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 | |
|---|---|---|---|---|---|---|
1651
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14.2B
| $4.11M | ﹤0.01% |
49,523
+24,814
| +100% | +$1.99M |
|
1652
PUT
Alexandria Real Estate Equities
ARE
$8.88B
| $4.11M | ﹤0.01% |
34,600
-2,300
| -6% | -$274K |
|
1653
PUT
Fiverr
FVRR
$376M
| $4.11M | ﹤0.01% |
158,800
+115,900
| +270% | +$2.81M |
|
1654
CALL
Textron
TXT
$16.6B
| $4.1M | ﹤0.01% |
46,300
-5,900
| -11% | -$521K |
|
|
VSXY
1655
Victoria's Secret
VSXY
$6.64B
| $4.1M | ﹤0.01% |
159,590
+138,607
| +661% | +$2.94M |
|
1656
Boston Properties
BXP
$11B
| $4.09M | ﹤0.01% |
50,795
+40,700
| +403% | +$2.91M |
|
1657
CALL
WillScot Mobile Mini Holdings
WSC
$4.8B
| $4.06M | ﹤0.01% |
107,900
-4,400
| -4% | -$168K |
|
1658
PUT
DigitalBridge
DBRG
$2.94B
| $4.05M | ﹤0.01% |
287,000
+249,000
| +655% | +$3.3M |
|
1659
Philips
PHG
$25.4B
| $4.04M | ﹤0.01% |
133,523
+99,134
| +288% | +$2.63M |
|
1660
PUT
Starwood Property Trust
STWD
$6.12B
| $4.04M | ﹤0.01% |
198,300
-21,300
| -10% | -$425K |
|
1661
Peloton Interactive
PTON
$2.63B
| $4.04M | ﹤0.01% |
862,658
-76,863
| -8% | -$302K |
|
|
FLG
1662
Flagstar Bank National Association
FLG
$5.77B
| $4.03M | ﹤0.01% |
359,055
-93,363
| -21% | -$993K |
|
1663
PUT
Baker Hughes
BKR
$56.8B
| $4.02M | ﹤0.01% |
111,300
+55,800
| +101% | +$1.96M |
|
1664
PUT
Ferguson
FERG
$44.7B
| $4.01M | ﹤0.01% |
20,200
+17,900
| +778% | +$3.63M |
|
1665
ProShares Bitcoin Strategy ETF
BITO
$1.4B
| $4.01M | ﹤0.01% |
208,816
-89,982
| -30% | -$1.79M |
|
1666
PUT
Commercial Metals
CMC
$7.63B
| $4M | ﹤0.01% |
72,800
+5,800
| +9% | +$314K |
|
1667
American Electric Power
AEP
$73.7B
| $4M | ﹤0.01% |
38,993
+35,095
| +900% | +$3.43M |
|
|
SMAR
1668
PUT
DELISTED
Smartsheet Inc.
SMAR
| $4M | ﹤0.01% |
72,200
-11,800
| -14% | -$572K |
|
1669
CALL
Kinross Gold
KGC
$28.5B
| $4M | ﹤0.01% |
426,900
+171,800
| +67% | +$1.54M |
|
1670
CALL
Logitech
LOGI
$15.2B
| $3.99M | ﹤0.01% |
44,500
-48,000
| -52% | -$4.27M |
|
1671
PUT
Tidewater
TDW
$3.91B
| $3.99M | ﹤0.01% |
55,600
-37,200
| -40% | -$3.24M |
|
1672
Constellation Brands
STZ
$22.2B
| $3.99M | ﹤0.01% |
15,482
-8,125
| -34% | -$2.01M |
|
1673
CALL
Tencent Music
TME
$14.5B
| $3.98M | ﹤0.01% |
330,300
-103,200
| -24% | -$1.26M |
|
1674
CALL
Zeta Global
ZETA
$4.77B
| $3.98M | ﹤0.01% |
133,300
+71,600
| +116% | +$1.68M |
|
1675
Seagate
STX
$193B
| $3.97M | ﹤0.01% |
36,264
-48,632
| -57% | -$4.97M |
|
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.