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 | |
|---|---|---|---|---|---|---|
2976
CALL
Installed Building Products
IBP
$6.13B
| $935K | ﹤0.01% |
3,800
-800
| -17% | -$181K |
|
2977
Tradeweb Markets
TW
$21.3B
| $935K | ﹤0.01% |
7,568
-7,115
| -48% | -$806K |
|
2978
CALL
Gogo Inc
GOGO
$515M
| $934K | ﹤0.01% |
130,200
-4,300
| -3% | -$35.1K |
|
2979
Structure Therapeutics
GPCR
$3.49B
| $933K | ﹤0.01% |
21,259
-16,078
| -43% | -$622K |
|
|
SOND
2980
CALL
DELISTED
Sonder
SOND
| $933K | ﹤0.01% |
199,500
+5,800
| +3% | +$25.6K |
|
2981
CALL
Beazer Homes USA
BZH
$907M
| $932K | ﹤0.01% |
27,300
+5,600
| +26% | +$172K |
|
2982
Enterprise Products Partners
EPD
$83.8B
| $931K | ﹤0.01% |
32,014
-92,938
| -74% | -$2.71M |
|
2983
PUT
Asana
ASAN
$1.58B
| $930K | ﹤0.01% |
80,300
-11,300
| -12% | -$149K |
|
2984
Lennar Class A
LEN
$20.4B
| $930K | ﹤0.01% |
5,128
-10,730
| -68% | -$1.8M |
|
2985
PUT
FIVE9
FIVN
$1.77B
| $927K | ﹤0.01% |
32,300
-7,600
| -19% | -$274K |
|
|
VRNA
2986
DELISTED
Verona Pharma
VRNA
| $927K | ﹤0.01% |
32,230
+21,293
| +195% | +$524K |
|
2987
Halliburton
HAL
$27.9B
| $926K | ﹤0.01% |
+31,896
| New | +$1.01M |
|
2988
CALL
CarGurus
CARG
$3.01B
| $924K | ﹤0.01% |
30,800
-3,000
| -9% | -$80.9K |
|
|
BERY
2989
PUT
DELISTED
Berry Global Group, Inc.
BERY
| $924K | ﹤0.01% |
14,810
-2,832
| -16% | -$168K |
|
|
MFA
2990
MFA Financial
MFA
$929M
| $922K | ﹤0.01% |
72,502
+56,678
| +358% | +$669K |
|
2991
CALL
Rhythm Pharmaceuticals
RYTM
$7B
| $922K | ﹤0.01% |
17,600
-14,700
| -46% | -$704K |
|
|
HUT
2992
Hut 8
HUT
$12.4B
| $921K | ﹤0.01% |
75,158
+35,735
| +91% | +$475K |
|
2993
PUT
Metropolitan Bank Holding Corp
MCB
$1.13B
| $920K | ﹤0.01% |
17,500
+16,700
| +2,088% | +$825K |
|
2994
PUT
Pitney Bowes
PBI
$2.42B
| $920K | ﹤0.01% |
129,100
+87,300
| +209% | +$589K |
|
2995
Pool Corp
POOL
$6.7B
| $920K | ﹤0.01% |
2,443
-3,005
| -55% | -$1.04M |
|
2996
PUT
Praxis Precision Medicines
PRAX
$9.07B
| $920K | ﹤0.01% |
16,000
+15,800
| +7,900% | +$854K |
|
2997
PUT
Rexford Industrial Realty
REXR
$8.7B
| $920K | ﹤0.01% |
18,300
+15,700
| +604% | +$780K |
|
2998
Teleflex
TFX
$5.85B
| $919K | ﹤0.01% |
3,718
+1,549
| +71% | +$362K |
|
2999
CALL
Webster Financial
WBS
$12.3B
| $918K | ﹤0.01% |
19,700
+2,200
| +13% | +$101K |
|
3000
Gold Fields
GFI
$29.2B
| $917K | ﹤0.01% |
59,782
-451,695
| -88% | -$6.99M |
|
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.