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 | |
|---|---|---|---|---|---|---|
1326
PUT
Kinder Morgan
KMI
$72.8B
| $7.07M | ﹤0.01% |
400,700
+236,400
| +144% | +$4.03M |
|
1327
PUT
Mondelez International
MDLZ
$77.6B
| $7.02M | ﹤0.01% |
96,900
-73,400
| -43% | -$5.03M |
|
1328
CALL
Harley-Davidson
HOG
$2.77B
| $7M | ﹤0.01% |
190,100
-59,200
| -24% | -$1.82M |
|
|
APLS
1329
PUT
DELISTED
Apellis Pharmaceuticals
APLS
| $6.99M | ﹤0.01% |
116,800
-106,900
| -48% | -$5.42M |
|
|
MPT
1330
PUT
Medical Properties Trust
MPT
$2.91B
| $6.98M | ﹤0.01% |
1,421,800
+297,000
| +26% | +$1.45M |
|
1331
CALL
Nasdaq
NDAQ
$52.3B
| $6.96M | ﹤0.01% |
119,800
+28,500
| +31% | +$1.5M |
|
1332
CALL
IonQ
IONQ
$12.6B
| $6.94M | ﹤0.01% |
560,200
+42,800
| +8% | +$552K |
|
1333
CALL
Southern Copper
SCCO
$143B
| $6.94M | ﹤0.01% |
86,944
+1,402
| +2% | +$97.5K |
|
1334
PUT
Peabody Energy
BTU
$2.82B
| $6.92M | ﹤0.01% |
284,700
-191,600
| -40% | -$4.62M |
|
1335
CALL
StoneCo
STNE
$2.7B
| $6.86M | ﹤0.01% |
380,700
+58,600
| +18% | +$770K |
|
|
SPWR
1336
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $6.86M | ﹤0.01% |
1,421,100
+1,226,700
| +631% | +$5.86M |
|
1337
CALL
CleanSpark
CLSK
$3.88B
| $6.85M | ﹤0.01% |
621,300
+470,700
| +313% | +$2.93M |
|
1338
CALL
CSX Corp
CSX
$98.6B
| $6.85M | ﹤0.01% |
197,500
+34,000
| +21% | +$1.08M |
|
1339
PUT
Skyworks Solutions
SWKS
$9.12B
| $6.82M | ﹤0.01% |
60,700
-164,700
| -73% | -$16.1M |
|
1340
PUT
Texas Roadhouse
TXRH
$12.8B
| $6.82M | ﹤0.01% |
55,800
+1,100
| +2% | +$118K |
|
1341
PUT
Entegris
ENTG
$20B
| $6.82M | ﹤0.01% |
56,900
+26,900
| +90% | +$2.73M |
|
1342
CALL
Ball Corp
BALL
$16.8B
| $6.8M | ﹤0.01% |
118,200
+58,600
| +98% | +$3.02M |
|
1343
CALL
Freshpet
FRPT
$2.84B
| $6.79M | ﹤0.01% |
78,300
-2,300
| -3% | -$158K |
|
1344
CALL
Deutsche Bank
DB
$66.8B
| $6.77M | ﹤0.01% |
499,700
+48,600
| +11% | +$572K |
|
1345
CALL
Tilray
TLRY
$484M
| $6.77M | ﹤0.01% |
303,160
-8,750
| -3% | -$169K |
|
1346
Teva Pharmaceuticals
TEVA
$36B
| $6.75M | ﹤0.01% |
647,080
+13,103
| +2% | +$122K |
|
|
XIFR
1347
CALL
XPLR Infrastructure LP
XIFR
$1.19B
| $6.73M | ﹤0.01% |
221,400
+90,200
| +69% | +$2.3M |
|
1348
CALL
NNN REIT
NNN
$9.33B
| $6.72M | ﹤0.01% |
155,900
-1,100
| -0.7% | -$42.6K |
|
1349
PUT
Fastly Inc
FSLY
$3.16B
| $6.71M | ﹤0.01% |
377,300
+42,500
| +13% | +$717K |
|
|
ZIMV
1350
PUT
DELISTED
ZimVie
ZIMV
| $6.71M | ﹤0.01% |
377,800
+377,600
| +188,800% | +$3.8M |
|
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.