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 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2451
CALL
Dave & Buster's
PLAY
$343M
| $1.81M | ﹤0.01% |
33,700
-39,100
| -54% | -$1.58M |
|
2452
PUT
Liberty Broadband Class C
LBRDK
$4.15B
| $1.81M | ﹤0.01% |
22,500
+21,300
| +1,775% | +$1.79M |
|
2453
PUT
Entergy
ETR
$54.1B
| $1.81M | ﹤0.01% |
35,800
-3,400
| -9% | -$166K |
|
2454
PUT
Albertsons Companies
ACI
$5.4B
| $1.81M | ﹤0.01% |
78,700
-7,500
| -9% | -$166K |
|
2455
PUT
FTAI Aviation
FTAI
$22.2B
| $1.81M | ﹤0.01% |
39,000
+15,300
| +65% | +$611K |
|
2456
PUT
Crane NXT
CXT
$3.04B
| $1.8M | ﹤0.01% |
+31,600
| New | +$1.68M |
|
2457
PUT
Enbridge
ENB
$124B
| $1.8M | ﹤0.01% |
49,900
-59,000
| -54% | -$1.99M |
|
2458
CALL
Boston Beer
SAM
$1.88B
| $1.8M | ﹤0.01% |
5,200
-6,800
| -57% | -$2.38M |
|
2459
Lockheed Martin
LMT
$134B
| $1.79M | ﹤0.01% |
+3,946
| New | +$1.75M |
|
2460
PUT
New York Times
NYT
$11.6B
| $1.79M | ﹤0.01% |
36,500
+16,000
| +78% | +$706K |
|
2461
CALL
Bumble
BMBL
$367M
| $1.79M | ﹤0.01% |
121,200
+19,000
| +19% | +$270K |
|
2462
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $1.78M | ﹤0.01% |
17,500
-16,600
| -49% | -$1.65M |
|
2463
PUT
Gen Digital
GEN
$15.6B
| $1.78M | ﹤0.01% |
78,100
+44,000
| +129% | +$872K |
|
|
HOLI
2464
PUT
DELISTED
Hollsys Automation Technologies INTERNATIONAL, LTD. COMMON (British Virgin Island)
HOLI
| $1.78M | ﹤0.01% |
67,600
+10,300
| +18% | +$231K |
|
2465
CALL
HDFC Bank
HDB
$119B
| $1.77M | ﹤0.01% |
52,800
+28,000
| +113% | +$845K |
|
2466
PUT
Golar LNG
GLNG
$4.95B
| $1.77M | ﹤0.01% |
76,900
+12,400
| +19% | +$278K |
|
2467
CALL
Trimble
TRMB
$12.3B
| $1.77M | ﹤0.01% |
33,200
+16,300
| +96% | +$777K |
|
2468
PUT
Amylyx Pharmaceuticals
AMLX
$2.05B
| $1.76M | ﹤0.01% |
119,800
+2,300
| +2% | +$35.3K |
|
2469
CALL
Chord Energy
CHRD
$7.79B
| $1.76M | ﹤0.01% |
10,600
+5,500
| +108% | +$899K |
|
2470
Insulet
PODD
$11.3B
| $1.76M | ﹤0.01% |
+8,117
| New | +$1.39M |
|
|
LSXMK
2471
DELISTED
Liberty Media Corporation Series C Liberty SiriusXM Common Stock
LSXMK
| $1.76M | ﹤0.01% |
61,217
+33,291
| +119% | +$873K |
|
2472
PUT
Incyte
INCY
$23.5B
| $1.76M | ﹤0.01% |
28,000
-22,700
| -45% | -$1.28M |
|
2473
CALL
ICICI Bank
IBN
$106B
| $1.76M | ﹤0.01% |
73,700
+8,400
| +13% | +$193K |
|
2474
Icahn Enterprises
IEP
$5.17B
| $1.75M | ﹤0.01% |
+102,125
| New | +$1.79M |
|
2475
CALL
Acushnet Holdings
GOLF
$6.13B
| $1.75M | ﹤0.01% |
27,700
+27,100
| +4,517% | +$1.52M |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.