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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1576
PUT
TC Energy
TRP
$73.5B
| $4.47M | ﹤0.01% |
94,100
+13,700
| +17% | +$595K |
|
1577
PUT
Huntington Bancshares
HBAN
$35.1B
| $4.47M | ﹤0.01% |
304,200
-215,700
| -41% | -$3.06M |
|
|
SHNY
1578
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $4.47M | ﹤0.01% |
555,000
+211,900
| +62% | +$1.71M |
|
1579
iShares MSCI Japan ETF
EWJ
$21.7B
| $4.47M | ﹤0.01% |
+62,490
| New | +$4.35M |
|
1580
NetEase
NTES
$76.5B
| $4.47M | ﹤0.01% |
47,810
+35,683
| +294% | +$3.11M |
|
1581
CALL
Dave & Buster's
PLAY
$343M
| $4.47M | ﹤0.01% |
131,200
+8,400
| +7% | +$286K |
|
1582
United States Natural Gas Fund
UNG
$470M
| $4.47M | ﹤0.01% |
273,546
+230,136
| +530% | +$3.34M |
|
1583
PUT
2x Long VIX Futures ETF
UVIX
$286M
| $4.46M | ﹤0.01% |
3,082
+690
| +29% | +$778K |
|
|
GES
1584
CALL
DELISTED
Guess Inc
GES
| $4.46M | ﹤0.01% |
221,600
+8,700
| +4% | +$185K |
|
|
VRNA
1585
PUT
DELISTED
Verona Pharma
VRNA
| $4.45M | ﹤0.01% |
154,700
-3,200
| -2% | -$78.8K |
|
1586
CleanSpark
CLSK
$3.73B
| $4.45M | ﹤0.01% |
476,287
-60,593
| -11% | -$770K |
|
1587
PUT
Ovintiv
OVV
$17.7B
| $4.45M | ﹤0.01% |
116,100
+48,600
| +72% | +$2.1M |
|
1588
CALL
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.15B
| $4.45M | ﹤0.01% |
36,600
+7,100
| +24% | +$459K |
|
1589
Synchrony
SYF
$23.7B
| $4.45M | ﹤0.01% |
+89,127
| New | +$4.31M |
|
1590
PUT
Voya Financial
VOYA
$8.94B
| $4.44M | ﹤0.01% |
56,100
+55,600
| +11,120% | +$3.97M |
|
1591
International Flavors & Fragrances
IFF
$19.4B
| $4.44M | ﹤0.01% |
42,341
-6,006
| -12% | -$598K |
|
1592
PUT
Monolithic Power Systems
MPWR
$65.5B
| $4.44M | ﹤0.01% |
4,800
-12,000
| -71% | -$10.4M |
|
1593
CALL
Kyndryl
KD
$2.66B
| $4.43M | ﹤0.01% |
192,800
+20,700
| +12% | +$505K |
|
1594
PUT
TransDigm Group
TDG
$69.2B
| $4.42M | ﹤0.01% |
3,100
+1,000
| +48% | +$1.3M |
|
1595
PUT
GlobalFoundries
GFS
$29.4B
| $4.42M | ﹤0.01% |
109,700
+77,700
| +243% | +$3.61M |
|
1596
CALL
PTC
PTC
$13.7B
| $4.41M | ﹤0.01% |
24,400
+16,100
| +194% | +$2.83M |
|
1597
PUT
OneMain Financial
OMF
$6.9B
| $4.4M | ﹤0.01% |
93,400
-188,900
| -67% | -$9.08M |
|
1598
CALL
Peloton Interactive
PTON
$2.63B
| $4.39M | ﹤0.01% |
938,300
+209,200
| +29% | +$822K |
|
1599
Vodafone
VOD
$34.9B
| $4.39M | ﹤0.01% |
437,732
+23,192
| +6% | +$221K |
|
1600
PUT
Capri Holdings
CPRI
$1.77B
| $4.37M | ﹤0.01% |
103,000
-2,600
| -2% | -$91.2K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.