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 | |
|---|---|---|---|---|---|---|
|
LGF.B
3401
CALL
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $673K | ﹤0.01% |
63,100
-73,300
| -54% | -$628K |
|
3402
CALL
Beam Therapeutics
BEAM
$2.58B
| $672K | ﹤0.01% |
24,700
+13,000
| +111% | +$323K |
|
3403
Diageo
DEO
$47.3B
| $672K | ﹤0.01% |
+4,618
| New | +$682K |
|
3404
Anavex Life Sciences
AVXL
$232M
| $671K | ﹤0.01% |
+72,136
| New | +$497K |
|
|
CIVI
3405
DELISTED
Civitas Resources
CIVI
| $671K | ﹤0.01% |
9,818
-3,801
| -28% | -$272K |
|
3406
Commault Systems
CVLT
$6.19B
| $670K | ﹤0.01% |
8,399
+5,270
| +168% | +$377K |
|
3407
Century Aluminum
CENX
$4.44B
| $669K | ﹤0.01% |
55,166
+46,565
| +541% | +$365K |
|
3408
Choice Hotels
CHH
$5.15B
| $669K | ﹤0.01% |
+5,906
| New | +$675K |
|
3409
PUT
Jack Henry & Associates
JKHY
$10.9B
| $669K | ﹤0.01% |
4,100
-2,400
| -37% | -$368K |
|
3410
PUT
Kinsale Capital Group
KNSL
$8.24B
| $669K | ﹤0.01% |
2,000
-500
| -20% | -$185K |
|
3411
CALL
Grupo Aeroportuario Centro Norte
OMAB
$5.06B
| $668K | ﹤0.01% |
7,900
+900
| +13% | +$63.6K |
|
|
SAFE
3412
PUT
Safehold
SAFE
$1.19B
| $668K | ﹤0.01% |
34,700
+20,400
| +143% | +$385K |
|
|
ERF
3413
CALL
DELISTED
Enerplus Corporation
ERF
| $668K | ﹤0.01% |
43,600
+25,200
| +137% | +$409K |
|
3414
CALL
Clover Health Investments
CLOV
$2.25B
| $667K | ﹤0.01% |
700,800
-91,400
| -12% | -$89.8K |
|
3415
CALL
NETGEAR
NTGR
$681M
| $667K | ﹤0.01% |
45,800
-2,300
| -5% | -$29.8K |
|
3416
PUT
Tenable Holdings
TENB
$3.58B
| $667K | ﹤0.01% |
14,500
-6,300
| -30% | -$265K |
|
3417
CALL
Aemetis
AMTX
$109M
| $664K | ﹤0.01% |
126,900
-19,300
| -13% | -$91.3K |
|
3418
CALL
Virtu Financial
VIRT
$5.12B
| $664K | ﹤0.01% |
32,800
+15,900
| +94% | +$293K |
|
3419
CALL
Accuray
ARAY
$26.8M
| $663K | ﹤0.01% |
234,600
-1,400
| -0.6% | -$3.82K |
|
3420
CALL
Endava
DAVA
$147M
| $661K | ﹤0.01% |
8,500
+6,100
| +254% | +$378K |
|
3421
PUT
Fiverr
FVRR
$398M
| $661K | ﹤0.01% |
24,300
+5,900
| +32% | +$146K |
|
|
TUP
3422
CALL
DELISTED
Tupperware Brands Corporation
TUP
| $661K | ﹤0.01% |
330,500
+26,900
| +9% | +$48.7K |
|
3423
Dentsply Sirona
XRAY
$2.61B
| $659K | ﹤0.01% |
18,522
+8,415
| +83% | +$267K |
|
3424
CALL
Ameren
AEE
$31B
| $658K | ﹤0.01% |
9,100
+100
| +1% | +$7.61K |
|
|
SAVE
3425
DELISTED
Spirit Airlines, Inc.
SAVE
| $656K | ﹤0.01% |
+40,077
| New | +$577K |
|
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.