gaotu Techedu
GOTU
$389M
| $462K | ﹤0.01% |
70,607
+36,289
| +106% | +$192K |
|
3933
Larimar Therapeutics
LRMR
$398M
| $462K | ﹤0.01% |
+60,900
| New | +$475K |
|
3934
PUT
SPS Commerce
SPSC
$2.55B
| $462K | ﹤0.01% |
+2,500
| New | +$461K |
|
3935
CALL
Bank of Hawaii
BOH
$3.16B
| $461K | ﹤0.01% |
7,400
-8,000
| -52% | -$507K |
|
3936
CALL
Healthpeak Properties
DOC
$15.8B
| $461K | ﹤0.01% |
24,600
+13,600
| +124% | +$247K |
|
3937
CALL
Navient
NAVI
$821M
| $461K | ﹤0.01% |
26,500
-7,700
| -23% | -$130K |
|
|
ALTM
3938
DELISTED
Arcadium Lithium plc
ALTM
| $461K | ﹤0.01% |
+106,966
| New | +$537K |
|
|
RCM
3939
DELISTED
R1 RCM Inc. Common Stock
RCM
| $461K | ﹤0.01% |
35,827
+34,895
| +3,744% | +$406K |
|
3940
CALL
Adient
ADNT
$1.71B
| $460K | ﹤0.01% |
14,000
-800
| -5% | -$27.2K |
|
|
JAMF
3941
CALL
DELISTED
Jamf
JAMF
| $460K | ﹤0.01% |
25,100
+24,100
| +2,410% | +$452K |
|
|
VZIO
3942
CALL
DELISTED
VIZIO Holding Corp.
VZIO
| $460K | ﹤0.01% |
42,100
+30,100
| +251% | +$276K |
|
3943
Anterix
ATEX
$1.74B
| $459K | ﹤0.01% |
13,667
+9,216
| +207% | +$310K |
|
3944
CrossAmerica Partners
CAPL
$842M
| $459K | ﹤0.01% |
20,178
+20,139
| +51,638% | +$454K |
|
3945
CALL
IMAX
IMAX
$2.57B
| $459K | ﹤0.01% |
28,400
+17,600
| +163% | +$267K |
|
3946
CALL
MACOM Technology Solutions
MTSI
$18.8B
| $459K | ﹤0.01% |
4,800
-7,500
| -61% | -$663K |
|
3947
Alta Equipment Group
ALTG
$206M
| $458K | ﹤0.01% |
35,434
+29,497
| +497% | +$339K |
|
3948
CALL
Pacer Trendpilot US Large Cap ETF
PTLC
$3.23B
| $457K | ﹤0.01% |
9,000
+7,500
| +500% | +$340K |
|
3949
PUT
Vanguard Dividend Appreciation ETF
VIG
$112B
| $456K | ﹤0.01% |
2,500
-18,000
| -88% | -$3.16M |
|
3950
Tilray
TLRY
$475M
| $454K | ﹤0.01% |
+18,395
| New | +$355K |
|
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.