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 | |
|---|---|---|---|---|---|---|
1576
Match Group
MTCH
$8.84B
| $4.85M | ﹤0.01% |
+132,873
| New | +$4.49M |
|
1577
CALL
Citizens Financial Group
CFG
$30.4B
| $4.85M | ﹤0.01% |
146,300
-33,900
| -19% | -$933K |
|
1578
CALL
Consolidated Edison
ED
$41.6B
| $4.85M | ﹤0.01% |
53,300
-4,100
| -7% | -$366K |
|
1579
PUT
Illinois Tool Works
ITW
$81.4B
| $4.84M | ﹤0.01% |
18,500
-26,300
| -59% | -$6.3M |
|
1580
CALL
Procore
PCOR
$6.46B
| $4.84M | ﹤0.01% |
70,000
+29,900
| +75% | +$1.84M |
|
1581
PUT
Southern Copper
SCCO
$141B
| $4.84M | ﹤0.01% |
60,732
-40,451
| -40% | -$2.81M |
|
1582
CALL
Applied Digital
APLD
$7.77B
| $4.84M | ﹤0.01% |
718,100
+357,100
| +99% | +$1.92M |
|
1583
PUT
CRH
CRH
$66.7B
| $4.83M | ﹤0.01% |
69,900
+51,300
| +276% | +$3.1M |
|
1584
ProShares UltraPro Short QQQ
SQQQ
$2.21B
| $4.83M | ﹤0.01% |
+14,366
| New | +$6.25M |
|
1585
CALL
Kohl's
KSS
$2.03B
| $4.83M | ﹤0.01% |
168,400
-155,500
| -48% | -$3.65M |
|
1586
PennyMac Financial
PFSI
$4.38B
| $4.83M | ﹤0.01% |
54,647
-3,366
| -6% | -$253K |
|
1587
PUT
Freedom Holding
FRHC
$9.61B
| $4.83M | ﹤0.01% |
59,900
-33,200
| -36% | -$2.71M |
|
1588
Glaukos
GKOS
$9.02B
| $4.83M | ﹤0.01% |
60,734
+38,541
| +174% | +$2.63M |
|
1589
PUT
BridgeBio Pharma
BBIO
$16.5B
| $4.82M | ﹤0.01% |
119,500
-162,800
| -58% | -$4.89M |
|
1590
PUT
First Citizens BancShares
FCNCA
$24.6B
| $4.82M | ﹤0.01% |
3,400
-800
| -19% | -$1.12M |
|
1591
CALL
Mativ Holdings
MATV
$448M
| $4.82M | ﹤0.01% |
315,100
+34,500
| +12% | +$466K |
|
|
IMGN
1592
CALL
DELISTED
Immunogen Inc
IMGN
| $4.82M | ﹤0.01% |
162,700
+53,000
| +48% | +$1.06M |
|
1593
CALL
RenaissanceRe
RNR
$13.8B
| $4.82M | ﹤0.01% |
24,600
+22,500
| +1,071% | +$4.68M |
|
1594
PUT
American Eagle Outfitters
AEO
$2.85B
| $4.82M | ﹤0.01% |
227,700
+106,500
| +88% | +$1.98M |
|
|
1595
iShares 20+ Year Treasury Bond ETF
TLT
$42.1B
| $4.8M | ﹤0.01% |
48,567
-1,506,849
| -97% | -$136M |
|
1596
CALL
Insight Enterprises
NSIT
$3.55B
| $4.8M | ﹤0.01% |
27,100
+26,200
| +2,911% | +$4.08M |
|
1597
PUT
Roper Technologies
ROP
$36.3B
| $4.8M | ﹤0.01% |
8,800
+6,400
| +267% | +$3.3M |
|
|
TUZ
1598
PUT
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $4.8M | ﹤0.01% |
84,000
+79,400
| +1,726% | +$4.53M |
|
1599
CALL
Arthur J. Gallagher & Co
AJG
$63.7B
| $4.79M | ﹤0.01% |
21,300
+7,800
| +58% | +$1.85M |
|
1600
PUT
Franco-Nevada
FNV
$41.4B
| $4.79M | ﹤0.01% |
43,200
+19,700
| +84% | +$2.4M |
|
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.